110 Lxxxiv. APOCYNACE^ (stapf). [Rauioolfia. 



1. R. xnacrophylla^ Stwpf in Kew Bulletin, 1804^, 20. A tree, 

 40-50 ft. high, quite glabrous ; young branches stout, ^-winged, dark 

 brown or blackish. Leaves in whorls of 4, lanceolate or oblong- 

 obovate, obtuse or subacute, long cuneate at the base and decurrent 

 into the short or indistinct petiole, 6-8 in. long, 2L-8 in. broad, firmly 

 membranous; secondary nerves 10-24 on each side, straight, sub- 

 horizontal ; veins forming a faint netw^ork beneath. Flowers shortly 

 pedicelled, in dense cymes on the ends of the secondary rays of large 

 umbels; peduncles IJ--^) in. long ; primary rays |-2 in. long, secondary 

 rays 8-9 lin. long ; pedicels in the flower J-1 lin., in fruit up to 2 lin. 

 long. Calyx |-| lin. long ; segments ovate or triangular, acute. 

 Corolla-tube about IJ lin, long ; lobes ovate, obtuse, \-'i lin. long; 

 mouth villous. Style 1 lin. long, glabrous. Fruit a more or less 

 globose or ellipsoid, slightly compressed drupe with usually 2 often 

 unequal pyrenes, about 4 lin. long. — R. gonioclada, K. Schum. and 

 it. lencopoda, K. Schum. MS. 



Upper Guinea. Canieroons : Ambas Bay, Mann, 1328 ! Bipinde, Zenker, 

 1626! 1975! 



2. R. caffra, Sonder in Linncea, xxiii. 77. A large tree, 50-60 ft. 

 high, quite glabrous ; young branches angular or almost terete, stout, 

 blackish-brown when dry. Leaves in whorls of 3-5, unequal, lanceolate, 

 long acuminate, long cuneate at the base, 3-8 in. long, J-1^ in. broad, 

 membranous, rather firm ; secondary nerves 20-30 on each side, straight 

 or curved, subhorizontal ; veins obscui'e or more or less distinct below ; 

 petioles up to 1 J in. long. Cymes dense, at the ends of the secondary 

 or tertiary rays of large umbels ; flowers shortly pedicelled or subsessile ; 

 peduncles 1-2J in. long; primary rays f-lj in. long, secondary rays 

 1-1 in. long. Calyx ^-| lin. long ; lobes ovate, acute. ' Corolla white ; 

 tube 1 J-2 lin. long, mouth very hairy ; lobes ovate, very short, subacute. 

 Carpels connate at the base in the flower, more or less fused in the fruit 

 or usually only one developing; style glabrous, J lin. long; stigma 

 truncate with a reflexed membrane. Fruit a simple drupe (by abortion), 

 obovoid or almost globose, 3 lin. long, or an obcordate twin drupe. 



Soutb Central. Congo Free State : Katanga ; near Lukofii, J'eirlicJc, 618 ! 

 Lake Nivers, Verdick ! 



Also in the Transvaal. The Congo B'ree State specimens differ from those of 

 the Transvaal in the more distinct reticulation of the Jeaves and sessile or subsessile 

 flowers. 



3. R, Welwitschii, Stapf. A tree, 25-35 ft. high, quite 

 glabrous ; young branches angular or almost terete, stout, blackish when 

 dry. Leaves in whorls of 3-4, oblanceolate or lanceolate-oblong, very 

 acute, apiculate or finely and acutely acuminate, acute at the base, not 

 decurrent, 3J-6 in. long, l^-lf in. broad (rarely up to 12 in. long and 

 3|- in. broad), more or less firmly membranous, shining above ; secondary 

 nerves up to 30 on each side, slightly curved or straight, subhorizontal-; 

 veins distinct, dark, loosely anastomosing; petiole h-^\ in. long. 

 Flowers sessile, in dense clusters on the ends of the slender secondary 



