(205 ) 
Type locality: San Luis Potosi. 
Distribution: San Luis Potosi and Hidalgo. 
yO. VERNONIA GREGG A. Gray, Proc. Am. Acad. 17: 204. 
1882 
Vernonia Greggiit Palmeri A. Gray 1. c. 
Erect, simple to the inflorescence; stem strongly striate, puber- 
ulent or glabrate ; leaves firm, oblong-lanceolate, 8-ro cm. long, 
neath, with a prominent midvein, sessile or very short-petioled ; 
upper leaves gradually smaller; heads large, many-flowered, on 
subulately bracted peduncles; involucre hemispheric or broadl 
campanulate, 8-10 mm. high; scales aaa lanceolate or lanceo- 
late, acuminate, glabrous: achenes 5 m ong, sparsely puberu- 
lent, sharply ribbe d; pepus gs i, mm. long. 
e locality : ‘« Northern Mexi 
Distribution : pe Pringle ee Palmer 753. 
(iii) Species-group Crizitae 
Heads very large, many-flowered, relatively few in number; 
scales narrowly acuminate or filiform; leaves linear or narrowly 
lanceolate. One Sonoran species in northwestern Mexico and an 
Ozarkian species in the United States. 
71. VERNONIA BoLLEeANA Sch.-Bip. Bot. Voy. Herald, 297. 
Stem nearly terete, floccose, simple; leaves numerous, thick, 
narrowly linear, 6-8 cm. long, 3 mm. wide, glabrous and dark 
green above, lanate beneath, one-nerved, the margin revolute; heads 
few, many-flowered, on peduncles 4-6 cm. long; involucre tur- 
mm. 
mature achenes densely canescent, staal ribbed; pappus nearly 
white, 8 mm. long, the outer series distinc 
Type locality and distribution: Sierra eae Mexico. 
The single specimen examined is in the Gray Herbarium, col- 
lected by Seemann in northwestern Mexico, and probably a cotype 
or fragment of the original. It is about 4 dm. high, and bears 
three heads. 
