88 UNIVERSITY OF MISSOURI STUDIES [236 



Family 17. PONTEDERIACEAE Dumort. Pickerel-weed 

 family. 



85. HETERANTHERA Willd. Mud plantain. 

 235. H. limosa (Sw.) Willd. Limose mud plantain. 

 Between Longmont and Loveland, 5100-5500 ft. (Ryd- 

 berg), in shallow water or mud. 



Virginia to Nebraska and Colorado; Florida to Mexi- 

 co, the West Indies, and Central America. 



Order 12. LILIALES. 

 Family 18. MELANTHACEAE R.Br. Bunch-flower family. 



86. AUTICLEA Kunth. Zygadenus. 



235^. A. elegans (Pursh) Rydb. [Zygadenus elegans 

 Pursh]. Showy zygadenus. 

 Redrock lake, loioo ft. (Ramaley). 

 Saskatchewan to Alaska; Colorado to Nevada. 



236. A. Coloradensis Rydb. Colorado zygadenus. 



In canons and subalpine meadows, locally abundant, 7000 

 (Bear Canon) -12000 ft. (Daniels, 651). 

 Colorado and New Mexico to Utah. 



87. TOXIC OSCORDION Rydb. Poison camass. 



237. T. gramineum Rydb. Death camass. 



Mesas and foothills; blossoming in June, 5800-7000 ft. 

 (Daniels, 106). 



Saskatchewan to Idaho and Colorado. 



238. T. falcatum Rydb. Falcate poison camass. 

 Spruce forests along Bear Canon, 6000-7500 ft. (Daniels 



759)- 

 Colorado. 



Family 19. JUNCACEAE Vent. Rush family. 



88. JUNCUS L. Rush. 



239. J. Balticus montanus Engelm. Mountain Baltic rush. 

 Along ditches and in swales and wet meadows, 5100-11000 



ft. (Daniels, 379). 



Labrador to Washington, Colorado, and Utah. 



