ASCLEPIADE&® (Brown). 523 
XXI. Pentarrbinum.—Corona of 5 free obconic or trumpet- or slipper-shaped 
lobes, with infolded margins and truncate or rounded at the apex, with a horn 
directed over or towards the anthers. Style not exceeding the anther- 
appendages. 
XXIL. Cynanchum.—Corona annular, cup-shaped or tubular and truncate or 
toothed at the top, or divided nearly or quite to the base into 5 dorsally 
flattened entire or toothed lobes, with or without keels or other processes within 
the tube or on the inner face or at the base of the lobes. Style shorter than or 
exceeding the anther-appendages. 
XXVII. Tylophora.—Corona-lobes usually of 5 tubercles adnate to or radiating 
from the staminal column at or above its base and usually not exceeding the 
filament part of it, rarely with free tips or of free dorsally flattened Icbes and 
attaining to the level of the anther-tips. Pollen-masses pendulous or sub- 
horizontal. Style rarely slightly exceeding the anther-appendages. 
§§ Corona in 2 distinct series. 
XXIII. Sarcostemma.— Corolla rotate or rotate-campanulate. Outer corona 
annular or cup-shaped, pentagonal, truncate or shortly lobed. Inner corona 
of 5 simple laterally compressed or keeled lobes, embraced at the base by the 
outer corona. Stem leafless, fleshy. 
XXIV. Pergularia,—Corolla with a campanulate or cylindric tube and widely 
spreading lubes. Outer corona annular, shortly 5-lobed. Inner corona of 
5 erect fleshy lobes, produced into a subulate incurved horn at the apex and — 
with a spreading or deflexed spur at the base. Stem not fleshy. Leaves 
large, cordate. 
Tribe IV. Magspentem.—Anthers erect or incurved-ascending, with (or 
without in Spherocodon) a membranous appendage at the apex. Pollen-masses 
distinctly erect in the anther-cells, opaque and usually not very minute, or in 
Emplectanthus minute with a pellucid margin on one side. 
N.B.—Tylophora is intermediate between Marsdeniee and Cynanchee and is 
placed in the latter tribe,as in most of the South African species the pollen- 
masses are distinctly pendulous, in others, however, they are very minute, 
subglobose, attached at their middle to very slender caudicles and neither erect 
nor pendulous. 
+ Corona double, arising from the staminal column. 
XXVIII. Emplectanthus. - Outer corona-lobes with pocket-like bases and 
minute spreading emarginate or bifid tips. Inner corona-lobes adpressed to 
the backs of the anthers and not exceeding them, dorsally connected to the 
basal margins of the outer corona-lobes. Follicles long and slender, linear- 
terete, probably constricted between the seeds, Stem twining. 
tt Corona of 5 distinct lobes or tubercles in one series arising from the 
staminal column, 
XXIX. Spherocodon.—Corona of 5 small fleshy tubercles on the staminal 
coluinn much above its base. Stamens erect or tortuous, not twining. : 
XXX. Marsdenia,—Corona of 5 erect lobes adnate to the staminal column with 
free margins and tips. ollicles stout, coriaceous, with 4 broad wings. Stem 
very long, twining. 
XXXI. Prageluria.— Corona of 5 erect lobes, adnate to the staminal column 
below, free above, with a subulate process on the inner face. Stem twining. 
tit Corona tubular, arising in the angle between the staminal column and 
the corolla, lobed or toothed at the top, with 1-2 superposed series of 
teeth” or filiform processes and 5 pairs of wing-like keels within the 
tube. 
XXXII. Fockea.—Rootstock a large tuber. Stem erect or twining. Anther- 
appendages very large, membranous, inflated. 
