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. 



COMMELYNACE^. 



Spiderwort Family. 



Commelyna erecta, L. Day-flower. 



September. 



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. 



ERIOCAULONACE^. 



PiPEWORT Family. 



Eriocaulon decangulare, L. Pipewort. 



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. 



