372 Lxxiii. COMPOSITJ; (oliver and hiern). [Sigesbeckia. 



opposite simple petiolate toothed or serrate leaves and loosely panicled 

 pedunculate capitula. 



A genus of 2 or 3 species, one of which is peculiar to this Flora. 

 Involucral bracts spreading, linear-spathulate with stipitate glands 1. S. oricntalis. 

 Involucral bracts oblong, scarcely exceeding the florets, eglandular 



or glands sessile 2. S. ahyssinica. 



1. S. orientalis, Linn. Sp. PL edit. i. p. 900. Pubescent an- 

 nual, 1-3 ft. high. Stem erect, sulcate- striate, terete, di- or tri- 

 chotomously branched. Leaves from deltoid-ovate to lanceolate, 1^-5 

 by 1-3 in., mostly acuminate, dentate, membranous, often cuneately 

 attenuate into a petiole of ^-H in. Capitula ^-^ in. diameter, hemi- 

 spherical, on peduncles ranging up to 1 in., in a usually dichotomous 

 leafy panicle. Bracts of the involucre 3-5, usually elongated and ^-| 

 in. long, covered with stipitate glands. 



Wile Iiand. Dalak Island, Red Sea, Billon (t. Klatt). 

 Widely spread over warmer regions especially in the Old World. 



2. S. abyssinica, 0. ^^ H. Scabrid herb, 2-3 ft. high. Stem 

 erect, sulcate-striate, terete, but little branched. Leaves ovate or the 

 upper lanceolate, acuminate, serrulate, membranous, somewhat ex- 

 cavated near the wedge-shaped base, 2—4 by ^-1^ in. ; petioles ^-1 in., 

 amplexicaul. Capitula ^-^ in. diameter, hemispherical, on peduncles 

 ranging up to § in., in a leafy narrow panicle. Bracts of the involucre 

 4-5, oblong, pubescent, ^ in. long, obscurely 5-nerved, exceeding the 

 paleae. Some minute sessile glands are scattered over the bracts of 

 the involucre. — >S'. orientalis (forma), Benth. et Hook. f. Gen. PI. ii. p. 

 359. Lininogenneton ahyssiniciim^ Schultz Bip. in Walp. Rep. vi. p. 

 147. Gryphiospermuru abyssinicum, Schultz Bip. in Hb. Schimp. 

 Abyss, ii. n. 1059, and in Walp. 1. c. 



Zrile ]Land. Ahysainia, Schimper .' Quart in Dillon. 



Differs from S. oricntcdis, L., by much shorter outer involucral bracts, without 

 stalked glands. 



56. ENHYDRA, Lour. ; Benth. et Hook. f. Gen. PI. ii. 360. 



Capitula axillary, heterogamous ; ray-florets multiseriate, incon- 

 spicuous, pistillate. Involucral bi-acts 4, broad, leafy, opposed in pairs. 

 Palea3 closely sheathing the florets of the prominent receptacle. Disk- 

 florets with regular o-toothed corolla. Anther-base obtuse, entire. 

 Achenes oblong, angled or subterete ; pappus 0. — Erect or creeping 

 herbs of wet places, with opposite sessile or shortly petiolate narrow 

 leaves, and axillary sessile or s^bsessile roundish whitish or greenish 

 capitula. 



A genus common to the Tropics of both hemispheres. 



1. £. flutituans, Lour. Fl. Gochinch. p. 511. A marsh or aquatic 

 perennial herb, 1-2 ft. high. Stem elongated, rooting, creeping or 

 ascending, simple or branched, glabrous or scabrid-pubescent above. 

 Leaves linear or linear-lanceolate, glabrous or slightly pubescent, en- 

 tire or toothed, very shortly petiolate, 1-3 in. long, base subhastate or 



