438 MEXICO.— SUPPLEMENT. [Gentians. 



1. Cerbera Thevetia. Jacq. Am. 48. t. 34. Bot. Mag. t. 2309. 

 Hab. Acapulco. 



Oed. XXX. ASCLEPIADEiE. Br. 



1. Asclepias Curassavica. L. — var. foliis angustioribus. 

 Hab. Realejo. 



2. A. incarnata. L Bot Reg. t. 250. 



Hab. Realejo. — The structure of the flowers in the solitary specimen agrees with A. incarnata, especially 

 in the narrow exserted horns of the nectary, but the staminal crown is, in the dried specimen, deep yellow, 

 and the leaves are larger (5 inches long by 2 broad) and upon longer petioles than in authentic specimens of 

 A. incarnata. 



3. A. longicornu (Benth. PI. Hartweg. p. 24); suffruticosa, ramis adscendentibus 

 pubescentibus, foliis petiolatis ovatis v. ovali-oblongis obtusis undulatis basi cuneatis 



crassiusculis utrinque pubescentibus, umbellis breviter pedunculatis interpetiolaribus 



Flores majusculi. Corolla reflexa, laciniis acutiusculis. Coronas foliola cornuformia, 

 angusta, gynostemio plus duplo longiora, supra medium divergentia, apice latiora, aperta, 

 processu acuto foliolum parum superante. Benth. 



Hab. Realejo.— A very fine and distinct species. The root is woody and tuberous. Drummond's As- 

 clepias from Texas (2d Coll. n. 219), is, if not the same, a nearly allied species. 



1. Sarcostemma bilobum (n. sp.) ; glabrum, caule herbaceo scandente, foliis longe 

 petiolatis cordato-ovatis tenuissime acuminatis basi profunde bilobis sinu angusto lobis 

 rotundatis, umbellae multiflorae pedunculo foliis longiore, pedicellis elongatis. 



Hab. Acapulco — An undoubted Sarcostemma, with leaves 1J to 2 inches long, having so deep a fissure 

 or narrow sinus at the base as to extend one-third the length of the leaf. Segments of the corolla at length 

 reflexed. Outer corona, a fleshy, elevated, entire ring ; inner of 5 fleshy, ovato-triangular, very conspicuous 

 leaflets. 



• Ord. XXXI. GENTIANE^. Juss. 



1. Erythraea macrantha (n. sp.); caule diffuso acute tetragono ramoso angulis suba- 

 latis, ramis alternis, foliis linearibus acutis trinerviis floribus terminalibus solitariis, calyce 

 pentagono ultra f fisso, laciniis subulatis tubum corollae aequantibus, corollse tenui-mem- 

 branaceae subpellucida? laciniis ovato-lanceolatis patentibus, capitulo tubum duplo tri- 

 plove superante, antheris spiraliter tortis, stigmate ? — /3. major; foliis anguste linearibus 

 uninerviis. — Erythraea Mexicana (?) Hook, et Am. supra, p. 302. {the var. from Tepic.) 



