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42. VERNONIA CRINITA Raf. New Fl. N. Am. 4: 77. 1836 
Vernonia arkansana DC. Prodr. 7: 264. 
Stem erect, simple or ieee cae iek leat, peut _ 
somewhat glaucous, or minutely puberulent, striate, . hi 
leaves sagen narrowly ee or broadly i 8-15 cm. 
long, o. cm. wide, acuminate, tapering at the base, entire or. 
with ae scattered callous teeth, glabrous or sparingly pubescent ; 
inflorescence irregular, with 5-40 heads; peduncles stout, thickened 
above, frequently pubescent; heads 55-89-flowered; involucre 
long flexuous tips about ae the pappus; achenes strongly 
ribbed, glabrous or nearly so, 5-6 mm. long; pappus dull- ae 
—7 mm. long. 
Type locality: ‘‘In Louisiana and Arkanzas.” 
Distribution: Missouri, Kansas, Arkansas and Indian Territory. 
Specimens agreeing with this description are very numerous in 
herbaria and correspond most closely with Rafinesque’s original 
description. The species is very variable in the length and pubes- 
cence of the involucral scales, the pubescence and serration of the 
leaves and the general habit. Forms occur apparently intermediate 
with other species and have been regarded as hybrids, but since all 
evidence is lacking as to their origin or stability, they can at present 
be mentioned merely as intermediate forms, leaving their final dis- 
posal to future investigation. 
1. V. crintta-missurica. Leaves narrow, minutely but sharply 
serrate, tomentulose-pubescent on the veins beneath; heads smaller 
than in the type; tips of scales much shorter than the pappus and 
little exceeding the involucral cup. Specimens with this habit 
have been collected at St. Louis, Zgger#, Aug. 10, 1886, and 
De Soto, Missouri, Hasse, July 7, 1887. 
2. V. crinita-interior Baldwint. Leaves as in the type, but 
more pubescent, involucre 8-9 mm. high, the scales acuminate, 
short, recurved. Missouri, &. Heald. 
V. crintta-intertor. Leaves as in the type, closely and finely 
tomentose beneath; scales long-acuminate but not filiform, all 
erect, equaling or a little shorter than the pappus; heads 10 mm. 
igh. Choctaw Agency, Indian Territory, 1853-4, Bigelow. The 
plant might almost as well be connected with V. marginata. 
