440 Lxxiii. coMPOsiTiE (OLIVER AND hiern). [GartJiamus. 



3. C. leucocaulos, Sihth. Fl. Grreca, t. 842. An erect glaucous 

 nearly glabrous prickly annual, 1-1^ ft. bigh, simple below. Stem 

 white, terete, smooth. Leaves deeply pinnatifid, the upper sessile, the 

 lower narrowed into a short petiole, 1-4 in. long ; lobes ovate, patent, 

 entire, ending in a sharp spine, the terminal one longer, lanceolate, 

 spinulose-denticulate ; the floral leaves 1^2 in. long. Capitala ^— |- 

 in. thick, terminating the apical divaricate branches. Inner involucral 

 bracts lanceolate, acute, minutely denticulate near the apex, not dilated 

 at base, about f in. long. Setae on the receptacle f in. long. Pappus 

 multiseriate ; outer rows shorter, obtuse, subpaleaceous, inner subseta- 

 ceoas, acate. — Ketdrophyllum leucocaulon, DC. Prodr. vi. p. 610, cum 

 syn. C. lanatus, Linn., var. gracilis ^ Schweinf. Fl. v. Sot. p. 17, 

 n. 173. C.persicus, W., Sp. PI. 1707, et herb, ex Boiss. Fl. Orient, 

 iii. p. 708. 



Wile Ziand. Soturba, Nubia, 22° N. Lat., 2,000 ft. alt., Schweinf urth ! 

 Common in Greece and occurs also in Crete, the islands of the Archipelago, and 



Egypt. 



101. PLEIOTAXIS, Steetz ; Benth. et Hook. f. Gen. PI. ii. p. 487. 



Capitula many-flowered, homogamous ; florets all tubular, herma- 

 phrodite. Involucre oblong-turbinate ; bracts oo-seriate, closely im- 

 bricate, inner oblong, outer ovate, successively shorter. Receptacle 

 "epaleaceous." Corolla-tube slender, suddenly dilated and deeply 

 5-fid above. Anther-cells with villous or ciliate tails. Achenes striate- 

 angular, with 6-7-seriate pappus ; setse rigid, very unequal. Style- 

 branches short, diverging, terminating in a short rounded glandular 

 appendix. — Herb with alternate petiolate denticulate leaves, hoary 

 beneath, and solitary terminal purple capitula. 

 A monotypic genus. 



1. P. pulcherrima, Steetz in Peters, Eeise Mossamh. Bot. p. 500, 

 t. 51. An erect simple herb, somewhat woody at the base, more than 

 a foot high; stems simple, terete, striate, silky-tomentose, whitish, 

 leafy to the top. Leaves elUptical, narrowed towards both ends, serru- 

 late or entire, silky-tomentose and hoary beneath, 4-5^ by l^-lj in. ; 

 petiole about -J in., sheathing. Capitula solitary, terminal, 1^ by | in. ; 

 peduncle short, clothed with long stiffish ascending hairs. Involucral 

 bracts glabrous, ovate, obtuse, the inner ones gradually longer, the 

 outer ones continued down the short peduncle. Corollas finely purple. 

 Achenes hairy, ^ in. long. 



IMEozamb. Distr. Sena, Peters! (in Herb. Berol.). 



102. ERYTHROCEPHALUM, Benth. ; Benth. jet Hook. f. 

 Gen. PI. ii. p. 488. 



Capitula homogamous ; outer florets 2-labiate, 1-seriate, inner tu- 

 bular, deeply 5-partite. Involucre campanulate ; bracts pauci- or 

 pluri-seriate, imbricate, outer lanceolate or ovate, inner passing into 

 the paleae of the receptacle. Ray-florets with an outer 3 -dentate ligule 



