466 LXXIV. ASCLEPIADACE.E 



Corona-scales long, filiform Streptocaulon (p. 467). 



Corona-soales short, broad Brachylepis (p. 468). 



Leaves alternate. A small tree .... TTtleria (p. 468). 

 B. Corolla-lobes valvate. 



Corolla-lobes glabrous, purple within . . . Hemidesmus (p. 468). 



Corolla-lobes densely white-bearded . . . Decalepis (p. 



II. Filaments connate into a staminal-tube, pollen-masses waxy, solitary in each cell 

 (in pairs on the pollen-carriers) or, in a few genera (Secamone, Toxocarpus, Geni- 

 anthus), in pairs in each cell (in fours on the pollen-carriers). 



A. Corolla-lobes contorted, overlapping usually to the right. 



(a) Corolla rotate, large, 1 in. across and more. 



Base of 1. deeply cordate Holostemma (p. 468). 



Base of 1. rounded or cuneate .... Treutlera (p. 468). 



(b) Corolla rotate, middle-sized. 



Trailing leafless shrubs Sarcostemma (p. 468). 



Climbers, 1. ovate, often with a cordate base. 



Fl. bright green, in umbelliform cymes . Dregea (p. 468). 



Fl. greenish-yellow and red, in corymbose 



racemes Cormostigma (p. 468). 



Climbers, 1. lanceolate . . . . . Secamone (p. 468). 



(c) Corolla campanulate, funnel- or salver-shaped. 



Pollen-masses 2 in each cell (20 in all), 



corolla-lobes overlapping to the left . 3. Toxocarpus. 

 Pollen-masses 1 in each cell (10 in all). 

 Pollen-masses pendulous. 

 Fl. greenish-yellow, follicles densely 



clothed with long soft spines . . T>muia (p. 469). 

 Fl. pure white, follicles smooth . . Baphistemma (p. 469). 

 Pollen masses erect. 

 No staminal corona. 



Corona corolline, of double raised 



villous ridges on the inside of the 



corolla-tube , . . . .4. Gymnema. 



No corolline corona, follicles solitary, 



globose or ellipsoid, seeds without 



coma. Littoral climbers . . Sarcolobus (p. 470). 



Corona scales adnate to staminal column. 



Corolla-tube J in. long .... Pergularia (p. 470). 

 Corolla-tube under J in. 



Corona-scales large . . . .5. Marsdenia. 



Corona scales small or . . . Gongronema (p. 471). 



B. Corolla-lobes valvate in bud. 



Fl. large, corolla J in. across or more. 



Erect shrubs, wood soft, or branches almost 



herbaceous 6. Calotropis. 



A climbing shrub, bark corky .... Dittoceras (p. 472). 



Fl. middle-sized or small. 



Scales in the corolla-mouth between the lobes, and an undulate ring at the 

 base of staminal-tube. Anthers without a membranous tip. 

 Calyx half the length of corolla, or shorter . 7. Leptadenia. 

 Calyx longer than half the corolla . . Orthanthera (p. 472). 



No scales in the corolla-mouth. Anthers with a membranous inflexed tip. 

 Staminal-corona of 5 horizontally spreading 



lobes ........ 8. Heterostemma. 



Staminal-corona of 5 erect lobes . . . Genianthus (p. 473). 



Cryptostegia grandiflora, Br. ; Wight Ic. 832 and 111. t.' 182, f . 9. — Syn. Nerium grandi- 

 florum, Boxb. Commonly cultivated in gardens, probably a native of Madagascar. 

 A large climbing shrub, 1. glossy, fl. pale purple, funnel-shaped, limb 1J-2 in. across. 

 Corona-scales corolline, cleft to the base into 2 long filiform segments. Follicles thick, 

 straight, divaricate, 4-5 in. long. Said to yield a good kind of Caoutchouc. 



1. CRYPTOLEPIS, E. Br. ; PI. Brit. Ind. iv. 5. 



Twining glabrous shrubs. PI. in lax slender dicbotomous terminal or 

 axillary cymes, corolla-tube sbort, lobes long linear, twisted. Corona-scales 5, 

 in or above the middle of the tube, linear or spathulate. Pilaments slightly 



