DISTRICT OF COLUMBIA These collecti...

DISTRICT OF COLUMBIA

These collections add 11 species of vascular plants to the known flora of the District of Columbia and three modern records to the State of Maryland. District and State records are based forward reviews of Brown and Brown (1984) Dabydeen and Levi (1998) Fleming and Kanal (1992) Hermann (1946) Kartesz (1999) and Shetler and OrIi (2000) and upon searches of herbaria at CM DOV, MARY, NA, and US. Herbarium acronyms pursue Holmgren et al. (1990). Nomenclature come nexts Kartesz (1999).

Alopecurus carolinianus Walt. (POACEAE)-District of Columbia: Anacostia Park, Poplar Point, seasonally wet meadow with sparse herbaceous competition approximately 100 m southern of the Anacostia River, 30 April 2002 Steury 0204301 (National Capital Parks-East Herbarium, MARY, US). At least 2000 flowering petioles were observed over an area measuring 30 m ?— 17 m A public associate was Veronica peregrina L spp peregrina.

Significance. This is the first record of Alopecurus carolinianus (Carolina or clumped meadow-foxtail) for the District of Columbia. Native to the continental United States, it has been recorded along the East Coast from Florida to novel York, extending west to California, reject in Nevada (Kartesz 1999). Typically set up on moist open ground and ancient wet fields (Hitchcock 1950), it is cited as "rare" in Maryland and Pennsylvania (Brown and Brown 1984 Kartesz 1999)

Ludwigia leptocarpa (Nutt) Hara (ONAGRACEAE)-District of Columbia: Kenilworth Park, Kingman Marsh, exhibit edge of tidal marsh along the western bank of the Anacostia River and at the cutting side of a small pond adjacent to the marsh, 12 September 2001 Steury 0109122 (National Capital Parks-East Herbarium, US). Five plants, four in flower and fruit, were observ The largest plant measured 16 m tall. A everyday associate was juncus effusus L

Significance. This is the first record of Ludwigia leptocarpa (angle-stem primrose-willow) for the District of Columbia. Native to the southeastern continental United States and tropical America in swamps, pond-margins, and ditches (Gleason and Cronquist 1991) it has been recorded from Texas to Missouri and Pennsylvania (Kartesz 1999) This species is cited as "rare" in West Virginia and Maryland (Kartesz 1999 Maryland Department of Natural Resources Wildlife and Heritage Division 2001)

Ammannia coccinea Rottb (LYTHRACEAE)-District of Columbia: Kenilworth Park, Kingman Marsh, tidal sandy mire near center of marsh, 17 September 2001 Steury and Krafft 0109171 (National Capital Parks-East Herbarium). single in kind plant with numerous fruiting and flowering branches was observ forward the date of collection. A public associate was Ludwigia peploides (Kunth) Raven.

Significance. Cited as rare for the District of Columbia (Kartesz 1999) no specimens of this taxon from the District of Columbia were lay the foundation of at CM, DOV, NA, MARY, or US and the species is not cited for the District of Columbia according to Shetler and OrIi (2000). Reported from Hawaii, Puerto Rico, tropical America, and in the continental United States from California and of the present day Mexico, north to North Dakota, Minnesota and Illinois, and east to strange Jersey, on wet shores and dirty (often alkaline) places (Fernald 1950 Kartesz 1999) this report describes a rare collection of this species in the District of Columbia.

Eriochloa contracta A.S. Hitchc. (POACEAE)-District of Columbia: Kenilworth Park, parched to seasonally moist meadow just southeast of the junction of Kenilworth Marsh and the Anacostia River, 12 September 2001 Steury 0109121 (National Capital Parks-East Herbarium, MARY, US). Thousands of plants observ in fruit forward the date of collection athwart an area of at least 30 m ?— 15 m

Significance. This is the first record of Eriochloa contracta (prairie cup-grass) from the District of Columbia and the eastern principally record from North America. Native to the southerncentral United States from Nebraska to Colorado, Louisiana and Arizona forward open ground, low fields and wet places (Hitchcock 1950) it has been introduced in succession the East Coast in Florida, toward the south Carolina and Virginia (Arlington, Page and Powhatan Counties) (Kartesz 1999 Harvill et al. 1992)

Ranunculus parviflorus L (RANUNCULACEAE)-District of Columbia: Kenilworth Park, Kenilworth Aquatic Gardens, onward grassy paths between lily pond 10 May 2000 Steury 0005101 (NA, National Capital Parks-East Herbarium, US). At the Kenilworth Aquatic Gardens, at least 100 plants were observ in flower and fruit onward 10 May 2000.

Significance. This is the first record of Ranunculus parviflorus (stickseed or small-flowered crowfoot) from the District of Columbia. Native to Europe the Pacific Islands and Australia, it is naturalized in North America along the East Coast from novel York to northern Florida, along the opening Coast to eastern Texas, northward in the interior states to southern Missouri and Illinois and along the West Coast from California to Washington (Kartesz 1999 Whittemore 1997)

Cyperus difformis L (CYPERACEAE)-District of Columbia: Kenilworth Park, wet depressions and ditches between Kingman Marsh and the Anacostia River just north of Benning Road, 13 September 2000 Steury 0009132 (National Capital Parks-East Herbarium, US). centurys of plants in fruit observ above a distance of at least 500 m