82 XC, CONVOLVULACEE (BAKER AND RENDLE). [ Prevostea. 
1. P. africana, Benth. in Hook. Niger Fl. 469, t. 46. A climbing 
shrub ; branchlets slender, woody, subglabrous, dark brown. Leaves 
narrowly obovate-oblong, abruptly long-acuminate, subcoriaceous, 
glabrous above, glabrescent below, 5-6 in. long, 1}—2 in. broad at the 
middle, narrowed gradually to the base; petiole 6—9 lin.long. Flowers 
2-5 in cymes sessile in the axils of the leaves; bracts minute, linear, 
ferrugineo-pubescent ; pedicels slender, obscurely pubescent, barely 
1 lin. long. Outer sepals broadly cordate-ovate, obtuse, the outermost 
reaching 6 lin. long, the 3 inner much smaller, ovate, acute, all 
sparsely puberulous. The outer larger, forming in the fruit a flat 
membranous reticulately veined suborbicular structure with cordate 
base and overlapping lobes 2—2} in. long, the inner ellipsoidal, similar 
in texture but smaller, about 1} in. long. Corolla whitish, 3—3? in. long ; 
tube suburceolate ; limb spreading; lobes short, broad. Stamens 
shorter than the corolla-tube; filaments dilated at the base, glabrous. 
Style bifid but not to the middle. Stigmas large, peltately ellipsoidal. 
Dise obsolete. Ovary incompletely 2-celled, 4-ovuled. Fruit 1-celled, 
1-seeded, presumably indehiscent but not seen ripe.—/P. alterni- 
folia, Hallier f. in Engl. Jahrb. xviii. 92; Dammer in Engl. Jahrb. 
xxiii. Beibl. 57, 57. Codonanthus africanus, G. Don, Gen. Syst. iv. 
166. C. alternifolia, Planch. in Hook. Ic. t.796. Breweria Codonanthus, 
Baker ex Oliver in Hook. Ic. Pl. 2276. B. alternifolia, Radikof. in 
Abhandl. Nat. Ver. Bremen, viii. 413 in note. 
Upper Guinea. Sierra Leone: near Kafogo, Scott-Elliot, 5518! and with- 
out precise locality, Don! Lagos, Moloney! Cameroons: Yaunde, Zenker, 713! 
799! Bipinde, Zenker, 2662! 
2. P. micrantha, Dammer in Engl. Jahrb. xxiii. 57, A shrub 
7-9 ft. high; branches long, slender, densely puberulous when young, 
ultimately glabrous. Leaves elliptic or obovate, nearly 44 in. long 
and 24 in. wide, apex long acuminate, base rounded to truncate; 
median nerve adpressed puberulous beneath, ultimately glabrous ; petiole 
barely 6 lin. long, adpressed puberulous. Flowers 6-8, on very short 
axillary puberulous peduncles, 14 lin. long. Two outer sepals cordate- 
ovate, membranous, 2 lin. long, sparsely puberulous outside, the 
three inner ovate, acute, 1 lin. long, with ciliate margin. Corolla about 
4 lin. long, white, urceolate; tube very short, sparsely puberulous 
below the ovate acute lobes. Stamens unequal, filaments less than 
1 lin, long, thickened at the base, puberulous to the middle. Ovary 
ovoid, glabrous; style 8 lin. long, tripartite to the middle. Stigmas 
orbicular, glabrous. | 
Upper Guinea. Cameroons: Johann-Albrechtshéhe, Staudt, 637! 
3. P. campanulata, K. Schum ex Peter in Engl. & Prantl, Pflan- 
zenfam. iv. 3A. 17. A climbing shrub; branchlets slender pubescent. 
Leaves obovate-oblong, cuspidate, subcoriaceous, 3—5 in. long, 14-3 in. 
broad, narrowed from the middle toa rounded base, shining and glabrous 
above, opaque and pubescent beneath; petiole under 1 in. long. Flowers 
in sessile axillary cymes ; pedicels silky, under 1 in. long. Calyx 4-6 
