Revision of Genus Alstonia — Monachino 
139 
erose margins at ends; leaves finely 
pointed at the acuminate apex; small 
shrubs; anthers over 1.4 mm. long 
Blaberopus 
3(2). Follicles connate into a single thick 
capsule Winchia 
Follicles divergent, slender .Pda 
4(1). Seeds rounded to subacute at one end 
and acute to caudate at the other, 
densely - ciliate at ends with long 
coma-like hairs; leaves 3- to 4-verti- 
cillate, lateral nerves distant, reticu- 
lation manifest .....Monuraspermum 
Seeds manifestly narrowed-acute to 
long slender caudate at both ends, 
cilia short, not coma-like; leaves op- 
posite, or rarely both opposite and 
3-verticillate Dissurasp ermum 
Section Winchia (A. DC) Monachino, stat. 
nov. 
Winchia A. DC, Prod. 8: 326. 1844. 
Like § Pala but ovary syncarpous and follicles 
united into a single thick capsule; leaves less 
pale beneath than in § Pala. Known at present 
from a single species. Trees; leaves 3- to 4- 
verticillate, green on both sides or slightly paler 
beneath, the lateral nerves numerous, close, 
parallel, straight or slightly arcuate, horizontal 
or a little ascending; corolla lobes with left 
margins overlapping; anthers located at throat 
of corolla, the filaments attached manifestly 
above middle of corolla tube; ovary syncarpous, 
disc not conspicuous; follicles united into a 
single thick capsule; seeds oblong, rounded at 
both ends, margins thick, glabrous on faces, 
long-ciliate at ends; placental scars linear. 
Type species.-— A. glances cens (K. Schum.) 
Monachino. 
Section Pala (Adr. Juss.) Benth., in Benth. 
and Hook., Gen. PL 2: 705. 1876. 
Pala Adr. Juss., in Ann. Mus. Paris 15: 346. 
1810. 
Subgen. Pala King & Gamble, in Jour. As. 
Soc. Beng. 74(2): 435. 1907 ( in clavis). 
Series Glabrae Pichon, in Paris Mus. d’Hist. 
Nat. Bui. II, 19: 296. 1947. 
Series Pilosae Pichon, in Paris Mus. d’Hist. 
Nat. Bui. II, 19: 296. 1947. 
Trees. Leaves 3- to 11-verticillate, undersides 
pale to strongly cinereous, habitually with micro- 
scopic papillae, the lateral nerves numerous, 
close, parallel, straight or slightly arcuate, hori- 
zontal or a little ascending. Corolla lobes with 
left margins overlapping; anthers located at 
throat of corolla, the filaments attached mani- 
festly above middle of corolla tube; ovary apo- 
carpous, disc not conspicuous. Seeds oblong, 
rounded at both ends, margins thick, glabrous 
on faces, long-ciliate at ends; placental scar 
linear. 
Type species.— In proposing this section, 
Bentham (1876) cited the genus Pala in syn- 
onymy and referred to the illustrations Wight 
Ic. t. 422 and Bedd. FI. Sylv. t. 242. These illus- 
trations are of A. scholaris, and the Jussien Pala 
was also based on the same species. The type 
of section Pala is therefore A. scholaris (L.) 
R. Br. 
Key to Section Pala 
1. Corolla pubescent outside; leaves gen- 
erally broadest above middle, the 
transverse veins and reticulation 
prominulous on upper surface 2 
Corolla glabrous outside 5 
2(1). Inflorescence with flowers in very 
closely crowded cymes, pedicels up to 
3 mm. long; calyx densely tomentose 
outside; corolla lobes quadrate-or- 
bicular, 2.0 to 4.5 mm. long and as 
broad. Plants not of Africa 3 
Inflorescence with flowers more loosely 
disposed; pedicels to 6 or 8 mm. 
long. Africa 4 
3 (2). Leaves glabrous-2. A. scholaris (typical) 
Leaves softly villose on underside.-. 
2a. A. scholaris var. velutina 
4(2). Calyx densely tomentose outside; ovary 
densely pubescent; typical corolla 
tube 6 to 12 mm. long, corolla lobes 
3 to 6 mm. long, about as broad as 
long; follicles tomentose; leaves peti- 
oled, petioles 1 to 2 cm. long 
3. A. Boonei 
Calyx glabrous or sparsely pubescent 
outside; ovary glabrous or nearly so; 
typical corolla tube 4 to 6 mm. long, 
corolla lobes 5 to 9 mm. long, much 
longer than broad; follicles glabrous; 
leaves sessile or almost so, petioles 
less than 0.5 cm. long.... 4. A. congensis 
