June, 1923] 
GLEASON — BOLIVIAN SPECIES OF VERNONIA 
305 
Middle and outer scales subacute to obtuse or 
rounded. 
Middle and outer scales lanceolate, acuminate and prolonged, 
with the prominently carinate midvein, into a subulate 
tip. 
Leaves silvery-whitened beneath with dense but short 
sericeous pubescence, narrowly oblong-lanceolate, acumi¬ 
nate, narrowed to the base. 
Leaves not densely and closely silvery beneath. 
Pappus deep brown. 
Leaves softly and closely sericeous beneath with 
long hairs; lateral veins prominent, con¬ 
spicuously equidistant and parallel. 
Heads 11-flowered; outermost involucral scales 
mostly appressed, lanceolate, sharply tipped; 
stem and branches velutinous; leaf pubescence 
brownish, densely sericeous or subtomentose. 
Heads 18 - 21-flowered; outermost involucral 
scales loosely erect, acicular; stem and 
branches densely sericeous with erect hairs; 
leaf pubescence gray, comparatively loose. 
Leaves pubescent beneath with comparatively sparse 
irregular hairs; lateral veins not conspicuously 
equidistant and parallel. 
Involucre densely villous or subtomentose; stem 
closely and densely velutinous with brown 
hairs. 
Involucre thinly villous to nearly glabrous; stem 
villous. 
Pappus white or pale straw-colored. 
Leaves of a lanceolate type, broadest below the 
middle, pale green or yellowish-green, densely 
or softly sericeous beneath; lateral veins 
prominently parallel. 
Leaves rugose above and minutely scabrellate, 
the largest up to 15 cm. long; lateral veins 
scarcely elevated above the lower surface; 
stem velutinous with greenish-brown hairs; 
involucre brown, the inner scales mostly very 
thin and frequently somewhat spreading. 
Leaves flat above and scabrously puberulent, the 
largest exceeding 20 cm. in length; lateral 
veins 20-25 pairs, stout, heavy, conspicuously 
elevated above the lower surface; involucre 
purplish, the inner scales sharply acuminate 
and strictly erect. 
Leaves of an elliptic type, broadest near the middle, 
dark green, resinous beneath, pubescent or barely 
sericeous on the lower surface and prominently so 
on the veins; lateral veins not conspicuously 
parallel. 
39. V. baccharoides. 
40. V. Bakerana. 
41. V. densipaniculata. 
42. V. mapirensis. 
43. V. sordidopapposa. 
44. V. tristis. 
45. V. pseudomollis. 
46. V. cos tat a. 
47. V. cordiaefolia. 
