242 GLEASON: TAXONOMIC STUDIES IN VERNONIA 
long, entire or with a few low teeth, obtuse or rounded at the base 
and apex, closely scabrous-pubescent above, finely gray-tomentose 
beneath; upper and rameal leaves similar but smaller and more 
densely tomentose, those in the cymes broadly ovate to subrotund, 
5-15 mm. long; cymes freely branching, forming a hemispheric 
cluster 2 dm. wide at the end of the branches; heads 21-flowered; 
involucre campanulate, 4-4.5 mm. high, its scales regularly im- 
bricate, all appressed or barely spreading at the tip, outer and 
middle scales ovate to ovate-oblong, sharply acute or cuspidate, 
tomentose-ciliate and often puberulent on the back, inner scales 
lanceolate, sharply acute or subacuminate, 4 mm. long, nearly or 
quite glabrous; achenes thinly pubescent and densely resinous- 
glandular; pappus white or very pale tawny, the bristles 6 mm. 
long, the paleae narrow, 0.6-0.8 mm. long. 
Type: Pringle 7697, collected by streams, Cuernavaca, More- 
los, Mexico, altitude 5,000 feet, March 16, 1899, and deposited in 
the herbarium of the New York Botanical Garden. 
While this species clearly resembles the other members of the 
species-group Deppeanae in leaf-habit, inflorescence, and pubes- 
cence, it is distinct in its glandular achene, a structure not ob- 
served elsewhere in the group. It resembles V. canescens H.B.K. 
in its white pappus, but differs in its pubescence and broader 
involucral scales. It approaches V. Deppeana Less. in its leaf- 
pubescence, but differs in its white pappus, sharper scales, larger 
involucre, and broader paleae. It is even more widely separated 
from the other species of the group. | 
Vernonia salamana sp. nov. 
A shrub, 2-2.5 m. high, branching above; stem striate, thinly 
cinereous-pubescent or becoming glabrate; leaves thin but firm, 
pale olivaceous, the blades ovate-elliptic, 3 X 7 cm., undulate, 
entire or remotely denticulate with low teeth, obtuse or subacute, 
obtuse or rounded at base, distinctly pubescent or subtomentos¢ 
above, finely pubescent beneath, especially on the prominent 
reticulated veins; petioles 4-8 mm. long, or the upper leaves nearly 
sessile; inflorescence of freely branched cymes, terminating the 
stem and the upper axillary branches and forming a-large pyt@ 
midal panicle 2.5 dm. in diameter; rameal leaves similar to the : 
cauline but smaller; cyme-branches leafless, straight, bearing 
three to six sessile, secund, 21-flowered heads; involucre broadly 
campanulate, 4-5 mm. high, its scales loosely but regularly 1m- 
bricate, pale green with a darker spot near the tip, ciliate, puberu- 
