R E I N W A R D T I A
Published by Herbarium Bogoriense, Kebun Raya Indonesia

Volume 2, Part 1, pp. 131 -132 (19521

AN ADDITIONAL NOTE ON VIBURNUM CLEMENSAE KERN
J. H. KERN"

In "Reinwardtia" (1: 157. 1951) I published a new species of Vibur-
num from Mount Kinabalu, Borneo, under the name of V. clemensae. The
description was drawn up after fruiting specimens in the Herbarium of
the Arnold Arboretum. Unfortunately flowers were wanting in the
specimens available. Some time ago Dr. A. J. G. H. Kostermans came
across much more complete material among the indeterminata of the
Bogor Herbarium, profusely flowering as well as fruiting. This enables
the amplification of the description.

FIG. 1. Viburnum clemeusae Kern: a, flower; 6, ovary; e, part of corolla; d, stamen;
e, flower-bud; /, fruit; g, cross-section through fruit; a — e, 20 x ; f — g, 3 x.

Evergreen shrub or small slender tree, up to 7.5 m tall. Branchlets
crooked, terete, hardly lenticellate, glabrous, with greyish brown, cracking-
bark. Petioles channelled above, glabrous, 1—2.5 cm long. Leaf-blades
coriaceous, dull, in dry state olivaceous or brownish olivaceous above,
yellowish or brownish green beneath, glabrous on both sides, minutely
papillose-rugulose all over (under a magnifying glass), glandular pitted
at the under side both in the axils of the primary and of the secondary
side-nerves, elliptic to lanceolate or slightly obovate, 9—12 cm long,
2.5—5.5 cm wide, often inequilateral and somewhat falcate; apex abruptly
short-acuminate to nearly caudate, rarely rounded; base cuneate and

::;) Botanist, Herbarium Bogoriense, Kebun Raya Indonesia.

— 131 —



1 3 2 R E 1 N W A R D T I A [VOL. 2

slightly decurrent on the petiole; margin entire, cartilaginous, somewhat
revolute in dry state; midrib and primary side-nerves rather indistinct
above, prominent beneath, the latter ones arcuately ascending, evanescent
and arcuately anastomosing near the margin, 4—5 on each side of the
midrib; veins indistinct. Inflorescence terminal, nearly sessile, loose, up
to 8 cm long and 10 cm wide, paniculate, 2—3 times paniculately branched,
the lowest branches 2—5 together, the middle ones opposite, the upper
ones alternate; bracteoles minute, ovate to lanceolate, sparsely setulose,
caducous, leaving ciliate scars. Calyx-limb distinctly lobed; lobes ovate-
triangular, rather obtuse, glabrous, about 0.5 mm long and wide. Corolla
glabrous, white or creamy, small, about 3 mm wide, rotate, globular in
bud; tube very short, about 0.25 mm long; lobes ovate, somewhat cucullate
at the top, about 1.25 mm long, 1 mm wide. Stamens exserted, but much
shorter than the corolla-lobes; filaments adnate near the base of the
corolla, flattened, tapering towards the apex, about 1 mm long, 0.25 mm
wide, in bud inflexed at the top: anthers broad, anthercells ovate, about
0.5 mm long. Ovary obconical; style very short, depressed-conical; stigma
obcurely 3-lobed. Drupe ellipsoid or oblong-obovoid, not compressed, slight-
ly grooved on the ventral side, (8—)9—11(—12) mm long, 6—8 mm
across, shining; mesocarp thin, scantily fleshy; endoearp thin, strongly
incurved, the dorsal side orbicular in cross-section, the edges touching,
the ventral side folded to an internal longitudinal crest which is 2—2.5
mm broad, slightly widened at the upper margin, here embracing a cavity
of 0.5—1 mm in diameter. Seed dorsiventrally compressed, reniform in
cross-section, 2—3 mm thick.

In the first key to Viburnum, published in "Reinwardtia" on page
113, V. demensae may be distinguished by an alteration in the choices
provided under no. 6 as follows:
6. Corolla not distinctly tubular, the tube less than 3 times as long as the lobes, the

latter usually more than 1 mm long:
6 b f . Leaves entire 14. V. demensae
6 his Leaves crenate-dentate:

8. Inflorescence shortly pyramidal, etc.

SPECIMENS EXAMINED.— BORNEO. C o l o n y o f N o r t h B o r n e o . Mt. Kina-
balu: tree, fruit red, Aug. 3, 1937, ./. A. Griswold Jr. 96 ( A ) ; Gurulau spur, Nov. 1915,
Clement! 10826 (BO) ; Tenompok, summit jungle trail to Tomis, shrub, flower-buds
green, fruit light green, 5000—5600 ft., May 2, 1932, Clemens 29466 (A, BO) ; below
Lumu, jungle ridge, 5600 ft., slender tree 20 ft., fruit red, June 9, 1932, Clemens
"9978 (A, BO); Tenompok, Tomis summit, tree 15 ft., fruit pink, turning red, May 3,
1932, Clemens :3O356 {A, BO) ; Penibukan, 4000—5000 ft., ridge \V of camp, tree 25 ft.,
flower-buds creamy, Feb. 7, 1933. Clemens 31500 (A, BO); Marai Parai, trail to
Sadikan H., forest with Gnetum, r a t t a n , and Admamha (?), 5000 f t , slender tree
25 ft., flowers white, fruit green turning to red, March 23, 1933, Clemens 32320 (BO).


	132
	133