ON 80UTH-AMEEICAN APOCTNACE^. 97 



obtusely keummated, cctfiaceous, with 7-10 pairs of arcuately conjoined nerves, with 

 others shorter and intermediate, smooth above, 3-4 in. long, l|-2 in. broad, on petioles 

 2-3 lines long; panicles terminal or axillary, 8-4 in. long, on an elongated angular 

 tomentous peduncle, with many lateral branchlets bare at their base and bearing several 

 small pubescent flowers in heads 4J-6 lines in diameter, on short pedicels, with ovate 

 bracts 1 J line long ; flowers l|-2 lines long. 



9. Thyrsanthtjs Guyanensis, nob. : Forsteronia Guyanensis, Miill. Linn, xxx, 414. In Gniana Brit. 

 (Schomb. 821-1466) : v. s. in herb. Mus. Brit. (Sagot 1067). 



A Species differing from all the preceding in its slighter habit. It has slender branch- 

 lets, verrucously lenticellate, with axils about 1 in. apart ; leaves elliptic, acute at the 

 base, suddenly constricted at the summit into a shortish obtuse acumen, subcoriaceou^, 

 margins revolute, pale green above, with divaricate slender nerves, the midrib near the 

 petiole charged with a yellow granular gland as in the typical species, pale reddish 

 yellow beneath, opake, slender nerves prominulent, mostly with a pore in their axils as 

 in T. Schomburgkii, 2-2^ in. long, |— 1 in. broad, on channelled petioles 1^ line long ; 

 panicle pyramidal, 2 in. long, its branches on a quadrangular rachis bearing several (4-6) 

 subumbellate, very small flowers, on pedicels 1 line long, all ferruginously puberulous ; 

 sepals acute, with ciliate margins, 1 line long ; corolla 2 lines long ; tube ^ line long, 

 puberulous ; segments lanceolate, hirsutulous outside, with dextrorse sestivation, glabrous 

 inside, with median nerve obsoletely puberulous. 



10. Thyesanthtts coeymbosus, noh. :■ Forsteronia corymbosa, A. DC. (non Mey.) Z. c. p. 437: Griseb. 



Fl. Br. W. Ind. p. 413 : Echites corymbosa, Jacq. Amer. p. 34, tab. 30; Sw. Obs. 105. In Antillis : 



V. s. in hb. Mus. Brit. Jamaica (Dr. Wright) . 

 A twining species, growing to the height of 20 feet ; very lactescent, with divided 

 glabrous branches, the axils being 1 in. apart; leaves elliptic, somewhat rounded and 

 obsoletely cordate at the base, subacute at the summit, entire, glabrous, green above, 

 with prominulent red, arching nerves, and transverse, much reticulated veins, with 2-8 

 distant small glands at the base of the midrib, pallid beneath, 2-2^ in. long, |-li in. 

 broad, on slender petioles 3-4 lines long ; panicle terminal, divided into two principal 

 branches If in. long, which are much divided into many approximated branchlets 9 lines 

 long, each on a bare pedunculate support 2J lines long, and bearing above 8 crowded 

 bracteolated divisions, forming a corymbulose head, each division again divided into 

 about 7 pedicellated flowers; bracts linear-lanceolate, membranaceous, red, obsoletely 

 pubescent, 1^ line long ; pedicels pubescent, J line long ; sepals linear-acuminate, very 

 membranaceous, red, pubescent at the base, obsoletely pilosulous outside above, 1 line 

 long; corolla If line long; tube | line long; segments obtusely oblong, membrana- 

 ceous, red, subreflexed, IJ line long, with dextrorse convolution ; stamens inserted in a 

 pilose ring within the tube, exserted ; anthers scarcely cohering, connivent, with a 

 broad membrane at the apex, and 2 parallel short obtuse lobes at the base ; disk of 3 free 

 oblong erect lobes, as long as the 2 ovaries, pubescent at the q,pex ; 2 elongated obtusely 

 terete follicles, horizontally divaricate, 8 in. long; seeds numerous, oblong, subseri- 



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