314 GLEASON: STUDIES ON WEsT INDIAN VERNONIEAE 
2-10, 1906, in the Herbarium of the New York Botanical Garden. 
Two other sheets in the same herbarium are Britton 151, from New 
Haven Gap, and Shreve, from Sir John Peak. 
The seven species of the group may be distinguished by the 
following key: 
A. Heads more or less secund, 11—18-flowered; involucre cam- 
panulate to hemispheric, distinctly spreading when 
press-dried; its scales loosely and irregularly imbri- 
cated in fe 
I. Principal leaves about 3 times as long as broad. 
a. Heads 11—13-flowered; pappus brown. Vernonia divaricata. 
b. Heads 18-flowered; pappus white. Vernonia albicoma. 
2. Principal leaves twice as long as broad, or less 
a. seesnisigs broadly ovate-lanceolate, distinctly acu- 
nate; exposed portion of inner involucral 
ic oblong; heads 18-flowered; cymes freely 
branched. Vernonia acuminata. 
b, Leaves broadly ovate, acute or subacuminate; ex- 
posed portion of inner involucral scales ovate; 
heads r1-flowered; cymes sparingly branched. Vernonia expansa. 
B. Heads not at all secund, 5-8-flow wered; involucre narrowly 
Dp 
dried; its begs rather uniformly imbricated in 
several ran 
1. Leaves sprea rs or ascending, nearly or quite sessile, 
distinctly oblong-obovate or subrhomboidal, 30-50 
m. long, acute; heads 8- (rarely 5-) flowered. Vernonia pluvialis, 
2. Leaves proportionately narrower or larger, “nauiess 
near the middle, more or less acuminate 
a. Leaves elliptical-oblong, about 25 X65 mm., con- 
spicuously reflexed; heads 8-flowered. Vernonia proclivis. 
b. Leaves narrowly elliptical-oblong, about 14 X45 
mm., spreading; heads 5-flowered. Vernonia reducta. 
SPECIES-GROUP FRUTICOSAE 
When a sheet of Santo Domingan material came to hand, 
identified by Dr. Urban as authentic V. fruticosa Sw., it was at 
once seen that the species was entirely distinct from V. rigida 
and from the whole group to which V. rigida belongs. It was also 
seen that its nearest congeners were to be found among some un- 
described species from eastern Cuba, with which it is accordingly 
grouped. As in several other species-groups, the chief similarity 
between the species included is in the general habit. The most 
