238 LXXXV. ASCLEPIADE.E (bROWN). 



on the stamiiial- column or occasionally an incon- 

 spicuous ring at its base . . , . . 37. (Ivhnema. 

 **Corolla double, in two tli>tinct sories. 



Outer corona of 5 distinct lobes or of a membranous 

 ring, inserted at the sinuses of the corolla, inner 

 corona of 5 distinct lobes on the staminal- 

 column opposite the anthers . . . 38. Anisoptjs. 



Outer corona of 5 fleshy lobes united in a ring at 

 their base, inserted at the base of the corolla 

 opposite the corolla-lobes and close to the 

 fleshy annular inner corona on the staminal- 



column 34. Oxcostemma. 



***Corona simple ; lobes in one series, but sometimes 



with appendages on their inner face, opposite the 



antliers, free or connate into a tuDe, arising from 



the staminal-column or in the angle formed by 



the union of the staminal-column with the corolla. 



Corolla tubular, toothed, with 5-10 teeth within in 



front of or alternating with the principal teeth; 



anthers with large inflated appendages . . 41. Fockea, 



Corona annular, thick, crenate, surrounding the 



short staminal-column under tlie anthers . 35. Nanostelma. 



Corona of 5 distinct lobes or tubercles. 



Coronal-lobes tubercle-lil^e and entirely ndnate to 

 the staminal-column or radiating from its 

 base, or, in Sphcerocodon melananthus ^ of 5 

 incurved-erect teeth on tlie middle of the 

 filamental part of tlie stammal-column. 

 Flowers in simple umbels or umbel-like cymes; 



stems erect 36. Sph.t:rocodon. 



Flowers in umbel-like clusters scattered along 

 the axis of a simple or branched inflo- 

 rescence, rarelv sessile at the nodes ; 

 stems twining except in T. orthocaulis. 

 (See also Tylophoropds, which differs in 

 having the pollen-masses pendulous from 

 horizontal caudicles) . . . .33. TiLOrHOEA. 



Coronal-lobes with their basal part adnate to the 

 staminal-column shortly free above and ad- 

 pressed to the backs of the anthers, rarely 

 entirely free, not tubercle-bke, or if tubercu- 

 lar at the base, then with a free erect point. 

 Corolla-tube more or less inflated at the base ; 

 coronal-lobes with a process on the inner 

 face of their free apical part . . .40 Pergvlaeia. 



Corolla rotate or with a campanulate, globose- 

 campanulate or urceolate tube ; coronal- 

 lobes without a process on the inner face 

 of their free apical part . . . .39. Maesdenia. 



Teibe V. Ceropegrieae. — Stamens with their filaments connate into a t^de 

 and adnate at the top to the dilated part of the style. Anthers erect or incumbent 

 on the top of the style, with or without an apiculus or a short terminal appendage. 

 Pollen-contents of each anther-cell united into one waxy mass. Folloi-masses 

 pellucid along the inner margin or at the apex, attached in pairs to the pollen- 



