Gleason : Studies on West Indian Vernonieae 307 



As long ago as 1829 Lessing mentioned a specimen of this 

 species from the "insulis Caribaeis" in Willdenow's herbarium. 

 The herbarium of the New York Botanical Garden now contains 

 a specimen from Guadeloupe, Duss 4032, where it occurs in a single 

 locality. It is therefore admitted as a member of the North 

 American Flora. 



Species-group Arborescentes 



Vernonia icosantha DC. Occurs also in Guadeloupe Island, 

 Duss 2812. 



Vernonia arborescens (L.) Sw. This species, typically of 

 Jamaica, occurs also in Grand Cayman, Hitchcock, in the herbarium 

 of the Missouri Botanical Garden. 



Vernonia amaranthina sp. nov. 



Apparently herbaceous and freely branched, height not re- 

 ported; stem and branches straight, striate, closely and softly 

 pubescent or tomentulose, the branches ascending; leaves spread- 

 ing, firm, rather dull green, ovate-lanceolate to narrowly oblong- 

 elliptical, the principal ones 7-9 cm. long by 2-3 cm. wide, acute 

 or short-acuminate, entire or somewhat irregular at the margin, 

 but not serrate, narrowed to an acute base, minutely papillose- 

 pubescent and scabrellate to the touch above, pubescent, espe- 

 cially along the veins, and minutely glandular beneath, veins 

 conspicuous, elevated beneath, the lateral ones strongly ascending; 

 petioles definite, 5-10 mm. long, pubescent or tomentulose; 

 inflorescence freely branched and spreading; cymes short, naked 

 below and bearing 2-5 heads aggregated near the tip, or separated 

 by internodes less than I cm. long; rameal leaves resembling the 

 cauline but smaller, those subtending the cymes narrowly ob- 

 lanceolate, 1-2 cm. long, those subtending the heads linear to 

 narrowly oblanceolate, shorter than or barely equaling the in- 

 volucre; heads 21-29-flowered, sessile; corolla purple; involucre 

 campanulate, about 5 mm. high, its scales purplish, thinly 

 pubescent, irregularly imbricated, the outer triangular to ovate, 

 sharply acute and somewhat cuspidate, the inner oblong, rounded 

 to a mucronulate tip; achenes densely hirsute, 1.5 mm. long; 

 pappus white, 4 mm. long, the outer series conspicuous. 



Type, E. G. Britton 28gy, from "Greenland," Jamaica, March 

 13, 1908, in the Herbarium of the New York Botanical Garden. 

 Britton & Hollick 2133, from Green Island, Jamaica, is also 



