86 NORTH AMERICAN FLORA [VOLUME 33 
TYPE LOCALITY: Mountains near Morales, San Luis Potosi. 
DISTRIBUTION: San Luis Potosi and Hidalgo. 
93. Vernonia Greggii A. Gray, Proc. Am. Acad. 17: 204. 1882. 
Vernonia Greggii Palmeri A. Gray, Proc. Am. Acad. 17: 204. 1882. 
Stems erect, simple to the inflorescence, puberulent or glabrate; leaf-blades firm, oblong- 
lanceolate to narrowly elliptic, 8-10 cm. long, 1.5—2.5 em. wide, broadest at the middle and 
tapering regularly to each end, acute, serrulate, scabrously puberulent above, glabrous and 
black-dotted on the surface and puberulent on the veins beneath, sessile or short-petioled, 
the upper leaves gradually reduced; inflorescence very loose and open, with few many-flowered 
heads on stout, subulately bracted peduncles 1-5 cm. long; involucre hemispheric to broadly 
campanulate, 8-10 mm. high; scales closely imbricate, appressed, glabrous, pulverulent, or 
slightly arachnoid-tomentose, the outer triangular-ovate, sharply acute, the inner elongate, 
acuminate; achenes 4-5 mm. long, essentially glabrous, sparsely resinous in the furrows; 
p2ppus tawny, the bristles 7 mm. long, the scales linear, 1-2 mm. long. 
TYPE LOCALITY: Northern Mexico. 
DISTRIBUTION: Coahuila. 
94. Vernonia texana (A. Gray) Small, Fl. SE. U.S. 1160. 1903. 
Vernonia angustifoliay’T. & G. Fl. N. Am. 2: 59. 1841. 
Vernonia angustifolia texana A. Gray, Syn. F1. N. Am. 1°: 91. 1884. 
Vernonia graminifolia texana Trel.; Brann. & Cov. Rep. Geol. Surv. Ark. 18884: 189. 1891. 
Cacalia angustifolia texana Kuntze, Rev. Gen. 323. 1891. 
Stems erect, simple to the inflorescence, 4-8 dm. tall, glabrous or minutely puberulent; 
leaves firm, ascending, chiefly on the lower portion of the stem, the blades linear-lanceolate, 
6-12 cm. long, 1-2 cm. wide, acute, sharply dentate with low salient teeth to nearly entire, 
attenuate to a sessile base, scabrous above, puberulent, especially along the veins, and usually 
pitted beneath; upper leaves much reduced, bractlike, linear to subulate; inflorescence 1—2 dm. 
wide, open, bearing few 18—21-flowered heads; involucre broadly campanulate, 5-6 mm. 
high; scales irregularly imbricate, appressed or the upper slightly spreading, tinged with 
purple, puberulent or glabrate, acute, the outer ovate, the inner oblong; achenes pubescent 
on the ribs, resinous in the furrows, 2.5 mm. long; pappus tawny, the bristles 6-7 mm. long, 
the scales narrowly linear, 0.8—0.9 mm. long. 
TYPE LOCALITY: Texas. 
DISTRIBUTION: Arkansas, Louisiana, and Texas. 
95. Vernonia Lindheimeri Gray & Engelm. Proc. Am. 
Acad. 1:46. 1846. 
Cacalia Lindheimeri Kuntze, Rev. Gen. 970. 1891. 
Stems erect, simple to the inflorescence, 2-6 dm. high, tomentose or canescent; leaves 
numerous and crowded, the blades narrowly linear, 5—8 cm. long, entire, revolute, 1—nerved, 
glabrous above, densely white-woolly beneath; inflorescence freely branched, compact; heads 
about 21-flowered; involucre campanulate, 7-9 mm. high; scales loosely and irregularly 
imbricate, purple, densely gray-tomentose on the back, the outer ovate-lanceolate, acute, 
the inner narrowly oblong, obtuse to rounded or mucronulate; achenes glabrous, 4 mm. long, 
frequently resinous or dark-dotted in the furrows; pappus-bristles 7 mm. long, purple, 
the scales very narrow, white, 0.8 mm. long. 
TYPE LOCALITY: New Braunfels, Texas. 
DISTRIBUTION: Texas. 
96. Vernonia guadalupensis A. Heller, Muhlenbergia 
1 28. TOOT. 
Stems erect, simple to the inflorescence, thinly white pubescent to nearly glabrous; leaves 
numerous, crowded, the blades thin or firm, usually falcate, narrowly linear-lanceolate to 
linear, 8-15 cm. long, 5—10 mm. wide, acute or acuminate, entire or sparsely toothed, narrowed 
at base, glabrous above, thinly pubescent beneath; inflorescence irregular, rather compact; 
