Mid-September Wildflowers

Old Colchester Preserve, Woodbridge/Occoquan, VA

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A pretty picture to start-off today’s field work.

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Virginia Dayflower, Commelina virginica.

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Asiatic Dayflower, Commelina communis.

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Tickseed Sunflower, Bidens polylepis.

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Marsh Dewflower, Murdannia keisak.

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Ground Nut (wild bean), Apios americana seedpods.

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Sneezeweed, Helenium autumnale.

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Wingstem, Verbesina alternifolia.

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Pa Paw (ripe fruit), Asimina triloba.

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Purple Gerardia (Purple False Foxglove), Aglinis purpurea.

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Common Dodder, Cuscuta gronovii.  We also saw Climbing Hempweed, Mikania scandens and Virgin’s Bower, Wild Clematis, Clematis virginiana in flower.

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In the high marsh we observed Walter’s Millet, Echinochloa walteri (FACW+).  Walter’s Millet is also known as Walter’s Barnyard Grass, Swamp Barnyard Grass and Coast Cockspur Grass.

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This four to six-foot tall, annual native is in flower (inflorescence) from August through October, and occurs throughout the northeast.

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The plant is found in fresh tidal marshes and is fairly common in Maryland and Virginia, although endangered in Pennsylvania.  It looks similar to Barnyard Grass, E. crusgalli but is more robust, larger and has spike-lets with long bristles, often over an inch long, kind of like Barnyard Grass, but on steroids.

 

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