Click on image to enlarge.

Title: Information Sheet, Chesapeake & Ohio Canal National Historical Park, 10 April 2004

Chesapeake & Ohio Canal National Historical Park, Maryland, U.S.A., 10 April 2004

---

On 10 April 2004, the Botanical Society of Washington, energetically led by Dr. Dan H. Nicolson (Smithsonian Institution), enjoyed a delightful day at the Chesapeake & Ohio Canal National Historical Park, about 10 miles north of Washington, D.C.   We saw many blossoming wildflowers in the spectacular natural garden along the Potomac River.

Dan has been leading his annual plant-appreciation walks for decades.

---

For more information about the Chesapeake & Ohio Canal National Historical Park on this Website, please visit the Grand Information Page regarding the Park.

---

Descriptions of the images are below this image patch.





Figure 1.   Alliaria petiolata (Garlic Mustard, Brassicaceae, aggressive alien invasive).   Alliaria petiolata is in leaf only.   The pink flowers are those of Claytonia virginica (Spring Beauty, Portulacaceae).

Figures 2–4.   Allium tricoccum (Wild Leek, Alliaceae).

Figure 5.   Amelanchier arborea (Common Serviceberry, Rosaceae).



Figures 6–7.   Amelanchier arborea (Common Serviceberry, Rosaceae).

Figure 8.   Arabis laevigata (Smooth Rockcress, Brassicaceae).

Figures 9–10.   Berberis thunbergii (Japanese Barberry, Berberidaceae).



Figures 11–13.   moss (Phylum Bryophyta).

Figure 14.   Cardamine hirsuta (Winter Cress, Brassicaceae).

Figure 15.   Carex sp. (sedge, Cyperaceae).



Figures 16–17.   Carex sp. (sedge, Cyperaceae).

Figure 18.   Chaerophyllum procumbens (Spreading Chervil, Apiaceae).

Figures 19–20.   Claytonia virginica (Spring Beauty, Portulacaceae).   Flowers of this species show marked variablity.



Figure 21.   Claytonia virginica (Spring Beauty, Portulacaceae, white through pinkish flowers) and Viola sonoria (= Viola cuculata, Common Blue Violet, Violaceae, blue-violet flowers).

Figures 22–24.   Claytonia virginica (Spring Beauty, Portulacaceae).   Flowers of this species show marked variablity.

Figure 25.   “It could be here somewhere.”



Figure 26.   “I think that we’ll find it.”

Figure 27.   “Eureka! It’s here.”

Figures 28–30.   Dan amazed us with the new species of heat-tolerant Frullania (liverwort, Bryophyta) that grows on his engine block.



Figure 31.   Dan amazed us with the new species of heat-tolerant Frullania (liverwort, Bryophyta) that grows on his engine block.

Figures 32–35.   A fallen Quercus sp. (oak, Fagaceae) with large encapsulated wounds.



Figure 36.   Platanus occidentalis (Eastern Sycamore, Platanaceae) with patchy bark of light and dark areas.

Figure 37.   A view of the forest.

Figure 38.   Corydalis flavula (Pale Corydalis, Fumariaceae).

Figure 39.   Dentaria heterophylla (Slender Toothwort, Brassicaceae).

Figure 40.   Dirca palustris (Leatherwood, Thymelaeaceae).




Figures 41–42.   Dirca palustris (Leatherwood, Thymelaeaceae).

Figures 43–44.   Erigenia bulbosa (Harbinger of Spring, Apiaceae)

Figure 45.   Erythronium americanum (Yellow Trout Lily, Liliaceae).



Figures 46–50.   Erythronium americanum (Yellow Trout Lily, Liliaceae) with a pollinating Andrena sp. (mining bee, Andrenidae).



Figures 51–52.   Erythronium americanum (Yellow Trout Lily, Liliaceae).

Figure 53.   Erythronium americanum (Yellow Trout Lily, Liliaceae) with a mating pair of soldier beetles (Cantharidae).

Figure 54.   Erythronium americanum (Yellow Trout Lily, Liliaceae).

Figure 55.   Frullania (liverwort, Bryophyta).



Figures 56–57.   Frullania (liverwort, Bryophyta).

Figure 58–60.   Jeffersonia diphylla (Twinleaf, Berberidaceae).



Figure 61.   Jeffersonia diphylla (Twinleaf, Berberidaceae).

Figures 62–65.   Mertensia virginica (Virginia Bluebells, Boraginaceae).



Figure 66.   Oxalis violacea (Violet Wood Sorrel, Oxalidaceae).

Figures 67–69.   Sanguinaria canadensis (Bloodroot, Papaveraceae).

Figure 70.   Sedum ternatum (Wild Stonecrop, Crassulaceae).



Figure 71.   Sedum ternatum (Wild Stonecrop, Crassulaceae).

Figures 72–74.   Stellaria pubera (Star Chickweed, Caryophyllaceae).

Figure 75.   Urtica dioica (Stinging Nettle, Urticaceae, alien species)



Figure 76.   Viola pennsylvanica (Smooth Yellow Violet, Violaceae) and Claytonia virginica (Spring Beauty, Portulacaceae, pink flowers).

Figures 77–78.   Viola sororia (Common Blue Violet, Violaceae) and Claytonia virginica (Spring Beauty, Portulacaceae, pink flower).

Figure 79.   Viola striata (Pale Violet, Violaceae, white flowers), Claytonia virginica (Spring Beauty, Portulacaceae, pink flower), and Phlox divaricata (Woodland Phlox, Polemoniaceae, light violet flower).

Figure 80.   Zizia aurea (Golden Alexanders, Apiaceae).



Figures 81–84.   On the way to our field trip, I found a group of Coragyps atratus (Black Vulture, Cathartidae) that were consuming an Odocoileus virginianus (White-tailed Deer, Cervidae), evidently killed by a motor vehicle.



update template
�Copyright 2009 Georgetown University