POXTEDERIACEAE 13 



2. Smilax glauca Walt. 

 Republican River near Franklin. 



3. Smilax hispida Muhl. Green Brier. 

 Common in woods all over the state. Crete; Grand Island; Lincoln; 

 Omaha; St. James; Tecumseh; Weeping Water. 



2. PONTEDERIACEAE. 

 Heteranthera. 243. 



Leaves rounded, petioled. 



Spathe several flowered. 1. H. reniformis. 



Spathe 1 flowered. 2. H. limosa. 



Leaves linear, sessile. 3. H. dubia. 



1. Heteranthera reniformis R. & P. 

 Nebraska, according to Britton's Manual. 



2. Heteranthera limosa (Sw.) Willd. 



Common in mud or shallow water. Fairmont; Lincoln; Minden; 

 Plainview; Sheridan County. 



3. Heteranthera dubia (Jacq.) Mac. M. 



Submerged aquatic of still water. Elm Creek; Glen Rock; Kearney; 

 Xeligh. 



3. CO MM EL I N AC E A E. 



Petals unequal, perfect stamens 3 or 2. 1. Commeiina. 



Petals equal, perfect stamens 6 or 5. 2. Tradescantia. 



1. Commeiina. 239. 

 Sheaths glabrous or nearly so. 1. C. crispa. 



Sheaths hirsute. 2. C. virginica. 



1. Commeiina crispa Wooton. 

 Nebraska, according to Britton's Manual. 



2. Commeiina virginica L. 



In the sand-hill regions. Knox County; Long Pine; Sheridan; Thed- 

 ford. 



2. Tradescantia. 240. 



Flowers 1 to 5 cm. broad. 1. T. scopulorum. 



Flowers 2 to 3 cm. broad. 



Bracts lanceolate, broader than the leaves. 2. T. bracteata. 



Bracts linear, narrower than the leaves. 3. T. occidentalis. 



1. Tradescantia scopulorum Rose. 

 Thedford. 



2. Tradescantia bracteata Small. 



Ainsworth; Callaway; Ewing; Inman; Lincoln; Red Cloud. 



3. Tradescantia occidentalis Britton. 



Common all over the state. Anselmo; Central City; Box Butte County; 

 Kearney; Lincoln; Newcastle; Pine Ridge; Thedford. 



4. JUNCACEAE. 

 Juncus. 244. 



Inflorescence apparently lateral. 



Perianth green or straw-colored, seeds 0.5 mm. long. 1. J. filiform is. 



