SCHOMBURGK's GUIANA PLANTS. 223 



culi et calyces resinosi — Gathered by 31. Schomhurgk in 

 his excursion to Roraima and Esmeralda, but without the 

 precise locality being indicated. 



472. Commianthus Schomburgkii. (gen. nov.) Savannahs 

 of British Guiana, Schomhurgk. n, 179. 



Char. Gen. Calycis limbus tubulosus truncatus, denti- 

 bus 5 brevibus setaceis persistens. Corolla tubus brevis, 

 limbus 5~partitus, patens, laciniis £estivatione contorto-imbri- 

 catis. Stamina fauci inserta, exserta. Filamenta crassius- 

 cula. AnthercB lineares. Ovarium carnosum, disco corona- 

 turn, 5-Ioculare, ovulis in quoque loculo2collateralibus. Stylus 

 filiformis, superne incrassatus, apice brevissime 5-lobus, lobis 

 stigmatiferis. Bacca globosa, calyce coronata, 5-locularis, lo- 

 culis abortu monospermis. 



C Schomburgkii. Frutex 10-15-pedalis. Ramuli pube 

 brevi exasperati, Stipuloe utrinque solitariae, late triangu- 

 lares, breves. Spicse terminales simplices viscoso-pubes- 

 centes uti flores gummani resinosam exsudantes. Flores 

 fere oppositi sessiles, delapsi cicatricem oblongam in rhachide 

 relinquunt. Calyx 2^ lin. longus. Corolke tubus calycem 

 vix excedens, glaber ; limbus utrinque pilis adpressis pubes- 

 cens, laciniis oblongo-linearibus 3^ lin. longis. 



Tribe, Gdettarde^. 



473. Guettardamacraw^^a, (sp.n.); foliislate ovatis breviter 

 acuminatis basi obtusis, supra sparse pubescentibus, subtus 

 sericeo-villosis, stipulis ovatis acutis undulatis, pedunculis 

 folio brevioribus, floribus dense cymosis, bracteis lineari-lan- 

 ceolatis calyce truncate integro parum brevioribus, coroUae 

 sericeae tubo longissimo, limbi laciniis 5-6-planis v. vix undu- 

 latis. — Folia ampla fere G. crispifiorcs. Inflorescentia G. 

 scabrcE. Corollas demum plus quam 2^ poll, longce, albse, 



odore Rosse Dry savannahs, British Guiana, Schomburgk. 



n. 778. 



Gardner's n. 1152 from Pernambuco, and 1696 from 

 Ceara belong to Guettaj'da. 



