162. 128. ASCLEPIADACEAE. 



6. CONOPHARYNGIA G. Don. "umKahlu" or "umHlambama. " 



ventricosa. Tree. Common in coastbelt hygrophilous bush. 



7. VOACANGA Thouars "umKahla'' or "umHlambamas.'' 



dregei E.M. Coastbelt hygrophilous bush. Common ; some- 

 times dominant. 



8. WRIGHTIA R.Br. (Shrub.) 



natalensis Stapf. Locally frequent in coast scrub. 



9. STROPHANTHUS DC. "Hlawi." "umZombocani." 



1. gerrardi Stapf. Frequent in coast scrub. Climber 



2. speciosus Reber. Midlands and Zululand. Climber. 



10. ONCINOTIS Bth. "Zongazonga." "uBuku." 



inandensis Wood & Evans. Herbaceous climber. Locally 

 abundant in coastbelt scrub. 



11. ADENIUM. Roem and Schult. (Succulent shrubs.) 



1. swazicum Stapf. Zululand. 



2. multiflorum Klotsch. Zululand. 



12. PACHYPODIUM Lindl. 



saundersii N.E.Br. Zululand. Lebombo mountains. In very 

 stony places. 



FAMILY 128— ASCLEPIADACEAE. 



Erect, prostrate, twining or scrambling herbs or shrubs 

 usually with milky juice. Leaves simple, exstipulate, usually op- 

 posite. Flowers regular, hermaphrodite, 5 merous. Sepals free 

 or nearly so. Petals united below. Stamens S usually adnate 

 to style. Filaments short or wanting. Pollen grains united in 

 masses or in granules of 3 — 5 grains. Corona formed of appen- 

 dages of stamens and petals. Ovaries 2 free, superior, rarely half 

 inferior. Ovules numerous, rarely few or 1. Styles 2, united above 

 into a thickened head, bearing on its under surface 5 stigmatic 

 dots, and on its sides between the anthers S small, usually horny, 

 pollen carriers. Fruit of 1 — 2 follicles. Seeds usually with a tuft 

 of hairs and little endosprm. 33 genera 179 species. 



1. Filaments of stamens free. Pollen in loose granules. 



(Periploceae). 2. 

 Filaments absent or united. Pollen in 1 — 2 waxy masses. S. 



2. Corolla with a distinct tube, campanulate or cylindrical. 3. 

 Corolla lobed nearly to base, rotate. 4. 



3. Corona lobes free, inserted with the stamens above the middle 



or at the throat of the corolla tube. 



2 RAPHIONACME. 

 Corona lobes inserted near the middle of the corolla tube, 

 distinctly above the bases of the stamens. 



1 CRYPTOLEPIS. 



