376 LXXXV. ASCLEPIADEE (BROWN). [ Margaretta. 
Imperfectly known species. 
5. M. Cornetii, Dewevre in Comptes-rendus Soc. Bot. Belg. xxxiv. 
90. Resembles MW. rosea, Oliv., and W/. Holstii, K. Schum., in general 
appearance but has a larger inflorescence and larger flowers. Sepals 
34 lin. long, lanceolate, acute, pubescent. Corolla-lobes oblong, obtuse, 
mucronate, glabrous, greenish-yellow. Coronal-lobes 74 lin. long, 
obovate, obtuse, narrowed into a claw at the base, mauve with a yellowish 
midrib. 
South Central. Congo Free State: Katanga, Cornet. 
I have not seen this species, but from the imperfect description judge it to be 
closely allied to M. orbicularis, its flowers seem to be larger than those of the 
species known to me. 
22. PACHYCARPUS, E. Meyer, Comm. 209. 
Calyx 5-partite. Corolla deeply 5-lobed, campanulate, rotate or 
reflexed; lobes overlapping to the left in bud. Corona of 5 lobes 
arising from the base of the staminal-column, usually long, tongue- 
shaped, linear or dilated at the apex and frequently at the base also, 
spreading at the base then more or less incurved over the staminal- 
column, and with or without a pair of contiguous erect flat lobes, teeth 
or keels at the base on the upper side; sometimes short and consisting 
of the basal part bearing the erect pair of contiguous lobes only, the 
terminal portion being undeveloped. Staminal-column arising from 
the bottom of the corolla, sessile or subsessile, the filament part being 
undeveloped, forming a very broad 5-angled truncate cone, from 
the very rigid and horny anther-wings, being exceedingly broad 
and projecting at the base. Anthers with terminal membranous 
appendages inflexed over the apex of the style. Pollen-masses pen- 
dulous, solitary in each anther-cell, attached in pairs to the pollen- 
carriers by broad flat caudicles, which are abruptly bent at the middle. 
Style truncate or depressed at the apex, not exceeding the anther- 
appendages. Follicles solitary (always ?), coriaceous, usually winged, 
at least on the apical part, sometimes toothed or echinate along the 
wings. Seeds crowned with a tuft of hairs.—Erect herbs. Leaves 
opposite, broad. Flowers in umbels, lateral at the nodes of the uppét 
part of the stem, moderately large. 
Species several, chiefly South African. 
This genus has not been recognised by any author since it was estublished by 
E. Meyer in 1837. Decaisne, Bentham & Hooker and K. Schumann include 1t ™ 
Gomphocarpus, D. Dietrich includes it in Xysmalobium and Schlechter in Asclepras. 
But the broad sessile truncate core formed by the anthers with their exceedingly 
broad and very rigid wings, the very different coronal structure and different 
character of the fruit, appear to me to be sufficient grounds for retaining athe 
a distinct genus, to which, besides most of those referred to it by E. Meyer, I woul 
refer the following species :— 
P. transvaalensis, N. E. Br. (Asclepias transvaalensis, Schlechter) ; P. 
macrochilus, N, BE, Br. (A, macrochila, Schlechter); P. schinzianus, N. E. Br. 
