PI.ANTS OF THE ARAPAHOE FOREST 
73 
S. Bigelovii Hallii Gray. Camp Uray on Grand river. 
S. eremophilus Rich. Camp Uray on Grand river; Spruce creek; Speci- 
men Mountain, 11,500 feet. 
S. hlitoides Greene. Berthoud Pass, 10,500 feet; common near high- 
way. 
S. triangularis Hook. Specimen Mountain, 11,500 feet; beaver bog on 
westi fork of St. Louis creek, 9,000 feet; Mount Byers. 
S. amplectens Gray. West fork of St. Louis creek. 
S. perplexus Nels. (S. lugens in part) West fork of St. Louis creek. 
Hieracium albiflorum Hook. Specimen Mountain, 11,500 feet. 
Lactuca virosa L. (L. scariola integrata) Manitou; a common in- 
troduced, noxious weed. 
Troximon purpureum (Gray) Nels. Camp Uray on Grand river; Spruce 
creek. 
T. arisonicum Greene. Milner Pass, 10,700 feet; Mount Byers, 10,500 
feet; Specimen Mountain, 12,000 feet. 
Cirsium megacephalum (Gray) Cockerell. Golden; in woods. 
C. eriocephalum Gray. Specimen Mountain, 12,000 feet; Berthoud 
Pass. 
C. Drumntondii T. & G. Grand river. 
C. foliosum (Hook) DC. Specimen Mountain, 9,000 to 10,000 feet; 
mountain parks. 
