Bulletin - United States National Museum - Smithsonian Institution
Bulletin - United States National Museum - Smithsonian Institution
Bulletin - United States National Museum - Smithsonian Institution
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FLORA OF \yASHINGTON AND VICINITY. 119<br />
HYDROCHARIDACEiE.<br />
Frog's-bit Family.<br />
Anacharis Canadensis, Planchon. Watkr-weed.<br />
Juno.<br />
tVallisneria spiralis, L. Tape-grass. Eel-grass.<br />
July.<br />
t Orchis spectabilis, L. Showy' Orchis.<br />
May.<br />
ORCHIDACEiE.<br />
Orchis Family.<br />
t Habenaria tridentata, Hook. Rein-Orchis.<br />
August.<br />
Habenaria virescens, Spreng. Green Rein-Orchis.<br />
Hunting Creek ; Eastern Branch Marsh ; rare. Third week in June,<br />
t Habenaria ciliaris, R. Br. Yellow Fringed Orchis.<br />
A single specimen found July 21, 1878, by Prof. M. H. Doolittle, near the Reform<br />
School. Not since seen.<br />
f Habenaria lacera, R. Br. Ragged Fringed Orchis.<br />
Very rare ; found July 3, 1874, near Boundary and Sixteenth streets, July 12, 1879,<br />
in the Terra Cotta region, and June 22, 1881, in Corcoran's Woods ; a single specimen<br />
in each case, the last in good condition.<br />
t Goodyera pubescens, R. Br. Rattlesnake-Plantain.<br />
June or July.<br />
Spiranthes latifolia, Torr. Broad-leaved Ladies' Traces.<br />
A single specimen found May 12, 1878, on the flats below Chain Bridge.<br />
t Spiranthes cernua, Richard. Drooping-flowered Ladies' Traces.<br />
Last of Sejitember.<br />
t Spiranthes graminea, Lindl., var. Walteri, Gray. Grass-leaa^^d Ladies' Traces.<br />
September.<br />
Spiranthes gracilis, Bigelow. Slender Ladies' Traces.<br />
Spikes apparently always twisted in the direction of aright-handed screw. Root<br />
leaves usually gone at flowering time, but found still present with the flowers July<br />
4, 1879, at Great Falls. July to September.<br />
Spiranthes simplex, Gray.<br />
Spikes sometimes twisted to the right and sometimes to the left. Pine woods<br />
near Bladensburg ; rather rare. September.<br />
tPogonia ophioglossoides, Nutt. Snake-Mouth.<br />
A form having leaves 4*= wide was found in the Holmead Swamp, June 13, 1880.<br />
First half of June.<br />
tPogonia verticillata, Nutt. Whorled Snake-Mouth.<br />
Third or fourth week in May.
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