xcv. ASCLEPIADE^E. (J. D. Hooker.) 3 



**** Corona single, staminal, cupular or annular. Corolla rotate. 



Corona of a 10-lobed ring, and 5 horny processes behind the 



anthers 25. HOLOSTEMMA. 



Corona annular. Leafy erect or twining herbs or shrubs . 26. CYNANCHOM. 

 Corona annular. Leafless straggling shrubs ...... 27. SARCOSTEV 



TRIBE IV. XVEarsdenieae. Anthers with a membranous inflexed tip 

 (absent in Physostelma and rarely in Hoyci] ; pollen-masees solitary in each cell 

 (10 in all), sessile, or pedicelled in pairs on the corpuscle, erect (rarely horizon- 

 tal or pendulous in Tylophora). 



* Corolla-lobes overlapping. Corona 0, or corolline. 



Stem twining. Corolla-lobes-short. Corona 28 SARCOLOBTJS. 



Stem pendulous. Corolla-lobes long. Stigma included . . 29. PENTASACME. 

 Stem twining. Corolla lobes short. Corona on the corolla- 

 tube 30. GYMNEMA. 



** Corolla-lobes overlapping, Coronal processes- on the staminal column, 

 rarely 0. 



f Corolla urceolate companulate or salver-shaped. 



Corolla urceolate. Coronal processes minute or 0. Stigma 



included 31. GONGRONEMA. 



Corolla urceolate or salver-shaped. Coronal scales on tip- 

 back of the anthers, simple ^fARSDENIA. 



Corolla rotate or sal ver-sb aped. Coronal scales on the baiA 



of the anthers, notched y '. PERGULARIA. 



Corolla salver-shaped, coriaceous. Coronal scales (in . , 



Indian species) U STEPHANOTIS. 



Corolla-lobes long, doubled down inwards in bud .... . r YGISMA. 



ft Corolla rotate. 



Cymes various. Column minute. Coronal processes fleshy . 3<L Tvi/n 



Cymes umbelliform. Column large ; coronal processes simple ,"7 > 



Cymes racemiform. Column minute, fleshy ; coronal pro- 

 cesses 2-fid 38. COSM- 



Cymes umbelliform, pendulous. Coronal scales spreading, 



cuspidate ?/. DiuwaA, 



*** Corolla valvate. Coronal processes adnate to the staminal column. 



Corolla small, rotate. Column short, corona stellate. Fol- 

 licles slender 40. ITKTKROSTF.MMA. 



Corolla large, rotate. Column short, corona stellate. Fol- 

 licles stout 41. DITTOCERAS. 



Corolla urceolate or disciform. Corona cupular, fleshy . . 42. OIANTHUS. 



Corolla minute, urceolate. Coronal scales membranous, erect 43. DISCHIDIA. 



Corolla rotate. Corona very large, stellate 44. HOYA. 



Corolla cupular. Corona large, stellate ...... 4 > PHYS^M 



Corolla-tube short, lobes long subulate. Ovary sunk in the 



calyx-tube 46. PYCXORHACHIS. 



TRIBE V. Ceropegiese. Anthers incumbent on the stigma, without a 

 membranous tip ; pollen-masses one in each cell (10 in all) sessile in pairs on 

 the corpuscle, erect or horizontal. Corolla-lobes valvate in all. 



B2 



