PMUbertia. ASCLEPIADACEiE. 87 



or bearded within. Crown of 5 flat or slender and distinct scales or processes, borne 

 either on the corolla or the column. Stigma with flat top or with a mere apiculation at 

 the centre. 



13. MELINIA. Calyx-lobes narrow and acute. Corolla with thin-edged lobes slightly 

 overlapping in the bud. Crown of. 5 distinct fleshy scales at the base of the column. 

 Stigma abruptly long-rostrate, the beak entire. 



14. VINCETOXICUM. Corolla rotate or somewhat campanulate, 5 parted; the lobes 

 dextrorsely overlapping or nearly valvate in tlie bud. CJrown on the sliort column or at 

 its junction with tiie corolla, cup-shaped or annular and usually 5-10-lobed or parted, or 

 of 5 distinct plane scales, not appendaged. Stigma with flat or obtusely conical top. 



Tribe II. GOXOLOBE^E. Anthers usually with short if any scarious tip, and 

 borne on the margin of or close under tlie disk of the stigma ; the cells opening 

 more or less transversely. Pollinia horizontal or nearly so, otherwise as in the pre- 

 ceding tribe, but usually smaller. 



15. GONOLOBUS. Corolla rotate or rarely campanulate, 5-parted or 5-lobed ; the lobes 

 dextrorsely convolute in the bud : crown annular or cupulate, entire or lobed, rarely di- 

 vided. Stigma flat-topped. 



1. ASTEPHANUS, R. Br. {.^ort'cpavog, crownless.) — Slender and small- 

 flowered herbaceous or suffrutesceut plants, chiefly of the southern hemisphere. 

 — Benth. & Hook. Gen. ii. 747. 



A. Utahensis, Engelm. Perennial from a thick root, low, nearly glabrous : stems 

 filiform, twining : leaves filiform-linear, acute : short peduncles umbellately ;5-5-flowered : 

 corolla dull yellow, little longer than the calyx, campanulate (a line high and wide) ; the 

 lobes ovate, somewhat cucuUate with points inflexed, papillose-puberulent internally : fol- 

 licles long-acuminate : surface of the seed rough-granulate. — Am. Naturalist, ix. 3i9. — 

 Dry sandhills, St. George, S. Utah, Parry. Hardyville, Arizona, Palmer. 



2. PHILIBERTIA, HBK., Benth. & Hook. (J. G. Pliilibert, author of 

 some French elementary botanical works.) — Perennial herbaceous or shrubby 

 twining plants (of warmer N. and S. America) ; with petiolate leaves, and usually 

 dnll-colored or parti-colored fragrant flowers : peduncles umbellately several- 

 many-flowered : fl. summer. — Benth. & Hook. Gen. ii. 750. Sarcostemma, as 

 to spec. Amer., HBK., Decaisne in DC, &c. Corolla in oitr species deeply 5- 

 cleft or parted (= Sarcostemma., HBK.), the lobes commonly ciliate. 



* Column manifest, ratlier longer than the tumid scales of the inner crown on its summit. 

 P. undulata, Gray. Low-twining, glabrous or cinereous-puberulent, pale : leaves 

 thickish, from lanceolate and gradually acuminate to linear from a hastately cordate base 

 (2 or 3 inches long), the margins undulate-crisped : peduncle 6-10-flowered, longer than the 

 petiole and pedicels : corolla dull purple, glabrous above, half inch in diameter ; the lobes 

 ovate ; outer crown saucei*- shaped : follicles 4 or 5 inches long. — Proc. Am. Acad. xii. 95. 

 Sarcostemma undalata, Torr. Bot. Mex. Bound. 161. — W. Texas and New Mexico, Parry, 

 Bif/elow, Writjht, &c. 



* * Column none or very sliort and inconspicuous : peduncles about equalling or surpassing the 

 plane leaves : foUicles tomentulose or glabrate. 



P. Torreyi, Gray. Freely twining, densely pubescent with soft spreading hairs : leaves 

 cordate-lanceolate and acuminate or sagittate, an inch or more long : peduncle 10-15- 

 flowercd : corolla apparently white, two-thirds to three-fourths inch in diameter ; the lobes 

 little shorter than the pedicel, broadly ovate, obtuse, externally puberulent, strongly vil- 

 lose-ciliate, outer and inner crowns contiguous. — Proc. Am. Acad. xii. 94. Sarcostemma 

 elcqans, Torr. 1. c, not Decaisne. — Rocky hills, S. W. Texas, on the Rio Grande and its 

 tributary the Cibolo, Parry, B'kjcIow. — P. elerjans is less pubescent, with smoother corolla 

 purple in part within, the lobes narrower, and a short column develojied between the thick 

 and prominent outer crown and the inner. 



P. cynanchoides. Gray, 1. c. Tall-climbing (8 to 40 feet), glabrous or glabrate: leaves 

 from deeply cordate to sagittate or almost hastate, abruptly cuspidate or short-acuminate, 



