Foray to Frazier's Bog

Morton Arboretum's Joe Rothleutner's preparing an herbarium specimen

On Wednesday, July 8, I had the good fortune to escort two horticultural professionals to an amazing wetland located 0.3-mile from my office--a forested swamp known as Frazier's Bog.

The swamp is not, in fact, a bog.  Bogs are characterized by standing water which is often stained tea-brown by tannins leached from decomposing organic matter.  In addition, bog water is acidic.  Frazier's Bog is actually a fen, which has running (albeit slowly running), clear water that tends to be neutral or slightly basic.  The water at Frazier's Bog seeps out of a porous quartizite bedrock ridge immediately to the north, and the shallow rills, runnels, and rivulets that thread through the wetland flow over sandy beds.

The swamp is also amazing because it's a Coastal Plain outlier.  My preserve and environs are on the solid, metamorphic rocky Piedmont; the edge of the sandy Coastal Plain lies about 10 miles to the south.  Nevertheless, many of the the plants that occur in Frazier's Bog are plants typical of the Coastal Plain in New Jersey, not the Piedmont.  So, Frazier's bog is a rarity--an island of the Coastal Plain 250 feet above sea level in a shallow basin in the Piedmont. 

The bog's unusual nature has been recognized for a century and a half, and over the years countless botanic field trips have tromped through the spongy, saturated site.  Currently, the wetland is located at the edge of the second fairway of a private country club's golf course, but fortunately the country club recognizes the botanic gem and has posted signs to keep golfers out of the swamp (which is a treasure trove of lost golf balls).

Fortunately, the country club recognizes the wetland's value

Frazier's Bog (and and only two other sites in Pennsylvania) support sweetbay magnolia trees (Magnolia virginiana).  The Morton Arboretum in Lisle, Illinois and the Chicago Botanic Garden (CBG) have joined forces to create a sweetbay magnolia collection that includes specimens from the full range of the tree - Massachusetts to Cuba.  On Tuesday, Andrew Bunting of CBG and Joe Rothleutner of the Morton Arboretum came to Frazier's Bog to make softwood cuttings from 10 magnolias growing in the swamp.  They will attempt to root the specimens so they can be planted in the botanic gardens, and so that they can be propagated and shared with other gardens.  In addition, they are creating a germplasm "bank" in case the sites where these trees occur naturally are eliminated by hurricanes, tornadoes, fire or development. 

 Chicago Botanic Garden's Andrew Bunting "bagging" his quarry

The swamp floor is carpeted with skunk cabbage and ferns

In addition to taking the softwood cuttings, the pair collected specimens of the leaves and fruit from each of the sampled trees to include in an herbarium collection.

The Dynamic Duo just before leaving the swamp

After we left the swamp, we crossed to the opposite side of the fairway (fore!) to check on another Coastal Plain species, netted chain fern (Woodwardia areolata).

Joe photographing netted chain fern

When the country club resurrected this 9-hole course about 20 years ago (it had been "abandoned" during the Great Depression), they had enclosed the stand of ferns inside orange construction fencing.  The construction fencing is long gone (so as not to offend the sensibilities of the the golfers) and has been replaced with unobtrusive wire mesh fencing (which is collapsed and useless); the ferns, nonetheless, are thriving.

Late Summer on the Trail

Japanese angelica-tree (Aralia elata) seeds

It's been a while since I've posted (mostly because Kali's broken foot kept me from getting out much during her four-week convalescence), but her cast came off last Tuesday, the crutches are stored in the attic, and Kali is, once again, driving herself to and from work.  On Saturday afternoon, we took advantage of her new-found freedom and nice weather to walk on the level, even-surfaced rail-to-trail pathway in the county park downstream of my preserve.  It was the longest walk Kali had taken in five weeks, so we started out slowly; she was only able to walk a mile before her foot began to hurt and we turned around, but in that distance I got some late summer images.

Kali on the trail

One long section of the trail is bordered by dense growth of non-native, invasive Japanese angelica-tree (Aralia elata).  This plant is closely related to native Aralia spinosa, which is also known commonly as Hercules'-club or devil's walking stick. 

Aralia alongside the trail

Aralia branch and flower/seed stalk from below

Angelica-tree and Hercules'-club have the largest leaves of any plant in the mid-Atlantic.  Each leaf is pinnately compound, with a dozen or so leaflets strung along a central rachis.  The tree produces tiny white flowers on feathery pink flower stalks, giving the plant an interesting and unmistakable appearance.

Aralia leaves and flower stalks from above

Aralia gets its common name of devil's walking stick because the stem and even the leaves are liberally  festooned with defensive thorns.

Aralia stem

There were lots of weedy late-summer native plants producing seeds and fruits along the route...

False climbing buckwheat (Polygonum scandens)

Bur-cucumber (Sicyos angulatus)

The trail heading north along the west bank of the creek flowing about 20 feet below.

The creek photographed downstream

...and there was no shortage of non-native invasive plants, too, in addition to the Aralia.

Mile-a-minute weed (Polygonum perfoliatum) with blue seeds favored (and spread) by birds

Japanese knotweed (Fallopia japonica)

Porcelain-berry (Ampelopsis brevipedunculata) - the bane of my professional existence

Autumn was just beginning to make its advent apparent in the trailside foliage.

Flowering dogwood leaves (Cornus florida) on the woodland edge are turning maroon

Great Blue Heron fishing the creek's shallows

Several groups of skittish Wood Ducks in autumn eclipse plumage were cruising the creek.  I captured the image below with my telephoto lens extended to its maximum, and then I further enlarged and sharpened the image digitally, so the quality is not great, but it was the best I could get.  When enlarged, I think the image looks a little Impressionistic as a result of my manipulations.  Wishful thinking...?  What do you think?

Wood Ducks on the creek

The creek at the north end of our walk