Bulletin - United States National Museum - Smithsonian Institution

124 FLORA OF WASHINGTON AND VICINITY.
Juncus Canadensis, Gay, var. subcaudatus, Eng.
October.
Juncus Canadensis, Gay, var. longicaudatus, Eug.
August to October.
PONTEDERIACE-ai.
PlCKEREL-WEED FAMILY.
tPontederia cordata, L. Pickerel-weed.
June to August.
t Heteranthera renifonnis, Ruiz & Pav. Mud-Plantain.
August, September.
tSchoUera graminea, Wilkl. Water Star-grass. Yellow-eyed Water-geass.
July.
Commelyna erecta, L. Day-flower.
September.
COMMELYNACE^.
Spiderwort Family.
t Commelyna Virginica, L. Common Day-flower,
High Island. July.
t Tradescantia Virginica, L. Spiderwort.
First half of May.
XYRIDACEiE.
Yellow-eyed Grass Family.
Xyris flexuosa, Muhl. Yellow-eyed Grass. Yellow Flowering Rush.
Railroad cutting near the Reform School (Professor Cbickeriug) ; Holmeajd
Swamp. Last half of Jiily.
Eriocaulon decangulare, L. Pipewort.
ERIOCAULONACE^.
PiPEWORT Family.
This plant has been erroneously distributed by me under the name of E. gnaphal-
odes, Michx. July.
CYPERACE^.
Sedge Family.
Cyperus diandrus, Terr. Galingale. Cyprus Grass.
August, September.
Cyperus diandrus, var. castaneus, Torr.
September.
Cyperus Nuttallii, Torr.
Achenia ash-colored and pitted. Telegraph Road near Bladensburg, October 13,
1878.