GLEASON: STUDIES ON WEsT INDIAN VERNONIEAE 321 
I, Species of Santo Domingo; leaves oblong, very tomen- 
subcordate base; inner involucral scales rounded and 
apiculate at the tip. - Vernonia Sprengeliana, 
II. Species of Cub 
A. Leaves ca coriaceous, more or less revolute and 
hining above, oblong or Bids tes ces 
a aaie dentate or entir 
Heads wered; sateen cylindric. Vernonia purpurata. 
. Heads ak 18 flowers or more; involucre cam- 
panulate 
a. Leaves narrowly oblong, at least three 
times as fie as broad, ipa or with 
numerous minute spinulose teeth. Vernonia Valenzuelana. 
b. Leaves Coca oblong, a twice as 
long as Ass entire, or with a few 
LS 
barely spreading, the inner acute, : 
e outer mucronate. Vernonia leptoclada, 
** Outer scales conspicuously squarrose 
or reflexed, all sharply acuminate or 
subulate Vernonia Wrightit. 
B. Leaves thin or firm, bat coriaceous, flat, 
serrate,  ptisadedicatas, or entire 
I. Leaves puberulent or glabrous beneath. 
a. Outer scales of the involucre short, acute 
or mucronulate, appressed. Vernonia Sagraeana, 
b. Outer scales o e involucre elongated, 
subulate, pape Vernonia aronifolia. 
ae Leaves, Laie beneath. 
involu et chia sharply acumi- 
e, densely e. Vernonia viminalis. 
b. ae opoee As gem rounded to a 
mucronate apex, or acute. 
* er scales obtuse or subacute; 
muddle scales without scarious 
margin; leaves entire or obscurely 
spinulosedentiulate Vernonia fallax. 
** Inner scales shsaiates the middle 
with a scarious margin. 
° Leaves narrowly linear-oblong, 
entire. Vernonia aceratotdes. 
°° Leaves narrowly elliptic-oblong, 
sharply serrate. Vernonia inaequiserrata. 
Vernonia Sprengeliana Sch.-Bip. The type specimen cited by 
Schultz is Bertero 507 and the recent description by Gleason is 
: 
