REINWARDTIA

Vol. 10, Part 4. pp. 471 (1988)

LAUMONIERA H.P. NOOTEBOOM (SIMAROUBACEAE)
REDUCED TO BRUCEA J.F. MILL.

A.J.G.H. KOSTERMANS
Herbarium Bogoriense, Bogor, Indonesia-

ABSTRACT

Comparison of all the collected material, together with the cursory
description of Laumoniera Nooteboom, made it clear that the only diffe-
rence with the genus Brucea is the shape of the stigma. This is not con-
sidered to be at the generic level and the genus is sunk into Brucea and the
species renamed Brucea bruceadelpha (Nooteboom) Kostermans, comb,
nov.

Nooteboom (in Blumea 32:383-384) stated that Laumoniera, closely re-
lated to Brucea, differs from the latter by the paripinnate leaves, the stigmas
being connate and discoid and the fruit much larger. The last character can be
discarded, as it is not a generic character. Moreover the fruit are in shape
and texture exactly like those of Brucea.

In the material which I could examine thanks to the cooperation of Dr.
Laumonier (two collections: Laumonier 5727 and Torquebiau 202), both
from Jambi Province, Sumatra, there are 50 per cent pinnate and 50 percent
imparipinnate leaves.

The leaflets show a few tiny glands on the lower surface, but Noote-
boom omitted to mention, that they are not opposite and although Brucea
javanica has as a rule serrate leaflets, in Br. mollissima they are entire.

The only remaining difference is the shape of the stigmas and this is
not a character of generic value.

In the genus Quassia (Nooteboom in-Fl. Males., Ser. 1, 6(2): 198.1962)
species are incorporated with both pari and imparipinnate leaves and the fact
that both occur on the same tree in Brucea bruceadelpha, proves that it is
not even a character at the specific level. Moreover in Quassia there are species
with entire leaves. In the same genus species occur with lobed and with capit-
ate stigmas.

Brucea bruceadelpha (Nooteboom) Kostermans, comb. nov. (basionym:
Laumoniera bruceadelpha Nooteboom in Blumea 32: 383. 1987).

The fresh fruit is smooth and glossy. In Torquebiau's specimen
(Jambi, Batang Ulu, W. of Muarabungo, tree 14 m, dbh 18 cm, Jan., fr.,
Torquebiau 202 in B O ) the fruit are elongate, pear-shaped, 7 x 4 cm; the
largest fruit found in Laumonier's material was 7 x 4 cm. The holo-type was
collected in January.

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