Philibertia. ASCLEPIADACEiE. g7 



e[th''eronfhe''Si. nT" ''\ ^ ^^' ^'- ^^^""^^ ^^^^ -instinct scales or processes, borne 

 the centre "^ "™- ^^'^""^ "^'^^ ^^' '^P °^ ^'^^ ^ mere apicula [ion at 



13. MELINIA. Calyx-lobes narrow and acute. Corolla with thin-edeed lobes slishtlv 

 overlapping in the bud. Crown of 5 distinct fleshy scales at the Se of the cXmZ 

 Stigma abruptly long-rostrate, the beak entire. i-wiuiua. 



^\7.}f.?'^^^^]^^^- ^°™'}^ '"^^" ^'^ ««"^ewhat carapanulate, 5-parted; the lobes 

 ?ts?unP ?n^ overlappnig or nearly yalvate in the bud. Crown on the short column or at 

 Its junction wth the 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. GONOLOBE.E, Anthers usually with short if any scarious tip, and 

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

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

 cedmg tribe, but usually smaller. 



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

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

 vided. Stigma flat-topped. r , > j 



1 . AST:6PHANUS, R. Br. (^azECpavog, crownless.) — Slender and small- 

 flowered herbaceous or suffrutescent 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 3-5-flowered : 

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

 Ipbes ovate, somewhat cucullate with points inflexed, papillose-puberulent internally : fol- 

 hcles long-acuminate : surface of the seed rough-granulate. — Am. Naturalist, ix. 349.— 

 Dry sandhills, St. George, S. Utah, Parry. Hardy viile, Arizona, Palmer. 



2. PHILIB:6RTIA, HBK., Benth. & Hook. (J. C. PIdUbert, author of 

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

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

 dull-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 our species deeply 5- 

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



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

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

 thickisli, 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 saucer-shaped : follicles 4 or 5 inches long. — Proc. Am. Acad. xii. 95. 

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

 Bigelow, Wright, &c. 



* * Coliunn none or very short and inconspicuous : peduncles about equalling or surpassing the 

 plane leaves : follicles tomentulose or glabrate. no is 



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- 

 flowered : 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 

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

 tributary the Cibolo, Parry, Bigelow. — P. elegans is less pubescent, with smoother corolla 

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

 and prominent outer crown and the inner. 



P. cynancholdes, 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, 



