288 LXXXV. ASCLEPIADE& (BROWN). | Zoxocarpus. 
Lower Guinea. Lower Congo: Sabuka, near Stanley Pool, Zuja (ex De 
Wildeman & Durand). 
I have not seen a specimen of Rhynchostigma Lujei, De Wild. & Durand, but 
-cannot find any character in the description to distinguish it from 7. brevipes. 
3. 'T. parviflorus, V. #. Br. Very similar to 7. brevipes in all 
characters except that the pubescence on the stem is more spreading, 
the leaves more oblong and less acute, drying light brown or dull grey 
above; the corolla is only 33-4 lin. in diam., with a short campanulate 
tube, and lobes 14-1? lin. long and about 2} times as long as the tube, 
not twisted in the bud. The coronal-lobes are nearly as in 7’. brevipes, 
and the apical part of the style is conoid-fusiform, acute.—Rhynchostigma 
parviflorum, Benth. in Hook. Ic. Pl. xii. 78, and K. Schum. in Engl. 
& Prantl, Pflanzenfam. iv. ii. 287. 
Lower Guinea. Gaboon River, Mann, 983 ! 
Possibly only a small-flowered variety of 7. drevipes, differing in the above par- 
ticulars. 
13. MICROSTEPHANUS, N. E. Br. in Kew Bulletin, 1895, 249. 
Calyx, deeply 5-lobed. Corolla-tube short, campanulate ; lobes 
lanceolate, overlapping and twisted to the left in the bud. Corona of 
5 minute lobes or teeth alternating with the anthers at their base. 
Staminal-column arising a little above the bottom of the corolla-tube ; 
filamental part very short; anthers oblong, erect, very convex on the 
back, their horny margins or wings, which form the fissures leading to 
the stigmatic cavities, being strongly incurved towards the centre of the 
flower, forming 5 grooves between the anthers; appendages suberect, 
membranous. Pollen-masses pendulous, solitary in each anther-cell, 
attached in pairs to the pollen-carriers by very short caudicles. Style 
produced into a beak beyond the anther-appendages. Follicles lanceo- 
late, acuminate, smooth. Seeds crowned with a tuft of hairs. Perennials 
with procumbent or twining stems, opposite leaves, and few-flowered 
umbel-like cymes of small flowers, sublateral between the bases of the 
petioles. 
A monotypic genus, native of Tropical Africa and Madagascar. I have separated 
this genus Astephanus on account of the different structure of the anthers an 
the presence of coronal-lobes, which although minute are distinctly evident when 
searched for. In Astephanus I do not find the slightest trace of a corona, and the 
anther-wings, which form the fissures opening to the stigmatic cavities, are rather 
large and project outwards, but in Microstephanus the anther-wings are less 
developed and are turned inwards towards the centre of the flower and form five 
rather deep grooves between the anthers. which are much more convex on the back 
than are the anthers of Astephanus, The generic name is formed from pxpos 
small, and oredavos, a crown, in allusion to the small corona. 
_1. M. cernuus, V. £. Br. in Kew Bulletin, 1895, 249. A small 
twining or prostrate shrub, pubescent with short curved hairs on the 
young stems all over or only along one line, and on the under or bo 
sides of the leaves, or entirely glabrous. Leaves spreading; petiole 
