82 xc. convolvulace^e (baker and rendle). [Prevostea. 



1. P. africana, Benth. in Hook. Niger Fl. 469, t. 46. A climbing 

 shrub ; branchlets slender, woody, subgiabrous, 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, narroAved 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 fiat 

 membranous reticulately veined suborbicular structure with cordate 

 base and overlapping lobes 2-2 \ in. long, the inner ellipsoidal, similar 

 in texture but smaller, about \\ in. long. Corolla whitish, ■§- f 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. 

 Disc obsolete. Ovary incompletely 2-celled, 4-ovuled. Fruit 1-celled, 

 1 -seeded, presumably inclehiscent but not seen ripe. — P. altemi- 



folia, Hallier f. in Engl. Jahrb. xviii. 92 ; Darumer in Engl. Jahrb. 

 xxiii. Beibl. 57, 57. Godonanthus africanus, G. Don, Gen. Syst. iv. 

 166. 0. alternifolia, Planch, in Hook. Ic. t. 796. Breweria Godonanthus, 

 Baker ex Oliver in Hook. Ic. PI. 2276. B. altemifolia, Radlkof. in 

 Abhandl. Nat. Ver. Bremen, viii. 413 in note. 



Upper Guinea. Sierra Leone : near Kaf'ogo, Scott-Elliot, 5518 ! and with- 

 out precise locality, Don ! Lagos, Moloney ! Cameroons : Yaunde, Zenker, 713 ! 

 799 ! Bipinde, Zenker, 2662 ! 



2. P. micrantfoa, 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 4J in. long 

 and 2^- 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, 1| 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 3 lin. long, tripartite to the middle. Stigmas 

 orbicular, glabrous. 



Upper Guinea. Cameroons : Johann-Albrechtshohe, Staudt, 637 ! 



3. P. campamilata, K. Solium ex Peter in Engl. <t Prantl, Pflan- 

 zenfam. iv. 3 A. 17. A climbing shrub ; branchlets slender pubescent. 

 Leaves obovate-oblong, cuspidate, subcoriaceous, 3-5 in. long, l|-3 in. 

 broad, narrowed from the middle to a 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 



