526 ASCLEPIADE^. (MILKWEED FAMILY.) 



pubescent without; apex of leaves of crown truncate, with one tooth at 

 each inner angle ; follicles oblong, tapering, mealy-tomentellous be- 

 tween red bristles — Spring — Wadis south of Dead Sea, and south- 

 ward to Sinai. 



6. CALOTROPIS, R. Br. CALOTHons. ' Ushr. ' UsMr. 



Calyx parted to base. Corolla hemispherical-campanulate, with a 

 short, angled tube, bulging inward at angles, and a deeply cut limb. 

 Staminal crown consisting of 5, keeled leaflets, vertically adherent to 

 gynostegium, gibbous below. Pollen-masses coulter-shaped, fastened 

 by tapering tip. Stigma 5-angled, apiculate. Follicles inflated, obovate. 



C procera, Willd. 5 Apples of Sodom? ^JJsJir. ^Ushdr. 

 MantaneTi. 3 to 5 ; bark corky, white ; juice milky. Leaves obovate, 

 .1 to .15 long, sessile, fleshy, mealy-velvety especially at lower surface, 

 beset with awl-shaped glands at insertion. Corolla .02 broad, pink, 

 lobes ovate, spreading, with somewhat re volute margin; follicles .04 

 to .08 long {called Beid-el-'' UsMr) — Spring — El-Ghor, and around 

 Dead Sea, and southward to Sinai and Egypt. 



7. TI3i"CETOXICUM, Mcench. Vincetoxicum. 



Calyx 5-parted. Corolla rotate, deeply 5-lobed. Crown shield- 

 shaped, fleshy, simple, not spurred within, 5-10-lobed. Pollen-masses 

 bulging, pendulous. Stigma apiculate. Follicles oblong-terete, hor- 

 izontal, unarmed — Perennial, erect herbs, sometimes somewhat 

 twining. 



V. canescen§, Willd. 11 .3 to .4, tomentellous ; stems erect. 

 Leaves o^ate, acute, short-petioled, .04 to .06 long. Umbels axillary 

 and terminal, 00 - flowered ; flowers short-pedicelled ; corolla yellow, 

 .003 to .005 broad, hirsute within ; lobes of crown 5, obtuse; follicles 

 canescent then giabrescent, .03 .04 long, .008 to .01 in diameter near 

 base — Summer — Middle to subalpine Lebanon, Antioch, Kurd Dagh, 

 Aintab, Marash, and northward. 



§. CYNAB^XHUM, L. Cynanchum. 



Calyx 5-parted. Corolla rotate, deeply 5-parted. Crown tubular- 

 campanulate, enclosing gynostegium, 10-lobed, the outer 5 lobes long- 

 er, the inner 5 opposite the outer. Pollen-masses ovate, divergent. 

 Stigma o-angled, 2-tubercled. Follicles unarmed, usually (by abortion) ■ 

 solitary — Twining, herbaceous perennials. 



C acutuni, L. Glabrous below, puberulent above. Leaves 

 cordate-auricled at base, acuminate. Umbels axillary, peduncled; 

 calyx more or less pubescent, one-third as broad as .006 to .008 broad, 

 white or pink corolla; follicles cylindical-tapering, .09 to .12 long, 

 .008 in diameter — June to September — Coast; el-'Arabah; el-Ghor; 

 Antioch, and northward and eastward. 



9. PEXTATROPIS, R. Br. Pentatropis. 



Calyx 5-parted. Corolla rotate, deeply 5-parted, with slender, 

 long-tapering lobes, at length neflexed. Crown double, the outer re- 

 duced to 5-teeth opposite the inner, or 0, the inner 5 leaflets adnate to 

 gynostegium, free above, spurred below. Anthers ending in a mem- 

 branous tip. Pollen-masses ovoid — Perennial, twining, climbing 

 herbs, with greenish flowers. 



