646 CONTEIBUTIONS FKOM THE NATIONAL HEEBAKIUM. 



KEY TO THE SPECIES. 



Leaves lanceolate, tomentose beneath 1 . V. missurica. 



Leaves nan'owly linear-lanceolate, glabrous 2. V. marginata. 



1. Vemonia missurica Raf. Herb. Raf. 28. 1833. 



Vemonia drummondii Werner, Journ. Cincinnati See. Nat. Hist. 16: 171. 1894. 

 Type locality: "In Missouri, ban-ens." 



Range: Kansas and Illinois to Oklahoma, Texas, and eastern New Mexico. 

 New Mexico: Capi tan Mountains (£'arZe 540). 



2. Vemonia marginata (Torr.) Raf. Atl. Journ. 1: 146. 1832. 

 Vemonia altissima marginata Torr. Ann. Lye. N. Y. 2: 210. 1828. 

 Vemonia jaynesii Torr. & Gray, Fl. N. Amer. 2: 58. 1841. 



Type locality: " On the Arkansa ?" 



Range: Kansas and Oklahoma to Texas and southeastern New Mexico. 



New Mexico: Roswell; Buchanan; Quay. Prairies, in the Upper Sonorau Zone. 



2. CARMINATIA Mocino. 



Low slender annual with oi^posite or alternate thin long-petiolate ovate sinuate- 

 serrate leaves; heads racemosely paniculate, cylindric, about 12 mm. high, several- 

 flowered; bracts linear-lanceolate, thin, imbricated, striate; flowers whitish; achenes 

 slender, with pappus of 10 to 18 plumose bristles slightly coherent at the base. 



1. Carminatia tenviiflora DC. Prodr. 7: 267. 1838. 



Type locality: Near Guanajuato, Mexico. 



Range: New Mexico and Arizona to Mexico. 



New Mexico: Kingston; Mogollon Mountains; Florida Mountains; San Luis Moun- 

 tains; Organ Mountains. Canyons, in the Upper Sonoran and Transition zones. 



3. EUPATORIUM L. 



Erect coarse perennial herbs with verticillate, opposite, or alternate, entire or 

 toothed leaves and corymbose heads of whitish or purplish flowers; heads discoid, 

 3 to many -flowered ; involucre cylindric to campanulate, of numerous imbricated 

 bracts; receptacle flat, naked; achenes 5-angled, the pappus a single row of capillary 

 slightly roughened bristles. 



KEY TO the species. 



Leaves verticillate in 3's or 4's; flowers purplish 1. E. bruneri. 



Leaves opposite; flowers white. 



Bracts glabrous; leaves truncate or tapering at the base. . 2. E. rothrockii. 

 Bracts pubescent; leaves usually cordate. 



Heads 3 to 5-flowered; leaves ovate-lanceolate 3. E. solidagini folium. 



Heads 12 to 25-flowered; leaves ovate-cordate. 



Stems woody; leaves less than 15 mm. long; 



pappus and bracts purplish 4. E. wrightii. 



Stems herbaceous; leaves 30 mm. long or more; 

 heads not purplish. 

 Bracts conspicuously nerved, villous and 



ciliate; heads about 7 mm. high 5. E. fendleri. 



Bracts not conspicuously nerved, minutely 



puberulent; heads mostly 5 mm. high. G. E. arizonicum. 



1, Eupatorium bruneri A. Gray, Syn. Fl. 1^: 96. 1884. Joe Pye weed. 



Eupatorium rydbergii Britton, Man. 921. 1901. 

 Type locality: Fort Collins, Colorado. 



Range: British Columbia and Minnesota to Utah and New Mexico. 

 New Mexico: South Fork of Tularosa Creek ( Wooton). Transition Zone. 



