Rauwolfia.} LXXXIV. APOCYNACEE (STAPF). 109 
Umbels contracted ; peduncles up to 1 in. 
long; calyx 5-partite; segments very 
broad, distinctly overlapping at the 
base; leaf-reticulation rather close, 
distinct : . 5. R, ochrosioides, 
Umbels lax ; - peduncles 2— 3h in. long ; “calyx 
less divided : segments ie over lapping 
or not at all; “leaf-reticulation very 
lax, faint. 
Blades lanceolate to oblanceolate, about 
4. times as long as broad. 
Secondary nerves 25-30 on each side, 
subhorizontal, straight or slightly 
curved ; calyx-segments slightly 
overiapping at the base; corolla- 
tube 23 lin. long : . 6. BR. inebrians. 
Secondary nerves 16-20 on each side, 
oblique, curved; calyx  cup- 
shaped, 5- toothed ; ; corolla-tube 
13-2 lin. long . . 7. R, obliquinervis, 
Blades lanceolate- -obiong or elliptic, 2-3 
times as long as broad. : = 10... Gotzer. 
t+Young branches slender; leaf whorls distant; leaves thinly membranous, acute 
to caudate-acuminate ; flowers distinctly pedicelled, in small umbels or racemiform 
cymes ; fruit a twin dr upe, with the two halves connate to or beyond the middle, but 
separated by a groove on each side, or quite free, or more usually (by abortion) a 
simple, often asymmetric drupe, scantily fleshy and often laterally compressed. 
Leaves caudate-acuminate ; flowers on short pedicels in 
usually paired r acemiform or subscorpioid cymes ; 
fruit halves (if both are developed) connate to 
or beyond the middle, separated by a groove on 
each side, strongly laterally compressed. 
Branches 4-angular when young, with more or less 
conspicuous decurrent raised lines : 5 9. Re Manny, 
Branches terete, without decurrent lines. 
Peduncles rather stout. : ‘ ; . 10. R. Prewssit. 
Peduneles filiform . : a Ebi rosea: 
Leaves acute or acuminate, scarcely ever caudate ; 
flowers on slender, short or long pedicels at the 
ends of the secondary or tertiary rays of a com- 
pound umbel or in repeatedly dichotomous cymes 
arranged in umbels ; fruit halves (if both are 
developed) quite free, divaricate, compressed or 
not. 
Drupes laterally much compressed, 4-5 lin. long . 12. 2. Cumminsii. 
Drupes ellipsoid, 3-34 lin. long. 
Inflorescence glabrous ; ‘style glabrous : . 13. R. mombasiana. 
Inflorescence pubescent; style villous at the 
base ; : : : : . . 14. R. vomitoria. 
**Corolla-tube 6 lin. long; mouth not villous; lobes at 
least 3 the length of the tube; stamens inserted 
below the middle . 5 : : ‘ 2 . 18. R. Volkensii. 
iy 
CH 
