EARLY SPRING IN COBBS CREEK PARK

 Spring beauty blooms.  Bocce Woods, Cobbs Creeek Park, West Philadelphia
Spring beauty blooms. Bocce Woods, Cobbs Creeek Park, West PhiladelphiaÂ

SANGUINE ROOT VISITS BOCCE COURT WOODS SECTION OF COBBS CREEK PARK, NOT ONE MILE SOUTH OF MORRIS PARK. IT’S GOOD TO KNOW YOUR NEIGHBORS.

 

 

Bloodroot flower blooms under protection of the leaf litter.  Bocce Woods, Cobbs Creeek Park, West Philadelphia
Bloodroot flower blooms under protection of the leaf litter. Bocce Woods, Cobbs Creeek Park, West Philadelphia

 

 

 

The Sanguine Root staff is very interested in what blooms where and when.  This way we can learn more about the plants in Morris Park, and their relationship to the rest of the world. Last summer we saw a large patch of bloodroot growing along the trail in The Bocce woods of Cobbs Creek Park.  This area of  high-quality woods is about one mile south of Morris Park and is a bit lower in elevation.  At this time of year, elevation means alot in terms of blooming spring ephemeral flowers and development of buds on trees.  The subtleties of location become important and it makes where we live and the immediate environs that much more interesting. The Bocce woods area, our immediate neighbor to the south is teaching us more about Morris park than we had imagined. A comparative perspective allows us to begin to understand why certain plants and trees grow in certain locations and bloom at different times.  We read about such plants as the Red maple or the Bloodroot, the Sycamore tree or the Spicebush, but to witness them in wild, in varying locations, in the field, is the best education. In the past month, we have seen quite a dramatic landscape of species in many different locations, and the effect on us is stunning- Mayapples reaching maturity  in Florida and Bloodroot that has already begun seed production in the first week of March is an enlightening experience. Now we are interested in the differences of environments and ecosystems of Fairmount Park here in Philadelphia. Even a mile apart is a world of difference!

  Sycamore, Bocce Woods, Cobbs Creek Park, West Philadelphia
Sycamore, Bocce Woods, Cobbs Creek Park, West Philadelphia

Claytonia virginica

We were pleasantly surprised to find Claytonia virginica (Spring Beauty) blooming at this time. Yet just one mile south of Morris Park, there it was!  We dont expect to find this one for a few weeks yet!  It must be noted that the area that it is blooming is especially sunny, because this is an area of total canopy failure.  The invasive vegetation had completely overtaken any  young trees that were trying to re-forest this location and destroyed them.  In the late 1990s, Fairmount Park created the Master Plan and this area was targeted for restoration and given a high priority status. Since then, the invasives have been eradicated, and forest trees have been replanted.  We found specimens of White Oak, Dogwood and Redbud planted in a vast field that is on its way to being re-forested.  Many native trees were  noted, marked and spared from the eradication process and thrive in the area. We saw plenty of Black Cherry, Sycamore, Red Maple, Spicebush, Silver maple, and Oak that were carefully marked and left alone in this very comprehensive program of Urban Environmental Restoration.  All of thee trees provide a significant amount of contributions to the native ecosystem as a whole. From the Spicebush swallowtail butterfly whose larval stage is completely dependent on this native shrub, to the over 4o0 species of insects and birds that include oak trees in their survival strategy, the efforts of environmental restoration in the Bocce Woods section of Cobbs Creek Park deserve special mention- efforts like this are the blueprint for future of degraded urban forests.  This area was the most challenging. A severely degraded urban forest, that has lost most of its canopy, adjacent to a minimally disturbed forest with a healthy variety of trees that must be protected from further disturbance.

The blooming Spring beauties, a beautiful native spring ephemeral wildflower, tell us this story  just by blooming in the sun of March 26, in Cobbs  Creek Park. In  an area of intense degradation, where a serious effort has been made to reverse this situation and to restore the original forest.  Right in the middle of this, the native wildflower, Claytonia virginica blooms.

 Spring beauty blooms.  Bocce Woods, Cobbs Creeek Park, West Philadelphia
Spring beauty blooms. Bocce Woods, Cobbs Creeek Park, West Philadelphia

The Sanguine Root is very impressed by the amount of care and effort made to restore the area around the pond of the Bocce Woods.  We decided to visit the pond and appreciate its beauty.

 Spring beauty blooms.  Bocce Woods, Cobbs Creeek Park, West Philadelphia
Spring beauty blooms. Bocce Woods, Cobbs Creeek Park, West Philadelphia
Platanus occidentalis, American sycamore, Bocce Woods, Cobbs Creek Park, Philadelphia Pennsylvania
Platanus occidentalis, American sycamore, Bocce Woods, Cobbs Creek Park, Philadelphia Pennsylvania

We were enchanted by the beautiful stand of sycamores in the late march afternoon sun, a colony of trees that is an indicator of a wetland, stream, creek, river , pond and lake.  These trees are very comfortable with water, standing water, flooding conditions, or even in just very most soils, this tree is to be found. The stand of trees rose out of the area in a striking pose, indicating the wetland beneath them.  We were riveted by the arrangement of the trees and began our descent into the wetland area. We knew that there was this seasonal pond there and we had seen its dried up state last summer in 2010, and now, in late March ’11, we could see the whole pond from a distance.

The seasonal pond of the Bocce Court Woods, Cobbs Creek Park, Philadelphia Pennsylvania
The seasonal pond of the Bocce Court Woods, Cobbs Creek Park, Philadelphia PennsylvaniaÂ

It was exciting to see the real pond, actually there. We knew of it from the Fairmount Park Master Plan but had never seen it before.  To reach the water was a challenging adventure through mats of Japanese honeysuckle climbing up spice bush.  We thought to ourselves that if we were ever done with the work in Morris Park we would love to put our restoration efforts in this area, which has such great potential.  Even if we could spend a day here, we could do so much.  The travail through the thickets was worth it.  The pond was mesmerizing.  The reflection of the sycamores in the water was magical.  One sycamore had fallen into the water, and created a beautiful island.

Sycamores - The seasonal pond of the Bocce Court Woods, Cobbs Creek Park, Philadelphia Pennsylvania
Sycamores - The seasonal pond of the Bocce Court Woods, Cobbs Creek Park, Philadelphia Pennsylvania

 

Red Maple blossom - near the seasonal pond of the Bocce Court Woods, Cobbs Creek Park, Philadelphia Pennsylvania
Red Maple blossom - near the seasonal pond of the Bocce Court Woods, Cobbs Creek Park, Philadelphia Pennsylvania

 

Acer rubrum

Late March here in Philly, the Red maple is in full bloom. The beautiful red haze can be seen in the woods, usually in moist areas, lowland spots near the rivers or along the tributaries.  The rich red color is not to be underestimated. A view of the whole tree in bloom is a scene of grandeur.

 

Red Maple, Bocce Woods, Cobbs Creek Park, West Philadelphia
Red Maple, Bocce Woods, Cobbs Creek Park, West Philadelphia

 

Red Maple, Bocce Woods, Cobbs Creek Park, West Philadelphia
Red Maple, Bocce Woods, Cobbs Creek Park, West Philadelphia

This older specimen of Red maple in bloom gives a suggestion of its growth habit in the wild. the two trees in the foreground are Ailanthus altissima, an invasive exotic tree. They appear to have been part of the invasive control program, and show signs of having been treated with a basal bark herbicide.

 

 Isabelle Dijols with Red Maple, Bocce Woods, Cobbs Creek Park, West Philadelphia
Isabelle Dijols with Red Maple, Bocce Woods, Cobbs Creek Park, West PhiladelphiaÂ

We could find last years leaves underneath the tree.

  Canopy failure, Bocce Woods, Cobbs Creek Park, West Philadelphia
Canopy failure, Bocce Woods, Cobbs Creek Park, West Philadelphia
Canopy failure, Bocce Woods, Cobbs Creek Park, West Philadelphia
Canopy failure, Bocce Woods, Cobbs Creek Park, West Philadelphia

 

Here is a total mess of Multi-flora rose, Japanese honeysuckle, Asiatic bittersweet, running rampant over a forest trying to regenerate from previous sequences of disturbance.  Only a serious human intervention will restore the forest at this point, which is what is happening just to the north of this site.

 Spicebush in bloom, Bocce Woods, Cobbs Creek Park, West Philadelphia
Spicebush in bloom, Bocce Woods, Cobbs Creek Park, West Philadelphia

Back to focusing on the beauty of Cobbs Creek park, we are very pleased with the blooming Spicebush (Lindera benzoin).

 Spicebush in bloom, Bocce Woods, Cobbs Creek Park, West Philadelphia
Spicebush in bloom, Bocce Woods, Cobbs Creek Park, West Philadelphia
 Spicebush in bloom, Bocce Woods, Cobbs Creek Park, West Philadelphia
Spicebush in bloom, Bocce Woods, Cobbs Creek Park, West Philadelphia

Lindera Benzoin

Far below the haze of red blooming Acer rubrum, is the yellow haze of the understory shrub Lindera benzoin, our most common native shrub in Cobbs Creek Park, Morris Park and in West Fairmount Park.  The Spicebush blooms are a spectacular sight, and they create a beautiful yellow in the understory of the woods in late March and early April. The bright yellow flowers contrast nicely with the dark bark of this stately shrub. Finding these yellow flowers in the late winter and early Spring woodland is an experience not to be missed. This is the time of the red and yellow haze in the early spring forest.

Bloodroot, Bocce Woods, Cobbs Creek Park, West Philadelphia
Bloodroot, Bocce Woods, Cobbs Creek Park, West Philadelphia
Bloodroot grows in this high quality woods, Bocce Woods, Cobbs Creek Park, West Philadelphia
Bloodroot grows in this high quality woods, Bocce Woods, Cobbs Creek Park, West Philadelphia

This section of the Bocce Woods is the best part. It is a woodland area on a hillside that has not been highly disturbed, and has the diversity of trees that can maintain a forest canopy, and host a healthy shrub layer, as well as an understory tree layer.  We found Redbud (Cercis canadensis) in this forest.  While not absolutely sure, we think these specimens we found are original to the woodland.  We did not see them any where else in the area except in this mature wooded site.   This is an area that is unique in its undisturbed condition, and all of the efforts being made to protect it are worthwhile and necessary.

Along Cobbs Creek, Bocce Woods, Cobbs Creek Park, West Philadelphia
Along Cobbs Creek, Bocce Woods, Cobbs Creek Park, West Philadelphia

We made our way towards Cobbs Creek after admiring the magnificent stand of Bloodroot.  Cobbs Creek is a beautiful feature of drainage under siege of the urban landscape.  The dams that the authors of the Fairmount Park Master Plan recommended be removed are still in place, and the invasive vegetation has not yet been controlled or eradicated.  Most striking is the invasive Ranunculus ficaria,  Lesser celandine, which has completely covered the area around the creek, crowding out the native plants.  Also, we saw the old canes and the young shoots of  Japanese Knotweed, also a problematic invasive, recommended by the Master Plan for control. Visiting this area of Cobbs Creek Park surely is a roller coaster of sights and problems.  One minute we are wowed by the beauty of the undisturbed woods, horrified by the conditions surrounding this forest, and again, wowed by the efforts to reverse the degradation of this important forest.

The Bocce woods of the Cobbs Creek Park must be preserved and saved. For the good of all citizens of Philadelphia, as well as the integrity of the natural landscape of the area, this special forest tract contributes to the ecosystem and watershed of the Delaware river, the Darby Creek watershed, Cobbs Creek Park and West Philadelphia.

This site must be protected. All of our efforts to restore a small section of Morris Park, just one mile north and upstream of the Bocce woods are meant to be complementary.  Seeds from invasive plants we eradicate will not be washed downstream. Our removal of invasive species in Morris Park will allow native plants to grow and thrive, which will allow native species of insects and birds that can only survive with native plants, to live and thrive.  The seeds of these native plants will be carried  by water, wind and bird, eventually from Morris Park, one mile south to the Bocce Woods of Cobbs Creek Park, we hope and imagine.

THE ROSE IS DEPOSED

WHICH SPECIES WILL INHERIT THE FOREST?

Isabelle Dijolsstands before an at-risk forest where Multiflora rose and Japanese Honeysuckle choke out the young trees that are the potential forest of 2061.
Isabelle Dijols stands before an at-risk forest where Multiflora rose and Japanese Honeysuckle choke out the young trees that are the potential forest of 2061.

THE SANGUINE ROOT ENVIRONMENTAL RESTORATION TEAM TOURS MORRIS PARK. MULTI-FLORA ROSE FOUND TO COMPLETELY DESTROY NATIVE HERBACEOUS POPULATIONS AND SEVERELY STIFLE GROWTH OF  TREES AND SHRUBS.

Restored and closely monitored section of Morris park road trail near intersection of upper trail.  Morris Park Philadelphia
Restored and closely monitored section of Morris Park Road trail near intersection of Upper Trail. Morris Park Philadelphia

This week’s rain gave Morris Park  vibrant and rich colors, reminiscent of fall, and sharply contrasting with the past few months snowy winter landscape.  A welcome change and transition into spring.

The site in the above picture is rich with diversity. It is graced with many tree saplings, that will become the future forest as long as they are protected.

Japanese Honeysuckle (Lonicera japonica) has overtaken the trees and shrubs, shaded out and eliminated the herbaceous plant layer, putting this whole area at risk of deforestation. Area near 66th street and Woodbine Avenue.  Morris Park Philadelphia
Japanese Honeysuckle (Lonicera japonica) has overtaken the trees and shrubs, shaded out and eliminated the herbaceous plant layer, putting this whole area at risk of deforestation. Area near 66th street and Woodbine Avenue. Morris Park Philadelphia

The rich vibrancy of the late winter forest also highlighted the harsh realities it faces.  This severely degraded area surrounded by vine covered at-risk trees is a soon to be gaping hole in the forest that could take half a century to recover from. That is only if there is human intervention. If there is not, this infestation will spread outwards consuming even more acreage of forest.  All the while spewing out massive quantities of seed, threatening other areas of the park and other natural areas beyond, as well as the yards of neighboring homes.

  Isabelle prepares to remove Japanese honeysuckle from a young tree near the Morris Park Road trail, Morris Park Philadelphia
Isabelle prepares to remove Japanese honeysuckle from a young tree near the Morris Park Road trail, Morris Park Philadelphia

The Japanese Honeysuckle and Multiflora rose (Rosa multiflora) vines will kill a small tree or even a whole grouping of trees, denying the forest its regenerative ability.  Those majestic tall trees overhead are not going to last forever, and when they die, what will there be to replace them?  An invasion of exotic, imported plants, often escaped from yards and gardens, will set a forest back many years, if not altogether destroying it.  What was innocently purchased at the garden center, with the best intentions of beautifying ones yard and bringing joy to our families and neighbors, in many cases has easily escaped into the natural world and has turned into a growing menace, blighting forests and endangering species.

 Large thicket of Multi-flora rose presents a daunting task for the Sanguine Root's Environmental Restoration Team. Morris Park, Philadelphia
Large thicket of Multi-flora rose presents a daunting task for the Sanguine Root's Environmental Restoration Team. Morris Park, Philadelphia

Japanese Honeysuckle remained an innocuous and pretty yard enhancement in the United States for many years. It didnt escape or present itself as a problem. Then it became a problem. What changed? How did this pretty vine become a pest?  The answer lies in the fact that it is a plant that evolved for millions of years on another continent, in a complex ecosystem of checks and balances, with many other species playing a part in the success and failures of Japanese Honeysuckle.  Brought to the far shores, 7-10,000 miles away from its evolutionary birthplace and home, the species adapted, was admired and widely planted and enjoyed as a garden specimen. Its fragrant flowers are a joy to experience.

Then it became a noxious weed.  A plant that has never been in this ecosystem, can either immediately die, like a palm tree from the big box store, or it can turn into a monster, and run rampant through the woods.

The Multiflora Rose is carefully approached and clipped down. The thorns are sharp and painful. Not  a garden beauty, this mistaken introduction.  Morris Park, Philadelphia
The Multiflora Rose is carefully approached and clipped down. The thorns are sharp and painful. Not a garden beauty, this mistaken introduction. Morris Park, Philadelphia

Multi flora rose was also introduced with the best of intentions. Its roots were used in the nursery industry, the Multiflora rose was thought to be a useful base species for grafting more glorious rose plants on top of the cut canes.  Then the Multi-flora rose was thought to be a good plant for roadsides, and was widely planted to prevent erosion of embankments all over the country.  This practice spread the exotic species everywhere, and now it is such a problem that it is classified as a noxious weed in some states. Pennsylvania, which has only classified 13 noxious weeds, includes Multiflora rose. (Just to note, it is very interesting to see which states classify noxious weeds and how many and if they do at all. New Jersey claims by default that there are no noxious weeds in the state by not even having a classification.)

Today the environmental restoration team found a patch of Multiflora rose that was threatening existing live saplings of  native trees and shrubs that were growing in the midst of the infestation. Usually we prioritize invasive eradication for situations where the invasives are threatening a less disturbed native ecosystem, or the invasive species is an emerging threat in the forest such as the Japanese Angelica tree (Aralia elata).  When we found that there were native shrubs and trees that were still alive in the mass of Rosa multiflora, we made our move.

We suited up in denim, put on some tough gloves, sharpened our clippers to a razors edge, oiled our tools and strategized.

Isabelle, determined, prepared and happy to spend a sunday afternoon eradicating Multiflora rose from the state of Pennsylvania where it is classified as a noxious weed. A citizen called to duty by her state, Isabelle rises to the occasion, with a positive attitude and thick gloves. Pennsylvania becomes that much more a better state as she cuts through and eradicates its officially sanctioned noxious weed. It has become the time for citizens to rise up against the threats to our ecosystems that our lives depend on. Morris Park Philadelphia
Isabelle, determined, prepared and happy to spend a sunday afternoon eradicating Multiflora rose from the state of Pennsylvania where it is classified as a noxious weed. A citizen called to duty by her state, Isabelle rises to the occasion, with a positive attitude and thick gloves. Pennsylvania becomes that much more a better state as she cuts through and eradicates its officially sanctioned noxious weed. It has become the time for citizens to rise up against the threats to our ecosystems that our lives depend on. Morris Park Philadelphia

The thicket we decided to remove was about 15 feet across and as wide. It was covered with Japanese honeysuckle (Lonicera japonica) and Oriental bittersweet (Celastrus orbiculatus), another problematic invasive vine that was once widely sold as a pretty garden vine.  Also next to the patch was The Japanese Angelica Tree, (Aralia elata). Just last week we had mapped this site for our Aralia elata map and named it Site 32.  It can be viewed in our fun and educational interactive mapping feature on the Sanguine Root homepage. Featured will be an arial photo and map.

The Multiflora rose patch in Aralia elata Site #32.   Morris Park, Philadelphia
The Multiflora rose patch in Aralia elata Site #32. Morris Park, Philadelphia

Speaking of fun, we would not do this if it was not fun.  It is a great excuse to be outside and to interact with nature in a constructive manner.  Fun and adventure can often go hand-in hand. Adventure usually involves a discovery of some sort: This Sunday the discovery of a most precious tiny sapling of a Beech tree (Fagus grandifolia) next to the thicket, covered in Japanese Honeysuckle.  This little one still had its leaves from last year, hanging on, just like its older members of the forest.

Isabelle Dijols discovered this tiny Beech tree under a thicket of japanese honeysuckle.  She removed the problematic vine, and uprooted all the vines surrounding the tree sapling. Here she proudly shows off her discovery and rescue operation.
Isabelle Dijols discovered this tiny Beech tree under a thicket of Japanese honeysuckle. She removed the problematic vine, and uprooted all the vines surrounding the tree sapling. Here she proudly shows off her discovery and rescue operation.

Some humans had decided that it was perfectly acceptable to routinely dump their trash in this section of the forest. Mostly beer bottles and cans. Parts of toys, some car parts, spray paint cans.  Two party spots were discovered, created by those who have no problem drinking beer in the midst of their own filth.

Party spot #1, Near Lotus Road, Morris Park, Philadelphia
Party spot #1, Near Lotus Road, Morris Park, Philadelphia

This was found while picking up a trail of trash that led to this site.

a trash dump near Lotus Road, Morris Park Philadelphia
A trash dump near Lotus Road, Morris Park Philadelphia

After filling an entire bag and a dumped plastic crate of this trash, it quickly became evident that there was more trash here than we could handle for the time being.  As resources permit, we will further address this dumping site.  Also the task began to lose its charm, and was no longer as fun as picking up scattered trash in the woods.

Sean Solomon proudly displays his recently gathered trash from the forest floor.  Morris Park, Philadelphia
Sean Solomon proudly displays his recently gathered trash from the forest floor. Morris Park, Philadelphia

After removing the trash and invasives, the area was starting to take shape. It is starting to look like a woods should look.  The Tulip Poplars (Liriodendron tulipifera) create a decent canopy.  Below that are some mid-sized Sweet Gum  trees (Liquidamber srtyraciflua), and a few oaks and Beeches approaching twenty feet tall. Also, some decent Black Cherry(Prunus serotina), and Flowering Dogwood (Cornus florida) and Hickory.  We uncovered and liberated a decent shrub layer of Spicebush (Host to the larvae of the Spicebush Swallowtail butterfly (Papilio troilus)) as well as a yet un-identified shrub dogwood.  It will be fun to see what herbaceous perennials will grow at the site.  We have never been able to access this area when they grow because of the thorny thickets. Just to the north of the site, there is Bloodroot (Sanguinaria canadensis).

It is really fun to explore a new area and see what trees are growing there, and make an assessment of the conditions.

Trash at The Lotus Road party spot #2. Morris Park, Philadelphia
Trash at The Lotus Road party spot #2. Morris Park, Philadelphia

The green canes above the trash is none other than Rosa multiflora. We plan on addressing this site in time.  We will first cut the canes, working from the outside of the site inwards.  After the canes are cut down, we will use a mattock to assist in pulling out the roots.  We will also be able to pick up the trash.  When we are done restoring the site, we just sit back and relax, while we watch a symphony of native plants grow on their own.   There will be Tulip Poplars and Sassafrass popping up, which is great because these are fast growing, pioneer trees, and are perfect for forest canopy restoration, something needed in an at-risk forest such as this.  Spicebush will begin to grow as well as a laundry list of native herbaceous plants.  My bet is on Jack-in-the Pulpit (Ariseama triphyllum), a magnificent forest floor specimen, Mayapple (Podophyllum peltatum)an umbrella like and distinctive plant with a graceful waxy flower, Bloodroot (Sanguinaria canadensis) a stunning early spring flower (see ‘about the Sanguine Root’) that has attained a cult-like status, and wild geranium (Geranium maculatum).

These plants will just grow on the site.  Step one: Remove the invasives.  Step two:  Watch the native plants grow.  Step 3: Monitor the site  for invasive plants and remove as they come.

The follow-through step is important. A restoration site needs stewardship.  Even a few minutes time, at the right time of the year can make a huge difference in the long-term outcome of a restoration project.

For example: When the month of May decides to grace us with its presence, we will be faced with a Garlic Mustard (Alliaria petiolata) infestation at numerous sites undergoing restoration. This invasive exotic from Europe is a big mess in Morris Park. It will be the subject of much discussion in the coming months. For now, we know its coming and we know we will have to return to every site we have worked on in the past year and pull it up.  It doesnt take long at all to pull it up at any given site, and when we do we can be sure that it will not reseed itself that year. This invasive depends on reseeding itself to survive.  Knowing this will help our eradication strategy.  The native plants need some help in getting established in a previously disturbed site.  Mainly just by removing the invasives.  This process is not gardening, where we decide what goes where, but instead we decide what does not belong and what does. Where what does belong is not up to us to decide. This is an exciting part of environmental restoration.  What will grow, and where?

The Official photo of the Aralia elata mapping site # 32 of the Sanguine Root Mapping Project.  Morris Park, Philadelphia
The Official photo of the Aralia elata mapping site # 32 of the Sanguine Root Mapping Project. Morris Park, Philadelphia

If we can be of some assistance in minimizing the negative effects of the human impacts on the forest, we are there.  Watching the forest operating on its own, without the burden of exotic invasives is very interesting.  Urban environmental restoration is a fun and engaging enterprise.

THREAT ASSESSMENT: MAPPING A FOREST’S FUTURE

SANGUINE ROOT STAFF TASKED WITH MAPPING SPECIES ARALIA ELATA IN MORRIS PARK. OVER THIRTY DISTINCT POPULATIONS FOUND PARK-WIDE.  SPECIMEN COUNTS INTO THE THOUSANDS AT SOME SITES.

The Japanese angelica tree (Aralia elata) grows along the riverbanks near the picturesque Stone Sherwood Road bridge in Morris Park Philadelphia
The Japanese angelica tree (Aralia elata) grows along the river banks near the picturesque Stone Sherwood Road bridge in Morris Park Philadelphia

We were charged with the task of mapping out the populations of  the invasive exotic  Japanese angelica tree, Aralia elata, so that the eradication strategy can be done as efficiently as possible, targeting the populations that threaten crucial areas of the park first. These populations would be the ones threatening the least disturbed areas of the Park. These areas get the highest priority of protection.

On this past Friday’s Aralia elata eradication work-day, we were awakened to the alarming expansion rate of this species. Isabelle astutely asked “how old are these trees?” We counted the rings of  a specimen stump we cut in preparation for the triclopyr herbicide , and we got the answer. The specimen, approximating two inches in diameter at the base was not even 10 years old.

The large area we were trying to eradicate was young.

 

 

A small population of Aralia elata has been detected next to a section of high-quality forest
A small population of Aralia elata has been detected next to a section of high-quality forest

We decided to make a day of it and map out all of the populations we could find. We were surprised to find large populations that we had not previously noticed. In the picture to the left, we found a small grouping of this invasive exotic growing adjacent to site v-79a, designated a high-quality forest site with a high priority of protection by the Fairmount Park Master Plan. This, in our estimation, should be given priority status in eradication.

The mapping exercise was a fun and educational way to spend a sunday afternoon.  It was like going for a walk in the woods with a purpose. As we drew our map, our understanding of the park was expanded greatly and we became very aware of the park’s relationship to the species Aralia elata. We noticed that the largest populations tend to grow further from the creek on drier land. We also noted that when there is one noticeable specimen, there can be many smaller ones to be found. This helped us count the populations as we became familiar with the growth habits of groupings of different sizes.

Sean Solomon was not pleased to discover a population of over 1000 Aralia elata directly adjacent to a high priority protection site, The Fairmount Park Master plan site s30, a stunning water cascade of  west Indian Creek and rock feature
Sean Solomon was not pleased to discover a population of over 1000 Aralia elata directly adjacent to a high priority protection site, The Fairmount Park Master plan site s30, a stunning water cascade of west Indian Creek and rock feature

We also became familiarized with the shape, color and habit of the species, to the point where we could spot even a small one from a distance. We trained ourselves over the past few weeks.

Site s30 with a large infestation of Aralia elata on the hillside above it  West Branch of Indian Creek, Morris Park Philadelphia
Site s30 with a large infestation of Aralia elata on the hillside above it West Branch of Indian Creek, Morris Park Philadelphia

Even with the 30+ populations we discovered, and the numerous specimens to be eradicated, we are optimistic of the eventual eradication of this species from Morris Park.  So far, in just one day, we made a serious effort at eradication of 2 populations approximating 500 specimens. With this in mind, the possibility of a complete map and an eradication blueprint that can be completed with the aid of Fairmount Park and  community volunteers, could be attained.  The importance of this accomplishment will not only benefit Morris Park, but any natural areas nearby and the environment as a whole as this problematic species is addressed.

Site s30 awaits preservation and future restoration of its immediate neighboring areas.  Morris Park, Philadelphia
Site s30 awaits preservation and future restoration of its immediate neighboring areas. Morris Park, Philadelphia
Aralia elata near the Woodcrest avenue opening, Morris Park, Philadelphia
Aralia elata near the Woodcrest Avenue opening, Morris Park, Philadelphia

The Sanguine Root staff urges that eradication of this emerging invasive species be prioritized. The dense stands of Aralia elata have not yet completely crowded out the native species in their shared areas, and the populations have not yet become widespread in their potential habitats, like so many other invasives in Morris Park.  However, judging from the spreading habit and rate of increase, this species presents a threat to Morris Park’s upland areas and well-drained hillsides, where some of the most diverse and high quality forested areas are present.

The Japanese angelica tree has a distinctive winter pose, left front in the foreground, the lighter colored tree
The Japanese angelica tree has a distinctive winter pose, left front in the foreground, the lighter colored tree

Please be sure to visit our mapping efforts on our website. We will be continuing to improve the map, and update the status and exact locations of individual specimens and populations. We will also be uploading a photograph of each site when it is appropriate.