88 ASCLEPIADACE^. Philibertia. 



1 to 2-J- inches long : peduncle 15-25-flowered : pedicels filiform and much longer than the 

 flowers : corolla white or whitish, scarcely half inch in diameter, smoothish ; the lobes 

 oblong-ovate, acutish, somewhat ciliate : crowns separated by a very short column. Sar- 

 costemma cynanchoides, Decaisne in DC. Prodr. viii. 540. S. bilobum, Torr. 1. c., not Hook. & 

 Arn. 1 Gonolobits viridiflorus, Torr. in Ann. Lye. N. Y. ii. 219, not Nutt., and probably not 

 from " St. Louis." Along rivers, Texas to S. Utah and Arizona. (Adjacent Mex.) 

 P. linearis, Gray, 1- c. Slender, low twining or when young erect, puberulent or gla- 

 brate : leaves narrowly linear, acute or nearly so at both ends, short-petioled (an inch long) : 

 peduncle exceeding the leaves, 8-10-flowered : corolla yellowish, purplish, or whitish, barely 

 puberulent, a third inch in diameter; the lobes ovate: crowns contiguous. Sarcostemma 

 lineare, Decaisne, 1. c., & in PI. Hartw. 25. S. Arizona. (Mex.) 



Var. hirtella. Cinereous-pubescent throughout with short spreading hairs, little 

 climbing : leaves as in the original species in form and size : sepals more slender. Sar- 

 costemma heterophyttum, var. hirtellum, Gray, Bot. Calif . i. 478. Fort Mohave, California, on 

 sandy river-banks, Cooper, &c. Hardyville, Arizona, Palmer. 



Var. heterophylla. More twining, glabrous, merely puberulent or above pubescent : 

 leaves 1 or 2 inches long, 1 or 2 lines wide, some tapering into the petiole, some with 

 rounded and more with somewhat dilated or auriculate-cordate or truncate base : corolla 

 smoother, half inch in diameter. Sarcostemma heterophyttum, Engelm. in Torr. Pacif. R. 

 Rep. v. 363, & Bot, Mex. Bound. I.e. (with var.?); Gray, Bot. Calif. 1. c. California, 

 from San Luis Rev, San Diego, &c. to Arizona. 



P. viminalis, Gray, 1- c. Glabrous or nearly so, freely twining : leaves thickish, from 

 ovate-oblong to lanceolate, cuspidate-acuminate, obtuse or rounded at base, short-petioled 

 (an inch or two long), shorter than the many-flowered peduncle: corolla half an inch 01- 

 more in diameter, white; the lobes ovate, puberulent outside. Asdepias viminalis, Swartz, 

 Prodr. 53; Willd. Spec. i. 1270 (Sloane, Jam. t. 131, f. 1). Sarcostemma Brownii, G. F. 

 Meyer, Fl. Esseq. 139 ; Griseb. Fl. W. Ind. 419. S. clausnm, Decaisne, 1. c. S. crassifolium, 

 Chapm. Fl. 368. Keys of Florida. (W. Ind. to Guiana.) 



3. PODOSTlG-MA, Ell. (/ToiV, nodo^ foot, and (m'jy*, i. e. stalked 

 stigma.) Sk. i. 326. Stylandra, Nutt. Gen. i. 170. Single species. 



P. pubescens, Ell. 1- c. Perennial herb, a span to a foot high from a thickened root: 

 stem erect, simple or sparingly branched : leaves opposite, linear-lanceolate, nearly sessile; 

 peduncles terminal and axillary, short, umbellately several-flowered : flowers greenish. 

 yellow, fragrant, 4 lines long: follicles tomentulose. Deless. Ic. v. t. 05 ; Chapm. Fl. 

 366. Asdepias pedicdlata, Walt. Car. 10(3. Stylandra pumila, Nutt. 1. c. Low pine barrens, 

 N. Carolina to Florida : fl. summer. 



4. ANANTHERIX, Nutt. (Composed of , privative, and <frQt'tji$, awn, 

 i.e. destitute of the horn of Asdepias.) Single species, being Anaittherix, 

 Nutt. Gen. i. 169, not of Trans. Am. Phil. Soc. ser. 2, v. 201, except as to the 

 first species. 



A. connivens, Gray. Stem erect, 2 feet high from a perennial root, minutely pubes- 

 cent above: leaves opposite, sessile, oblong (14- to 24- inches long), or the iippermost small 

 and lanceolate, transversely veined, rather fleshy : umbels 2 to 6 along the naked summit 

 of the stem, several-flowered : lobes of the greenish corolla ovate, 5 lines long : hoods 

 whitish, incurved-conniving over the stigma ; a pair of small and narrow internal appen- 

 dages before the base of each : hyaline anther-tips elongated: follicles not seen. Proc. 

 Am. Acad. xii. 66. Asdepias connivens, Baldw. in Ell. Sk. i. 320 (1817). Anaiitherix viridis, 

 Nutt. Gen. 1. c. (1818), but not Asdepias I'iridis, Walt. Acerntes connivens, Decaisne in DC. 

 Prodr. viii. 521. Wet pine barrens of Georgia and Florida: fl. summer. 



5. ASCLEPIODORA, Gray. (s'JGxfojTtiog and dcoQnr or danfu, the gift 

 of Asclepios.) Perennial herbs (of Atlantic N. America), rather low and stout, 

 often decumbent ; distinguished from Asdepias by the anther-wings and hood, the 

 latter with a crest answering to the horn of that genus, from the original Anan- 



