244 UNIVERSITY OF MISSOURI STUDIES [394 



encelioides exauriculata Rob. & Greenm. ; Xlmenesia 

 exauriculata (Rob. & Greenm.) Rydb.]. WESTERN 



CROWNBEARD. 



Boulder (Rydberg). In great abundance near Lafayette 

 (Cockerell). 

 MONTANA to TEXAS and ARIZONA. 



460. BIDENS L. BUR-MARIGOLD. 



1 122. B. vulgata Greene. COMMON STICKTIGHTS. 



Along ditches and in low grounds, 5100-5500 ft. (Daniels, 

 788). 



ONTARIO to BRITISH COLUMBIA ; NORTH CAROLINA to CALI- 

 FORNIA. 



1123. B .glaucesens Greene. GLAUCESCENT BUR-MARIGOLD. 

 Along ditches and streams and in swales, 5100-5500 ft. (Dan- 

 iels, 667). Hardly glaucescent as it occurs about Boulder. 



SASKATCHEWAN to MONTANA; KANSAS to COLORADO. 



1123^. B. tenuisecta Gray. WESTERN SPANISH NEEDLES. 

 Marshall lake (W. W. Robbins). 

 COLORADO to IDAHO ; TEXAS to ARIZONA and MEXICO. 



461. THELESPERMA Less. 



1124. T. gracile Gray. SLENDER THELESPERMA. 

 Common on the plains and mesas, and occurring also on the 



open mountain slopes, 5100-9000 ft. (Daniels, 233). Also 

 between Sunshine and Ward (Rydberg). 



NEBRASKA to COLORADO; MISSOURI and TEXAS to ARIZONA. 



462. PICRADENIOPSIS Rydb. 



1125. P. oppositifolia (Nutt.) Rydb. [Bahia oppositifolia 

 Nutt.]. OPPOSITE-LEAVED BAHIA. 



Boulder (Rydberg). 



SOUTH DAKOTA to MONTANA; TEXAS to ARIZONA. 



463. BAHIA Lag. 



1126. B. dissecta (Gray) Britton [B. chrysanthemoides Gray]. 

 FINE-LEAVED BAHIA. 



Infrequent along canons, 6000-9000 ft. (Daniels, 719). Also 



