FLORA OF ADEN. 
222 
Tribe III— Mutisiese : Heads homogamous ; flowers all tubular and hermaphrodite, or 
the outer bilabiate; or heterogamons, with the ray-flowers female or 
neuter, sometimes bilabiate. Involucral bracts usually oo -seriate, un- 
armed or spinescent. Receptacle rarely paleaceous. Corollas 2-lipped 
or with a deeply 5-fid limb. Anthers usually tailed. Style-arms rounded 
or truncate, inappendiculate. Pappus setose or paleaceous, rarely o„ 
Leaves radical or alternate, rarely opposite. . 6. Dicoma. 
Tribe IF.— Cichorie® : Heads homogamous. Corollas all ligulate ; ligules truncate, 
5-toothed. Anther-bases sagittate, rarely tailed. Style-arms slender* 
Pappus setose, paleaceous or o. Leaves radicle or alternate, never opposite. 
Herbs. 
Achenes compressed, beaked ... 7. Lactuca. 
Achenes columnar, truncate at both ends . 8. Launsea. 
1. Yernonia Sckreb. 
Herbs, shrubs or trees. Leaves simple, alternate, entire or toothed. 
Capitula terminal or axillary, homogamous, cymose or panicled* 
Involucre ovoid, globose or hemispheric, equalling or shorter than the 
flowers ; bracts in many series, the inner longest. Receptacle naked 
or pitted, sometimes shortly hairy. Corollas all equal, regular, tubular, 
slender ; lobes 5, narrow. Anther-bases obtuse. Style-arms subulate, 
hairy. Pappus usually biseriate of many hairs. 
Achenes striate, ribbed or angled, rarely terete. 
Species about 280. 
Distribution : — Chiefly tropical, mostly in America. 
1, Vernonia atriplicifolia (Forsk,) Jaub. etSpach. 111. PI. Or. IV, 94, 
tab. 359 ; Anders, Journ. Linn. Soc. Y, Suppl. pp. 21 ; Boiss. FI. Or. 
Ill, 154 ; Oliv. FI. trop. Afr. Ill, 270. 
Yernonia spathulata Schultz Bip. ex Aschers. in Schweinf. Beitr. FI. 
Aethiop. pp. 162.. 
Vernonia arabica Dene, ex Boiss. FI. Or. Ill, 154. 
Chrysocoma spathulata Forsk. Fl. Aeg.-Arab. pp. 147. 
Description : — A small shrub, ranging up to 3 feet high, with 
numerous, dichotomous, spreading branches, covered with close, whitish 
sericeous, stiff hairs and scattered with sessile glands. Leaves alternate, 
ovate, varying from oval to rhomboidal, pointed or rounded at the apex, 
rounded or narrowed at the base, with 1 — 3 coarse teeth on each side, 
fleshy, small, subsessile or shortly stalked, ranging up to J — 1 inch by 
% — 4 inch. 
Capitula subturbinate, about 12 -flowered, in terminal dichotomous 
or numerous small congested cymes, forming a diffuse leafy panicle* 
