92 NORTH AMERICAN FLORA [VOLUME 33 
puberulent on the back, arachnoid-ciliate, purple, the outer triangular-ovate, the inner oblong, 
sharply acute to acuminate; achenes glabrous, prominently ribbed, resinous in the furrows, 
5 mm. long; pappus purple, the inner bristles 6-7 mm. long, the outer series similar but shorter. 
TYPE LOCALITY: Arkansas River [Oklahoma or Kansas]. 
DISTRIBUTION: Kansas, Oklahoma, Texas, and New Mexico. 
ILLUSTRATIONS: Britt. & Brown, Ill. Fl. f. 3608; ed. 2. f. 4143. 
114. Vernonia tenuifolia Small, Bull. Torrey Club 25: 145. 1898. 
Stems erect, simple to the inflorescence, 5-10 dm. tall, glabrous; leaves numerous, the 
blades firm, linear or narrowly lanceolate, 5—9 cm. long, 3-8 mm. wide, acute, sharply and 
remotely dentate to entire, l—nerved, essentially glabrous, impressed-punctate beneath, 
sessile; inflorescence 5-10 cm. broad, flattened, bearing relatively few 21-flowered heads; 
involucre broadly campanulate, 8 mm. broad, 7-9 mm. high, purple; scales appressed, re- 
gularly imbricate in 4 or 5 series, glabrous or nearly so, acute or mucronate, the outer ovate, 
the inner oblong, 2—2.5 mm. wide; achenes glabrous, resinous in the furrows, 4 mm. long; 
pappus purple to tawny-purple, the inner bristles 7-8 mm. long, the outer series similar but 
shorter. 
TYPE LOCALITY: Texas. 
DISTRIBUTION: Texas. 
115. Vernonia corymbosa Schw. in Keating, Narr. Exp. 
Long 2: 394. 1824. 
Vernonia Schweinitzii Steud. Nom. Bot. ed. 2.2: 755. 1841. 
Vernonia fasciculata corymbosa Daniels, Univ. Missouri Stud. Sci. 1: 403. 1907. 
Stems erect, usually red, 4-8 dm. high, glabrous; leaf-blades firm, pale-green, erect or 
ascending, sessile, ovate-lanceolate, 4-7 cm. long, 1—2.5 cm. wide, acute, regularly serrate 
with low teeth, somewhat scabrous above, especially near the margin, glabrous and deeply 
pitted beneath, pinnately veined; inflorescence hemispheric, very dense, 4-6 cm. broad; 
heads sessile or short-peduncled, 21-flowered; involucre broadly campanulate to hemispheric, 
8 mm. high; scales regularly imbricate, appressed, purple, ovate-oblong, glabrous or thinly 
ciliate, rouded to obtuse or subacute, the inner 2.5—3 mm. wide; achenes 3.5 mm. long, glabrous, 
resinous in the furrows; pappus purple, the inner bristles 6-7 mm. long, the outer series similar 
but shorter. 
TYPE LOCALITY: Northwestern Territory. 
DISTRIBUTION: Manitoba, Minnesota, North Dakota, and South Dakota. 
116. Vernonia acaulis (Walt.) Gleason, Bull. N. Y. Bot. 
Gard. 4: 222. 1906. 
Chrysocoma acaulis Walt. Fl. Car. 196. 1788. ° 
Vernonia oligophylla Michx. Fl. Bor. Am. 2: 94. 1803. 
Cacalia acaulis Kuntze, Rev. Gen. 968. 1891. 
Stems 3-10 dm. tall, glabrous or thinly puberulent, leafy at base, simple to the inflorescence; 
basal leaf-blades oblong to obovate, 10-30 cm. long, 2-8 cm. wide, acute, coarsely and irregularly 
serrate, attenuate at base into a short petiole, sparsely pubescent or scabrellate above, nearly 
glabrous and glandular-dotted on the lower surface, and pubescent along the veins; cauline 
leaves much smaller, bractlike, linear-oblong; inflorescence freely branched, loose and open, 
1-3 dm. broad, with few 34-flowered heads; involucre broadly campanulate to hemispheric, 
5-7 mm. high; scales glabrate or puberulent on the back, thinly arachnoid-ciliate, not resinous, 
the outer closely appressed a¢ base, caudate-acuminate to a filiform tip, the inner erect, acute 
to acuminate; achenes strongly ribbed, sparsely pubescent, resinous and dark-dotted, 3 mm. 
long; pappus pale-tawny, the bristles 5 mm., the scales 0.4-0.8 mm. long. 
TYPE LOCALITY: South Carolina. 
DISTRIBUTION: North Carolina, South Carolina, Georgia, and Florida. 
117. Vernonia georgiana Bartlett, Rhodora 12: 172. 1910. 
Stems herbaceous, erect, 2-10 dm. tall, simple to the inflorescence, green or purple, 
puberulent; basal leaves lanceolate, 5-15 cm. long, 1-2 em. wide, acute or obtuse, denticulate, 
