328 LXXIII, COMPOSITH (OLIVER AND HIERN). [ Pluchea. 
in corymbose or few-headed terminal cymes. Corolla “ white, yellow 
or lilac.” 
A genus of the warmer regions of both hemispheres, numbering from 20 to 30 
species. 
Leaves all undivided, quite entire or denticulate. 
Petioles 4-} in. long. . . 2. 1. 1. we ee OL P. odorata. 
Petioles shorter or obsolete. . 
Leaves decurrent in toothed wings . . . . . « 2 P. ovalis. 
Leaves not decurrent. . 
Leaves small, }-Sin.long. . . . . . . . + 3. P. sordida. 
Leaves larger, 1-8 in. long. 
Outer involucral bracts ovate, acute or apiculate. 
Leaves membranous or subcoriaceous . . 4. P. Dioscoridis. 
Outer involucral bracts broadly ovate, obtuse, 
not apiculate. Leaves coriaceous * * ‘ 5. P. lanceolata. 
Some of the leaves quite entire, other deeply incise-den- 
tate. . . 6 
see ee ee . 6. P. heterophylla. 
Leaves deeply pinnatifid . ... . 
7. P. pinnatifda. 
1. PB. odorata, Cass. Dict. xlii. p. 3. Herbaceous ? Branches 
subterete, striate, tomentellous. Leaves oval-oblong, obtuse or sub- 
acute, narrowed at the base into the petiole, minutely denticulate, 
puberulous on both sides, 2-5 in. long by 3-14 in. wide, flat. Petioles 
4-4 in. long. Capitula campanulate-hemispherical, many-flowered, 
¢ in. long, on short pedicels, in dense branched corymbose cymes 4 in. 
diam. Scales of the involucre pluriseriate ; inner linear, acute, glabrous ; 
outer oval or oblong, obtuse, pubescent, shortly ciliate, successively 
shorter. Receptacle flat, ;1, in. diam., naked. ' Achenes small, scat- 
tered with minute sete.—DC. Prodr. v. p. 452, cum syn. 
Upper Guinea. Senegambia, Perrottet ! Lelierre ! 
Widely spread in Tropical America, P. senegalensis, Klatt. in Ann. Se. Nat. Ser. 
V., Xvill. 368, appears to be this species. 
> 2. B®. ovalis, DO. Prodr. v. p. 450. Shrubby, tawny-pubescent or 
tomentose. Branches terete, striate, leafy. Leaves elliptic or ovate, 
obtuse or subacute, denticulate-serrate, narrowed towards the sessile 
auriculate-clasping base, decurrent in unequally dentate wings 
1-2 in. long by 4-1 in. wide. Capitula on short unequal pedicels, 
+-3 in. diam.,in dense corymbose terminal panicles. Scales of invo- 
lucre lanceolate, or inner linear, subrigid, pluriseriate, imbricated, acute 
or subacute, puberulous, shortly ciliate ; outer successively shorter. 
Receptacle flat, naked. Achenes glabrons or with a few short hairs on 
the angles. Pappus sordid, uniseriate, scabrous.—Baccharis ovata, 
Sieber! Pl. Seneg. Exsicc. n. 61; B. ovalis, Pers. Synops. ii. P- 424, 
ex DC. lc. 
Upper Guinea. Senegambia, Brunner! Sieber t 
Occurs also in Atlantic Islands and N.W. India. 
3. BP. sordida, 0. § H. Shrubby, 2-3 ft. high or more. Leaves 
narrowly obovate, obtuse, narrowed to the sessile base, entire "i 
nearly so, tomentose or both sides, 4-3 in. long. Heads campanulatt, 
din. long, on short pedicels, in numerous small globose cymes. Fem 
florets numerous; male about 5. Scales of the involucre pluriseriate, 
