166 
PACIFIC SCIENCE, Vol. Ill, April, 1949 
21a. Alstonia macrophylla var. acuminata 
(Miq.) Monachino, stat. nov. 
"Cofassus Citrina” Rumph., Amb. 3: 30. t. 15. 
1743. 
A. acuminata Miq., in Ann. Mus. Bot. Lugd. 
Bat. 4: 140. 1869. 
A. subsessilis Miq., in Ann. Mus. Bot. Lugd. 
Bat. 4: 140. 1869. 
The calyx lobes are usually more than 1 mm. 
long, sharper at apex than those of the typical' 
form, ciliate, otherwise glabrous; anthers about 
1.1 mm. long. In the material examined the 
leaves are glabrous and their veins are more 
boldly raised than is usual for the typical form; 
the flowers are in poor condition. 
Type. — "Arnboina: et forma foliis anguste 
ovatis obtuse acuminatis in Ceram: Teysmann.” 
Distribution. — Apparently confined to Am- 
boina and Ceram. The typical species is possibly 
found in Celebes to the west, and A. Brassii, 
which is very closely allied to A. macrophylla, 
is in New Guinea to the east; otherwise this 
variety is distantly isolated from the principal 
range of the species and there is no other rela- 
tive from which it might have been derived. 
Arnboina.- — de Fretes 5574 (type coll. A. 
subsessilis; L); de Vries and Teysmann (type 
coll. A. acuminata ; L) ; Neth. Ind. For. Serv . 
25995 (A); Robinson PL Rumph. Amb. 77 
(GH, K, L, NY, US); Teysmann (Herb. Bog. 
5166; K). 
Ceram. — de Vries and Teysmann (L). 
Java. — Hallier f. 43 (cult., Hort. Bot. Bog. 
IV-A-55; L); Merrill (IV-A-55; NY, US). 
Vernacular names (fide Heyne) . — Ajo- 
eran, Aoeran, Oeken, Poele Batoe , Pole . 
" Cofassus Citrina” was referred to A. acumi- 
nata by Heyne ( 1917: 63) and to A. subsessilis 
by Merrill (1917: 427) . Although Rumphius’ 
illustration is poor and his description Is not 
definitive, there is fair circumstantial evidence 
in favor of accepting this identity. Rumphius 
states that the plant is rare and presents the 
following distribution: "Hitoe circa pagum 
Lima, & in Leytimora in montibus Oerimissen, 
item in Java & Baleya.” 
Type of A. subsessilis, ''Arnboina ubi Poe- 
lek-batoe vel Lassi oetan vocatur: De Fretes.” 
It consists of sterile material and is character- 
ized chiefly by its subsessile leaves. Flowers are 
present in Herb . Bog. 5166, which has the leaf 
character of this form. 
Merrill pointed out that IV-A-55 cultivated 
in the botanic garden at Buitenzorg under the 
unpublished name of "Alstonia hoedti T & B.,” 
reported to have originated from Arnboina, is 
apparently identical with A . subsessilis; Dakkus 
( 1930: 17) names the plant A. acuminata. 
22. Alstonia Brassii Monachino, sp. nov. 
A. macrophyllae perintime affinis sed foliis 
glabris, pedicellis brevioribus crassioribusque 
minus quam 3 mm. longis, calcye ca. 2 mm. 
longo, lobis plus quam 1.5 mm. longis extus 
glabris vel glabrescentibus; staminibus prope 
mediam tubi cor oil ae insertis. 
Trees 18-24 m. tall. Petioles 0-1 cm. long; 
leaf blades usually 12-18 cm. long, 4-8 cm. 
broad, glabrous, the lateral nerves 15-20 pairs, 
8-15 mm. apart. Inflorescence sparsely to pro- 
fusely flowered, the ultimate branches less 
spreading than those of A. macrophylla; pedi- 
cels less than 3 mm. long, more robust than 
those of A. macrophylla, about 0.5 mm. in 
diameter; calyx about 2 mm. long, glabrous or 
nearly so; calyx lobes glabrous or glabrescent 
outside; glabrous inside, ciliate; corolla tube 
about 5.6-5. 7 mm. long, glabrous or very 
sparsely pubescent outside; corolla lobes 4.7-7 
mm. long, varying from well-ciliate to eciliate; 
stamens inserted slightly above middle of corolla 
tube, the anthers 1—1.3 mm. long.. 
Type.— L. /. Brass 5138, Papua, Mafulu, 
Central Division, forests of middle and lower 
slopes, altitude 1,250 m., very abundant; Sept. 
30, 1933. (Type, NY. Bot. Gd.; isotype, Arnold 
Arboretum. ) 
Distribution.— The entire island of New 
Guinea; sometimes common. Reported from 
forests at altitudes of 180-1,800 m. 
Papua .—Brass 630 (Bisiatabu; A), 5138 
(type coll); H. O. Forbes 125 (Sogeri Region; 
BM, K, L). 
