584 ASCLEPIADEZ (Brown). [ Periglossum. 
Also in Tropical Africa. 
The figures of the anther and pollinia, as given by Schlechter, are very 
inaccurate, 
3. P. kassnerianum (Schlechter in Engl. Jahrb, xx. Beibl. 
51, 40); plant 2-1 (2-14 ft., Schlechter) ft. high; stem’ solitary, 
simple, slender, more or less puberulous on the upper part; leaves 
erect or ascending, 23-3} in. long, } lin. broad, linear-filiform, with 
revolute margins, acute, glabrous ; umbels 1-3, pedunculate, globose, 
densely many-flowered, 3-2 in. in diam.; peduncles 4-2} in. long ; 
bracts 12 lin. long, linear-subulate; pedicels very’ short, scarcely 
2 lin, long, puberulous; sepals 13-2 lin. long, $ lin. broad, lanceo- 
late, acute, puberulous; corolla-lobes 3 lin. long, 14. lin. broad, 
oblong-lanceolate, acute, suberect, slightly concave at the basal part, 
slightly convex with revolute margins above, recurved at the apex, 
glabrous on both sides, apparently greenish, more or less tinted with 
purple-brown on the back; corona-lobes much overtopping the 
staminal column, erect and slightly incurved-connivent at the middle, 
2-22 lin. long, 1 lin. broad, stalked, with the oblong or ovate-oblong 
obtuse blade about 23 times as long as the linear stalk, cordate or 
cordate-sagittate at the base, concave on the back, thickened on the 
upper half of the inner face into a stout 2-ridged keel, which ends 
at the middle of the lobe in a small flap resting on the top of the 
basal keels ; alternating with the lobes at their base are 5 minute 
almost rudimentary filaments; staminal column 14 lin. long, sub- 
globose ; anther-cells curved on the back, very firm, with a mem- 
branous connective between them, triangularly thickened. at. the 
truncate apex, from which, in ‘young flowers, the broadly ovate 
obtuse anther-appendages are horizontally inflexed, vverlap and form 
a pentagonal white canopy, entirely concealing the small knob-like 
style-apex and top of the column, but are soon eaten away by insects ; 
pollen-masses flattened, crescent-like, obtuse at both ends, slightly 
translucent near the free end ; eaudicles about twice as long as the 
pollen-masses, slender, slightly curved at the upper half, shortly and 
abruptly very much curved at the lower half, attached to a minute 
black pollen-carrier. Schilechter‘in Journ, Bot, 1896,'450. 
Katanart Reeion: Transvaal; near Rustenberg, 4000 ft., Miss Pegler, 
1010! 1022! near Klein Olifants River, 5000 ft., Schlechter, 4043! Modder- 
fontein, Conrath, 982! : #3 ; 
4. P. McKenii (Harv. Thes. Cap. ii. 7, t. 111) ; stem 2-2} ft. 
high, unifariously (bifariously, Harvey) puberulous on the upper 
part, with internodes 14-31 in. long; leaves sessile, widely spread- 
ing, 31-42 in. long, 3-11 lin. broad, linear, acute, with revolute 
margins, glabrous above, puberulous on the midrib beneath ; umbels 
about 5, lateral at the nodes, pedunculate, globose, about } in. in 
diam., many-flowered ; peduncles 3-2 in. long, puberulous along 
one side; pedicéls 2-1 lin. long, puberulous; sepals: 14-1} lin. 
