240 LXXXV. ASCLEPIADEiE (bROWN). 



Limb of the corolla nearly entire, with 5 subulate 

 points, the lobes being almost obsolete ; stems 

 with numerous angles formed of tubercles tipped 

 with stout spine-like bristles . . . .51. Hoodia. 



Limb of the corolla distinctly and often deeply 5- 

 lobed. 

 Stems thick, the numerous angles formed of con- 

 fluent tubercles tipped with a simple bristle, 

 or rarely very blunt and pointless; corolla 



small, rotate or sub-campanulate . . .50. Teichocaflox. 



Stems 6-12-angled ; tubercles of the angles tipped 

 with three biistles, the two side ones dc- 

 flexed ; corolla large, tubular-funnel-shaped . 53. Tovaresia. 

 Stems 4-6-angled. 



Corolla with the base of the sinuses between the 



lobes produced into small triangular teeth . 54. HrERNiA. 

 Corolla without teeth in the sinuses between the 

 lobes. 

 Outer corona cup-shaped or annular and 

 entire or variously toothed, or of 5 small 

 pouches alternating witli the anthers, 

 or of 5 more or less deeply bifid lobes 

 which have their margins more or less 

 adnate to the basal part of the inner 

 coronal -lobes or are nearly free. 

 Corolla 3-5 in. in diam., with a very small 

 tube ; tips of inner coronal-lobes 

 dilated, inflexed . . . .52. Edithcolea. 



Corolla usually under 1 in. rarely 1^-3 

 in. in diam. ; tips of inner coronal- 

 lobes not dilated . . . .49. Caralluma. 

 Outer corona of 5 spreading lobes free to their 

 base, entire, emarginate, or 2-4-toothed 

 at the apex ; corolla star-like, usually 

 but not always without a distinct tube . 56. Stapelia. 

 Outer corona in one piece, disk-like, pen- 

 tagonal, resting on the raised rim of the 

 disk of the corolla and closing the 

 spurious tube formed by it ; inner 

 coronal-lobes rhomboidal-ovoid ; corol'.a- 

 lobes more or less folded lengthwise, and 

 often into narrow vertical plates . . 57. DuvALiA. 



Outer corona absent ; inner coronal-lobes very 

 stout, 4-angled in cross-section in the 

 lower part, adnate to the ataminal- 

 column for half their length . . 55. Hueeniopsis* 



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