244 LXXX. ASCLEPIADE^. 



H. Gordoni, Sw., our only species, is an erect, fleshy and thorny, many- 

 angled succulent, bearing solitary, shield-shaped, dehcate flowers, 2-1. inches 

 n diameter. — Ifative of Namaqualand. 



Order LXXXI. APOCYNE^. 



Calyx 5- (or 4-) parted, imbricate. Corolla liypogynous, ga- 

 mopetalous, regular, 5- (or 4-)lobed, deciduous, twisted-imbri- 

 cate in bud. Stamens on the corolla, as many as its lobes, 

 and alternate with them ; filaments distinct ; anthers 2-celled ; 

 pollen powdery. Carpels 2, either distinct or united into a 

 bilocular ovary ; styles confluent upwards ; stigma 1. Fruit 

 follicular, capsular, berried or drupaceous. Seeds many or 

 few ; albuminous. — Shrubs or rarely herbs, mostly with a 

 milky, poisonous juice. Leaves mostly opposite, quite entire, 

 without stipules. Chiefly tropical and subtropical. 



Ovary single, 2-celled. 



Ovules solitary in each cell 2. ToxiCOPHL(EA. 



Ovules more than 1 in each cell. 



No cup-like disk round the ovary .... 1. Carissa. 

 A cup-like disk girding the ovary .... 3. Rauwolfia. 

 Ovary double, of 2 separate carpels ; style 

 simple. 

 Calyx tubular-bellshaped, shortly 5-lobed, de- 

 ciduous 4. PiPTOLAyA. 



Calyx 5-parted. 



Trees shrubs or undershrubs, not spiny or 

 fleshy. 

 Corolla salver- shaped, with short, obtuse 

 lobes. 

 Linear glands vrithin the calyx, at base 



of lobes ; anthers taper-pointed . . 5. Tabeen^montana. 

 Iso glands within the calyx ; anthers 



obtuse . 6. GrONIORNA. 



Corolla funnel-shaped ; lobes very long, 

 linear-subulate ; 5 2-partite scales in 



the throat 7. Strophanthus. 



Succulent shrubs, armed with twin-spines 

 in the place of stipules. 



Calyx glandular within at base ; anthers 

 on short filaments; seeds comose at each 

 end 8. Adenium. 



Calyx-lobes not glandular within ; an- 

 thers sessile ; seeds comose at the scar 

 only 9. Pachtpodium;. 



1. CARISSA, Linn. 



Calyx 5-parted; lobes unequal, with a row of subulate, 

 fleshy glands at base wdthin. Corolla salver-shaped, the tube 

 hairy within. Anthers longer than the filaments, lanceolate, 



