SCHOMBURGK's GUIANA PLANTS. 235 



511. S. laxiforum (sp. n.); foliis oblongo-ellipticis, acii- 

 minatis, basi rotundato-cuneatis vix coriaceis, stipulis ionge 

 aristatis, paniculis terminalibus trichotoniis laxis. — Folia et 

 stipxilae fere S. ferret, a qua difFert inflorescentia seepius ter- 

 minali laxiore, ramis bis terve trifidis. Corollae tubus 7 lin. 

 longus. An forte idem ac S. multifloriim, A. Rich. ? — British 

 Guiana, Schomburgk. 



Siderodendron has the ovarium of Psychotria and Coffea, tlie 

 stipules of Coffea and Faramea, but may be readily distin- 

 guished from ihem all when in flower by the long slender tube 

 of the corolla. The erect ovules separate it at once from 

 Chomelia^ Scolosanthus, &c. 



512. Chomelia tenuifora (sp. n.); foliis ovatis acuminatis 

 ad venas ramulisque pilosulis, spinis axillaribus validis, flori- 

 bus in ramulis brevibus axillaribus foliatis 1-3 sessilibuSj 

 calycis limbi semi-4-fidi,laciniis subulatis, corolla extus pilosa, 

 laciniis linearibus acutis. — Folia I^-2-pollicaria, supra de- 

 mum glabrata, nitida, axillis venarum subtus barbatis. Stipu- 

 IcB basi latas, subulato-acuminata?. Calycis limbus tubulosus, 

 laciniis tamen tubo longioribus. Corolla tenuis, pollice 

 parum longior, laciniis 4 lin. longis. Stamina fauci inserta, 

 filamentis brevibus. Ovarium biloculare, ovulis in quoque 

 loculo solitariis pendulis. — Banks of streams, British Guiana, 



Schomburgk, n. 314 This plant has the habit of Chomelia as 



well as the more important characters, but the long slender 

 divisions of the corolla distinguish it from the other species. 



513. C. angustifolia (sp. n.) ; glaberrima, foliis oblongis, 

 obtusis utrinque angustatis, pedunculis filiformibus folio vix 

 brevioribus trifloris, calycis limbi laciniis oblongis, obtusis, 

 inaequalibus. — Frutex 12-i5-pedalis. Spinas in specimini- 

 bus suppetentibus nullse. Stipulse subulato-acuminatae. 

 Ramuli floriferi, breves, foliis approximatis l-li-poUicari- 

 bus. Flores glabri, aibi v. flavicantes, odorati ; tubus corol- 

 lae 4 lin. longus, limbi laciniae 1^-lin., oblongae, obtusse. — 

 Falls of the Essequibo, Schomburgk, n. 32. 



Gardner's n. 1038, from Pernambuco, is very near to C. 

 obtusa, Chixm., but the divisions of the calyx are rather unequal 



