Bulletin - United States National Museum - Smithsonian Institution

132 FLORA OF WASHINGTON AND VICINITY.
Aristida purpurascens, Poir.
Little Falls (Dr. Vasey).
'Spartina cynosuroides, Willd. Fresh-water Cord-Grass.
Flats under Cliain Bridge. August.
Gymnopogon racemosus, Beauv. Naked-beard Grass.
Last half of September.
Cynodon Daciylon, Fers. Bermuda-Grass. Scutch-Grass.
All my efforts to find developed grains have thus far proved unavailing. July.
tUletisine Indica, Gaertn. Crab-Grass. Yard-Grass.
July.
Tricuspis seslerioides, Torr. Tall Red-top.
August.
i 'Dactylis glomerata, L. Orchard-Grass.
Middle of May. J
Xatonia Pennsylvanica, Gray.
Varies much in appearance, there being a wood-form with slender culms and very
short upper leaves, and a meadow-form much taller and stouter, with the panicle i
partly included and upper leaves flat, 5"" wide and nearly a decimeter in length.
Last half of May.
Melica mutica, Walt. Melic-Grass.
Last of April or first of May.
Glyceria nervata, Trin. Manna Grass. Fowl Meadow-Grass.
Last of May. «
Glyceria aquatica, Smith. Reed Meadow-Grass,
Terra Cotta Swamp. Last of June or first of July.
Glyceria fluitans, R. Br.
Broadwater; found only in one of the many pools among rocks. July 6, 1879,
late; should bo collected in June.
iPoa annua, L. Low Spear-Grass.
Last of April or first May.
tPoa compressa, L. Wire-Grass.
Last of May or first of June.
Poa compressa, L., var. gracilis (Oakes?).
Habit very unlike that of the type, and more certainly indigenous. First half
of June. (
tPoa pratensis, L. Common Meadow-Grass. Kentucky Blue Grass.
Middle to end of May.
Poa trivialis, L. Roughish Meadow-Grass.
Last half of May.
Poa sylvestris. Gray.
Last half of May.
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