88 ASCLEPIADACE^. Philiherda. 



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

 flowers : corolla white or whitish, scarcely lialf inch in diameter, smoothish ; the lohes 

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

 costemma cynanchoides, Decaisne in DC. Prodr. viii. 541. S. hilobum, Torr. 1. c, not Hook. & 

 Arn. 1 Gonolobus 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 botli 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. — Sarcostemriia 

 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 heterophyllum, var. hirteUum, Gray, Bot. Calif, i. 478. — Fort Mohave, California, on 

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



B>^ 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. — Sarcoslemma heterophjtlum, Engelm. in Torr. Pacif. R. 

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

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

 P. viminalis, Gray, 1. u. 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 or 

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

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

 Meyer, PI. Esseq. 139 ; Griseb. PL W. Ind. 419. S. clausum, Decaisne, 1. u. S. crassi/olium, 

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



3. PODOSTfGMA, Ell. (novc,; no86g, foot, and axlyfia, i. e. stalked 

 stigma.) — Sk. i. 826. Stylandra, Nutt. Gen. i. 170. — Single species. 



P. pubescens, Ell. 1. i;. 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. 65; Chapm. PI. 

 366. Asdepias pedicellata, Walt. Car. 106. Stylandra pumila, Nutt. 1. c. — Low pine barrens, 

 N. Carolina to Florida : fl. summer. 



4. ANANTHEBIX, Nutt. (Composed of a, privative, and dvdt'Qii, awn, 

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

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

 first species. 



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

 cent above : leaves opposite, sessile, oblong (1| to 2^ inches long), or the uppermost 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). Anantherix viridis, 

 Nutt. Gen. 1. c. (1818), but not Asdepias viridis, Walt. Acerates connivens, Decaisne in DC. 

 Prodr. viii. 621. — Wet pine barrens of Georgia and Florida : fl. summer. 



5. ASCLEPIODORA, Gray. (Jtsxl/jmag and drngov or dcoQsa, the gift 

 of Asdepias.) — 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- 



