253] FLORA OF COLUMBIA AND VICINITY III 



224. O. Virginica L. 



Yards and streets; frequent. 



New York to Nebraska; Florida to Texas. 



77. TRADESCANTIA L. Spiderwort. 



225. T. brevicaulis Raf. [T. Virginica villosa Watson]. 

 Hairy spiderwort. 



Dry thickets and barren fields. 

 Illinois and Tennessee to Missouri. 



226. r, Virginica L. \T. VirgimanaL.'\. Common spider- 

 wort. 



Common in oak woods, thickets, half-wild fields, and road- 

 sides. 



New York to South Dakota; Virginia to Arkansas. 



227. T. reflexa Raf. 

 Rich hillsides. 



Michigan and Minnesota to Florida and Texas. 



228. T. pilosaLehm. [T. Virginica^ejcuosa{Rai.)VJatson'l. 

 Rich hillsides about limestone cliffs and ledges. 

 Pennsylvania and Missouri to Florida. 



Family 15. PONTEDERIACEAE Dumort. Pickerel- 

 weed family. 



78. HETERANTHERA Ruiz. & Pav. Mud plan- 

 tain. 



229. H. reniformis Ruiz & Pav. 

 Margins of ponds; local. 



Connecticut to Kansas; Louisiana and Texas to South 

 America. 



Order 10. LILIIFLORALES. 



Family 16. JUNCACEAE Vent. Rush family. 



79. JUNOUS L. Rush. 



230. J. marginatus Rostk. 

 Marsh meadows; common. 



Maine and Ontario to Nebraska and Florida. 



