Castanopsis costata
Content
Description
Tree, 10-36 m by 15-80 cm ø;
Branchlets when young densely set with fulvous bundle-hairs, later glabrescent, slender, greyish or blackish brown, with many minute lenticels;
Leaves sometimes thickly coriaceous, (9-)14-17(-25) by (4-)5-8(-10) cm (index (1.7-)2.5(-3.2)), widest at or below the middle to sometimes above;
Stipules linear-triangular, 13 by 1½ mm.
Fruits 1-3 per cupule, more or less conical, 1½-2 by 1-1½ cm, the scar covering ¼ part, convex;
Distribution
Asia-Tropical: Borneo present; Malaya (Peninsular Malaysia present); Sumatera (Sumatera present), Banka present, Billiton Is present, Laut present, Nunukan Is present, Perak present
Malesia: Sumatra (scattered), also Banka and Billiton Is., Malay Peninsula (Perak), Borneo (scattered all over), also Laut and Nunukan Is.
Notes
The cupule resembles those of C.fuha and C. foxworthyi, but the leaf is different.
In SAN 27360 from North Borneo, in young fruit, the leaves are completely glabrous, and glaucous underneath.
In SAN 16445, SAN 28260, CLEMENS 10791 and 32169, all from Mt Kinabalu, the leaves, although with the characteristic close, parallel nerves, have underneath the long hairs much more densely set than in the other specimens; the young twigs being also very densely hairy. In SAN 16445, the fruit is 5½ cm in largest ø, the spines being very sturdy and 1-2 cm long.
In SAN 27360 from North Borneo, in young fruit, the leaves are completely glabrous, and glaucous underneath.
In SAN 16445, SAN 28260, CLEMENS 10791 and 32169, all from Mt Kinabalu, the leaves, although with the characteristic close, parallel nerves, have underneath the long hairs much more densely set than in the other specimens; the young twigs being also very densely hairy. In SAN 16445, the fruit is 5½ cm in largest ø, the spines being very sturdy and 1-2 cm long.