83 



2 Pollinia pendulous, 



2 Pollinia erect or horizontal. 



3 Stems usually leafy, rarely leafless. 



3 Stems leafless. 



KEY TO GENERA. 



A. PERIPLOCE^. 

 Stems twining. 



Stems erect. 



1 Coronal scales linear or clavate. Flowers small. 



1 (Coronal scales lonoj, subulate, Flowers small. 



Calyx 5-glandiilar within. 

 I Coronal scales long, setaceo-acuminate. Flowers 



small. Calyx not glandular 

 1 Coronal scales short, 3-lobed, central lobe 

 acuminate. Flowers large 

 2 Coronal scales clavate. 

 2 Coronal scales lanceolate or subulate. 



B. SECAMONE^. 

 Pollinia minute, coronal scales simple. 



C. CYNANCHE^. 

 Corolla imbricate in bud. 



Corolla valvate in bud. 

 I Stems erect. 

 1 Stems climbing. 



2 Coronal scales flat, without appendage. 

 2 Coronal scales flat or a little convex or concave, 

 with a simple or 2-fid process on face of each. 

 2 Coronal scales complicate, cucuUate, laterally 



compressed, margins introrse. 

 2 Coronal scales concave, cucullate at apex, 

 with a ligule on face of each. 



3 Corona erect, with small transverse lamina on 



face of each scale. 

 3 Corona spreading, with 2 collateral tongue-like 

 processes on face of each 



4 Coronal scales each with a beak-like process 



on face of each. 

 4 Corona annular or cup-shaped. 

 5 Corona single, lobes with or without lanceolate 



or ligulate scale on face. 

 5 Corona double, outer cup-shaped, inner 5- 



leaved. Leafless herbs. 



D. MARSDENIE^. 



C. CYNANCHEiE. 



D. Marsdenie^. 



E. Ceropegie^. 



F. Stapelibj:. 



Cryptolepis. 



Pentopetia. 



Tacgazzea. 



Chlorocodon. 



ectadiopsis. 



Raphionacme. 



Secamone, 



Coronal scales none. 

 Coronal scales 5. 

 Qoronal scales 10, 



Xysmalobium. 



sohizoglossum. 



gomphocarpus. 



asclfjpias. 



cordylooyne. 



Paninnia. 



Pen-mrrhinum. 



Cynanchum. 



SaRC08TEMMA. 



Gymnema. 

 Tenaris. 



