212 schomburgk's guiana plants. 



XVIII. — Contributions towards a Flora of South America. — Enu- 

 meration of Plants collected hy Mr Schomburgk in British 

 Guiana. — By George Bentham, Esq., F.L.S., &c. &c. 

 {Continued from Vol. II. p. 324.) 



llUBIACE^. 



Tribe, Gardenie^. 



440. Amaioua saccifera, Mart. — DC. Prod. iv. 370 — 

 Swamp on the Rio Padawire, Schomburgk. — The flowers in 

 the single specimen before me are all male by abortion, the 

 ovarium being rudimentary only, 



441. Genipa Americana, Linn. — DC. Prod. iv. 378. — Bri- 

 tish Guiana, Schomburgk. n.208 Presl's G. barhata appears 



to me to be the same plant. 



442. G. Carnto, Humh. et Kunth DC. Prod. iv. 378.— 



Rio Branco, Schomburgk. n. 796. 



Gardner's n. 1042 from Pernambuco is a Genipa, appa- 

 rently new. 



443. Sphinctanthus rupestris, gen. nov. — Rocks on the 

 Rio Negro, Schomburgk. n. 900. 



Char. gen. Calycis tubus turbinatus, limhus brevis, laxus, 

 breviter 5-dentatus. Corolla tubus calyce longlor, snperne sub 

 fauce contractus, intus annulo pilorum barbatus; limbus 5- 

 lobus, laciniis patentibus, aestivatione contorta. Stamina su- 

 periore tubo inserta, antheris oblongis subexsertis. Ovarium 

 carnosum, biloculare, ovulis numerosis in placentis puiposis 

 nidulantibus. Stybis filiformis, medio fusiformis, apice in 

 lobos duos stigmatiferos incrassatus. 



S. rupestris. Frutex 6-pedalis, raniulis glabris, sub axiUis 

 saepe compressis. Folia 2-3-pollicaria, ovato'lanceolata v. ob- 

 longa, utrinque angustata, obtuse acuminata, membranacea, 

 glabra. Stipulae utrinque solitariae, adpressse, breves, lata?, 

 acuminatEe. Flores ad apices ramulorum 1-2, sessiles. Calyx 

 3 lin. longus, limbo 3 lin. diametro, dentibus parvis acutis. 

 Corollse tubus 6 lin. longus, elongato-conicus, crassus, striatus, 

 tomento brevissimo pubescens, laciniis obtusiusculis fere 5 lin* 

 longis. Stigmata exserta. — Flores, teste Schomburgkio, luteae. 



This genus, of which I have not seen the fruit, is evidently 



