Gleason: Studies on West Indian Vernonieae 329 



assigned the proper specific name without difficulty. In addition, 

 a new species has been collected by Shafer and is described below. 



With the exception of V. pallescens, whose position in this 

 group is somewhat uncertain, the group is distinguished by similari- 

 ties in habit. The leaves are of a comparatively broad type, 

 widest near or usually above the middle, and with the serration 

 most prominent on the distal half. The involucre scales are 

 regularly pubescent in two areas on the back, one on each side of 

 the mid-nerve. 



The four species may be distinguished as follows: 



A. Inflorescence strictly scorpioid; the cymes many-headed 



and elongated; heads all sessile. Vernonia pallescens. 



B. Inflorescence freely branched and subpaniculate, some of 



the heads pedicellate; leaves with a tendency to be 



broadest above the middle; scales glandular on the back, 



especially on each side of the mid-nerve. 



i. Heads with 18 flowers or more; involucres 5-8 mm. 



high, or some of the scales 10 mm. long, distinctly 



purple-tinged; leaves essentially glabrous on both 



sides; pappus white, or with a faint brownish yellow 



tinge. Vernonia havanensis. 



2. Heads 5-13-flowered; involucres 3-4 mm. high, ob- 

 scurely or not at all tinged with purple; leaves 

 scabrous above; pappus pale brown. 



a. Heads n-13-flowered; inner scales obtuse or 



subacute; inflorescence divaricate. Vernonia Ottonis. 



b. Heads 5-flowered, aggregated in subcapitate 



clusters at the ends of the branches, forming a 

 pyramidal or subhemispheric inflorescence; 

 inner scales acute. Vernonia Orientis. 



Vernonia pallescens Gleason. The species certainly differs 

 phylogenetically from the rest of the group, as shown by its 

 inflorescence and its geographical distribution. It is included in 

 the group merely for lack ofa better place to put it. 



Vernonia havanensis DC. Prodr. 5: 37. 1836. 



Vernonia stictophylla Wright, Sauv. Anal. Acad. Ci. Habana 6: 



176. 1869. 



The specimens at hand fall into two groups, the first with leaves 

 long-attenuate at base, almost sessile, and thin in texture; the 

 second with leaves cuneate into a distinct petiole and firm in 

 texture. No other characters for their separation have been 



