( 180 ) 
15. VERNONIA ARBORESCENS (L.) Sw. FI. Ind. Occ. 3: 1320. 
1806 
Conyza arborescens L. Syst. Nat. ed. 10. 2: 1213. I 
Leaves thin, ovate or ovate-lanceolate, subacute to acuminate, 
sparsely pubescent above, densely so beneath and with elevated 
reticulated veins; outer scales acuminate, the i inner acute or abruptly 
acuminate; pappus white. 
Type locality and distribution: Jamaica. 
16. Vernonia crassinervia Wright zzed. sp. nov. 
Shrubby ; stems striate, ead ae or pubescent, with short inter- 
nodes, simple or with a few nches; leaves firm, elliptic-oblong, 
1.5-2 cm. long, 0.5-I cm. ie entire, tapering regularly from 
the middle to both ends, rugose and scabrellate above, pubescent 
and with a few prominent veins beneath; cymes 1-3, 1 dm. long 
or shorter, bearing 2-6 sessile heads, of about 13 flowers; bracteal 
leaves narrowly oblong, equaling or exceeding the involucre; scales 
all erect, loosely and irregularly imbricated in few series, lanceolate, 
sparsely pubescent, scarious on the sees sharply acuminate; 
achenes densely hirsute, 2 mm. long; pappus white or brownish, 
6 mm. eae the outer series of conspicuous oblong scales. 
Type: Wright 2787, from Cuba; in the Gray Herbarium; 
Combs 745 is identical with it. The species is distinct from all 
other West Indian species in its short elliptic leaves. 
17. VERNONIA MEMBRANACEA Griseb. Cat. Pl. Cuba 144. 1866 
Suffrutescent; stem finely pubescent, branching above; leaves 
thin, spreading, broadly elliptic or ovate-oblong, 5-8 cm. long, 
2.5-4 cm. wide, obtuse, entire, se at the base, sparsely ‘pubes- 
cent on both sides; deta oles 3-5 m eee heads in short spreading 
— subtended by bracteal jogs 1-3 cm. long; involucre cam- 
panulate, 6 mm. cs scales lanceolate, ae thinly pubes- 
cent; pappus s brow 
Type locality a si@abuton: Cuba. 
In shape of leaf and general habit the species greatly resembles 
V. albicaulis Pers. 
(iv) Species-group Araripenses 
Heads in leafy cymes, the involucral scales acuminate or subu- 
late; achenes hirsute; leaves linear to lanceolate or narrowly ob- 
long, several times longer than wide, pubescent beneath. Species 
of the West Indies and northern South America. 
