110 LXXXIV. APOCYNACE& (STAPF), | Rauwolfa. 
1. R. macrophylla, Stapf in Kew Bulletin, 1894, 20. A tree, 
40-50 ft. high, quite glabrous: young branches stout, 4-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, 2}—3 in. broad, firmly 
membranous; secondary nerves 16-24 on each side, straight, sub- 
horizontal; veins forming a faint network beneath. Flowers shortly 
pedicelled, in dense cymes on the ends of the secondary rays of large 
umbels ; peduncles 14~3 in. long ; primary rays }-2 in. long, secondary 
rays 3-9 lin. long; pedicels in the flower 4-1 lin., in fruit up to 2 lin. 
long. Calyx 3-} lin. long; segments ovate or triangular, acute. 
Corolla-tube about 14 lin. Jong; lobes ovate, obtuse, }-% lin. long; 
: : : Ss 
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. yonioclada, K. Schum, and 
R. leucopoda, K. Schum. MS. 
Upper Guinea. Cameroons: Ambas Bay, Mann, 1328! Bipinde, Zenker, 
1626! 1975! 
2. R. caffra, Sonder in Linnea, 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, $-14 in. broad, 
membranous, rather firm ; secondary nerves 20—30 on each side, straight 
or curved, subhorizontal ; veins obscure or more or less distinct below; 
petioles up to 14 in. long. Cymes dense, at the ends of the secondary 
or tertiary rays of large umbels ; flowers shortly pedicelled or subsessile ; 
peduncles 1-2) in. long; primary rays #-1}4 in. long, secondary rays 
}-1in. long. Calyx 3-2 lin. long ; lobes ovate, acute. Corolla white; 
tube 14-2 lin. long, mouth very hairy ; lobes ovate, very short, subacute. 
Carpels connate at the base in the flower, more or less fused in the frait 
or usually only one developing; style glabrous, 4} lin. long; stigma 
truncate with a reflexed membrane. Fruita simple drupe (by abortion), 
obovoid or almost globose, 3 lin. long, or an obcordate twin drupe. 
South Central. Congo Free State : Katanga ; near Lukofa, Verdick, 618 ! 
Lake Nivers, Verdick ! 
Also in the Transvaal. The Congo Free State specimens differ from those of 
the Transvaal in the more distinct reticulation of the leaves 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, 3-6 in. long, 14-12 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 5 
veins distinct, dark, loosely anastomosing; petiole 3-1} in. long. 
Flowers sessile, in dense clusters on the ends of the slender secondary 
