I98 UNIVERSITY OF MISSOURI STUDIES [346 



358. COIXOMIA Nutt. 



838. C. linearis Nutt. [Gilia linearis (Nutt.) Gray]. Nar- 

 row-leaved Collomia. 



Very common throughout in shady or half-shady places, 

 especially on creek sands, 5100-9000 ft. (Daniels, 51). Also 

 at Ward (Rydberg). 



North Dakota and Manitoba to British Columbia; Ari- 

 zona to California ; introduced eastward. 

 838a. C. linearis Boulderensis Daniels. Nov. var. 



Leaves narrower than in the type, sharply acuminate ; flower- 

 clusters densely capitate, the calyx-lobes and the bracts strongly 

 pungent ; a dwarfish form, blossoming earlier than the type. 

 Near Gilia linearis subulata Gray. 



Plains about Boulder, 5400-5700 ft. (Daniels, 60). 



359. POLEMONIUM L. Jacob's ladder. Greek va- 

 lerian. 



839. P. pulcherrimum Hook. Fairest Jacob's ladder. 

 Arapahoe Peak above timberline, 11000-12000 ft. (Daniels, 



1021). Also from Eldora to Baltimore, and in the mountains 

 between Sunshine and Ward, Brand makes this species a 

 synonym of the next. 

 Colorado. 



840. P. delicatum Rydb. Delicate Jacob's ladder. 



At timberline (or just below) under shrubs, Arapahoe Peak, 

 10500-11500 ft. (Daniels, 872). 

 Colorado and New Mexico. 



841. P. molle Greene. Soft Jacob's ladder. 

 Eldora to Baltimore (Rydberg). 

 Colorado. 



842. P. robustum Rydb. Stout Greek valerian. 

 Boulder creek near Falls, 6500-7500 ft. (Daniels, 296). 

 Colorado. 



843. P. mellitum (Gray) Greene [P. confertum mellitum 

 Gray]. Yellow Greek valerian. 



Eldora to Baltimore (Rydberg). 

 Wyoming and Colorado to Nevada. 



