Revision of Genus Alstonia — MON ACHING 
143 
2(1). Corolla lobes manifestly ciliate; in- 
florescence very sparsely and 
loosely flowered; leaves with nu- 
merous lateral nerves (about 40 
pairs); seeds about 16 mm. long, 
slender-caudate at both ends. New 
Caledonia 26. A. lanceolata 
Corolla lobes not ciliate or very ob- 
scurely and sparsely so 3 
3(2). Corolla tube minutely puberulent 
outside near middle, 8 to 9 mm. 
long, corolla lobes shorter than 
tube; inflorescence with branch- 
lets and pedicels adpressed or as- 
cending; leaf blades 9 to 36 cm. 
long and 4 to 22 cm. broad, dull 
on upper surface, not retuse at 
apex; seeds 7 to 9 mm. long, the 
tails short, less than 2 mm. long. 
New Caledonia 27. A. Vieillardi 
Corolla tube glabrous outside, less 
than 7 mm. long 4 
4(3). Inflorescence strongly divaricate, lax; 
corolla tube 2 to 3 mm. long; 
leaves with about 30 or more pairs 
of lateral nerves. New Caledonia. 
( Species not seen. ) 5 
Inflorescent branches divaricate to 
erect; combination of characters 
not as above. Species difficult to 
distinguish; best recognized by 
combination of many characters. 
( Species seen, except A. plumosa . ) 
-r~- .l. 6 
5(4). Leaf blades linear-lanceolate, 5 to 9 
cm. long and 0.5 to 0.8 cm. broad; 
branches slender. (Not seen.) 
37. A. s align a 
Leaf blades oblong-oblanceolate, 12 
to 25 cm. long and 3 to 6 cm. 
broad. (Not seen.) 
38. A. Comptonii 
6(4). Seeds 12 to 24 mm. long, slender- 
caudate at both ends, tails long, 4 
to 9 mm. long, fork distant from 
body of seed; principal lateral 
nerves up to 25 pairs 7 
Seeds 4 to 12 mm. long, short-cau- 
date, tails 1 to 4 mm. long, forked 
near body of seed; leaves glabrous 
11 
7(6). Leaf blades 2.5 to 11 cm. long and 
1.2 to 3.5 cm. broad, rounded to 
somewhat acute at apex; corolla 
lobes oblong, pubescent the entire 
surface within; follicles 7 to 13 cm. 
long; seeds 24 mm. long. New 
Caledonia. ( Not seen. ) 
29. A. plumosa 
Leaf blades larger or seeds shorter 8 
8(7). Leaf blades 14 to 28 cm. long and 
3 to 15 cm. broad, usually acumi- 
nate at apex, glossy above, lateral 
nerves 16 to 25 pairs; corolla lobes 
oblong-lanceolate; follicles up to 
22 mm. long. Plants of New Cale- 
donia 28. A. Roeperi 
Leaf blades dull to somewhat shining 
above, lateral nerves 10 to 17 
pairs; corolla lobes linear-lanceo- 
late. Plants not of New Caledonia 
9 
9(8). Branchlets usually very stout, peti- 
oles 2.5 to 9 cm. long, usually con- 
spicuously fossate at axil; leaf 
blades often very large (6-) 8 to 
45 cm. long and 4 to 27 cm. broad, 
lateral nerves (10-) 12 to 16 pairs 
Branchlets not stout; petioles 1.5 to 
3 cm. long, not conspicuously fos- 
sate at axil; leaf blades usually 7 
to 20 cm. long and 3 to 9 cm. 
broad, glabrous or rarely villose 
beneath, lateral nerves usually 10 
to 13 pairs. Transitional species 
31. A. Reineckeana 
10(9). Leaf blades elliptic, usually rounded 
to short-acuminate at apex and 
rather obtuse at base; corolla tube 
2.2 to 4.4 mm. long. Solomon 
Islands to Fiji and Samoa.. 
30. A. vitiensis (typical) 
Leaf blades lanceolate, usually greatly 
narrowed at apex and base; corolla 
tube 2.2 to 3 mm. long. New Heb- 
rides 
....30a. A. vitiensis var. novo-ebudica 
11(6). Leaf blades oblanceolate, about 3 to 
4.5 cm. long and 1.2 cm. broad, 
retuse at apex, lateral nerves as- 
cending, about 14 pairs; inflores- 
cence short, sparsely flowered, 
branches rather erect; corolla tube 
about 6 mm. long, corolla lobes 2.5 
mm. long, faintly pubescent out- 
side; stamens inserted near base of 
corolla tube. New Caledonia 
34. A. Deplanchei 
Leaf blades rounded to acuminate at 
apex, rarely slightly retuse; corolla 
tube 2 to 6 mm. long, corolla lobes 
glabrous outside 12 
