Revision of Genus Alstonia — MONACHINO 
Northeast New Guinea.— M. S. Clemens 862 
(Morobe District, Sattelberg; A), 124 and 4567 
(Morobe District; A); Schlechter 16255 
( Kaiser- Wilhelmsland, Wobbe; A, Bri, F, G, 
L), 19663 ( Kaiser- Wilhelmsland, Dischore; A, 
Bri, F, G, K, L); For. Herb. N. Guinea 571 
(Joangey; Bri; " Qwetd ’). 
Netherlands New Guinea— Neth. hid. For. 
Serv. 30363 ( Seroei, Japen; A). 
The type has been identified by Markgraf 
(in herb.) as A . macrophylla var. glabra , and 
other specimens both as A. macrophylla var. 
glabra and A . paucinervia (Markgraf, 1927: 
178, 179). The original variety, however, is 
not separable from typical A. macrophylla , with 
which the dubious A. paucinervia is probably 
also synonymous. The conclusion that A. Brassii 
is distinct from A. glabriflora is based almost 
solely upon the description of Markgrafs 
species. Markgraf examined all of the speci- 
mens here cited under A. Brassii and did not 
identify any of them with his A. glabriflora . 
The type is noted as a tree up to 20 m. tall; 
sap milky; leaves glossy; flowers numerous, 
foetid, corolla tube pale pink, lobes cream- 
colored. C T. White (1929: 260) describes 
630 as a tall and slender laticiferous tree, 18-24 
m. tall, 50-60 cm. girth, unbranched to near 
top, wide light-crowned. 
23. Alstonia glabriflora Markgraf, in Bot. 
Jahrb. 61: 179. 1927. 
Leaves small, 12-20 cm. long, glabrous. 
Calyx 2 mm. long, glabrous, the lobes erect, 
ciliate; corolla glabrous outside, the tube 4 mm. 
long, the lobes oval, 2 mm. long, twice as long 
as wide, at most two-thirds as long as tube, 
glabrous above, ciliate only toward the base; 
anthers inserted near throat, 1 mm. long. ( Com- 
piled from the original description.) 
Type.' — "Nordost-Neuguinea : Sepikgebiet, 
Felsspitze, im montanen Busch wald, 1400- 
1500 m. ii M., bliihend 6 Aug. 1913 — Leder- 
mann 126495 
24. Alstonia linearis Benth., FI. Austral 4: 
314. 1869. 
167 
Branchlets very slender, 2 mm. or less in 
diameter, leaves narrowly linear, 4-9.5 cm. long 
and only 1.5-3 mm. broad, often falcate, lateral 
nerves about 40 pairs, about 1 mm. apart. 
Flowers not known. 
Cotypes. — "N.. Australia. Cliffs of Bruns- 
wick Bay and Regent’s River, N.W. coast, A. 
Cunningham 
Lectotype. — A. Cunningham s.n ., Western 
Australia, north coast, cliffs of Brunswick Bay; 
fruiting, 1820. (Kew.) 
Distribution.— Known only from the origi- 
nal collections on the coast of the Kimberley 
Division of Western Australia. 
Western Australia. — A. Cunningham s.n. 
(type), 204 (coll no. ?; Regent Rv.; K). 
§ DISSURASPERMUM 
Shrubs or small trees, 1-15 m. tall, often of 
greatly varying sizes in the same species. Leaves 
opposite, except in A. Legouixiae (and A. 
saligna?) where 3-verticillate as well as op- 
posite; petioles manifest, slightly dilated at base; 
blades usually more or less elliptic and cuneate 
at base, sometimes coriaceous, the reticulation 
manifest except in the thickly coriaceous leaves. 
Calyx lobes ovate, usually 0.6-2 mm. long, and 
1-2 mm. broad, obtuse to somewhat acute at 
apex, rarely ciliate (A. consthcta ), otherwise 
glabrous; corolla tube short, mostly 2-5 mm. 
long, glabrous outside or rarely minutely puber- 
ulent; corolla lobes mostly longer than corolla 
tube, usually glabrous outside, rarely manifestly 
ciliate, sometimes with very faint sparse micro- 
scopic cilia; stamens inserted mostly at about 
middle of corolla tube; anthers generally 0.7- 
1.5 mm. long; ovary glabrous, the style short, 
usually 0.5- 1.5 mm. long. Follicles slender, 
glabrous; seeds usually with a more or less 
elliptic body which is lightly pubescent on faces, 
generally about 2 mm. broad, the tails varying 
from entire to lightly lobed to deeply bifurcate. 
Representatives of this section are common 
from Australia to the far eastern Pacific. 
In the Pacific islands east of New Caledonia, 
starting from the New Hebrides and extending 
to the Marquesas, there are only two clearly dis- 
