CARDUACEAE. 335 



Tribe g. CYNAREAE. 

 One genus. 88. Carduus. 



Tribe i. VERNONIAE. 

 I. VERNONIA Schreb. Iron Weed. 



I. Vernonia Jamesii T. & G. (V. marginata (Torn) Britton) On plains 

 from Neb. and Colo, to Ark. and Tex.—" On the Arkansas." 



Tribe 2. EUPATORIAE. 



2. EUPATORIUM L. Joe-Pye Weed, Thorough-wort. 



Leaves verticillate in whorls of threes. 



Leaves ovate, acute. i. B. maculatum. 



Leaves lanceolate, acuminate. ^. E. Bruneri. 



Leaves opposite. 3. B. texense. 



1. Eupatorium maculatum L. In moist soil from N. Y. and B. C. to Ky. 

 and N. M.- — Along river east of Ft. Collins. 



2. Eupatorium Bruneri A. Gray. {Eupatorium Rydbergii Britton) In 

 moist soil from Iowa, Sask. and B. C. to Colo, and Utah. — Alt. 4000-5000 ft.— 

 Caiion City ; Ft. Collins ; La Poudre near La Porte. 



3. Eupatorium texense (T. & G.) Rydb. (£. ageratifolium texense T. & 

 G. ; E. ageratifolium A. Gray, mainly; not DC.) Rocky hills from Colo, to 

 Tex. and Ariz. — Alt. 7000-8500 ft. — Caiion City; Box Caiion, west of Ouray; 

 Trail Glen. 



3. KUHNIA L. 



Leaves oblong or lanceolate, 3-ribbed, more or less toothed. 



Bracts narrowly linear, acuminate. i. K. Hitchcockii. 



Bracts linear, abruptly acute. is. K. gluiinosa. 



Leaves linear, i -ribbed, entire. 3. K. Goodingii. 



1. Kuhnia Hitchcockii A. Nelson. Plains of Kans. and Colo. — Alt. 4000- 

 5000 ft. — Denver. 



2. Kuhnia glutiuosa EU. {K. eupatorioides corymbulosa T. & G.) On dry 

 prairies and plains from Ills, and Mont, to Ky. and Colo. — Alt. about 5000 

 ft. — Boulder; New Windsor; Ft. Collins; Spring Caiion. 



3. Kuhnia Goodingii A. Nels. On rocky hills and plains from Colo, to 

 Tex. and Ariz. — Alt. 4000-7000 ft. — Engelmann Caiion; Granite; Manitou; 

 Durango; Hotchkiss; Pagosa Spring. 



4. COLEOSANTHUS Cass. 



Leaf-blades ovate or deltoid. 



Leaves slender-petioled, not spinulose-toothed ; bracts thin, 2 mm. or less wide. 

 Heads 30-so-flowered. 



Leaves thin, minutely puberulent ; teeth usually broadly triangular, acute ; 

 peduncles usually longer than the heads. i. C. grandHlorus. 



Leaves thick, densely scabrous-pubescent, very veiny ; teeth rounded-ovate, 

 obtuse or mucronate ; peduncles shorter than the subumbellate heads. 



2. C. umbellatus. 

 Heads io-z5-flowered. 



