Horsfieldia
Content
Description
Tree c. 5 m.
Leaves membranous, oblong-lanceolate, 12-21 by 4-6(-6.5) cm, base (rounded-) attenuate, apex acute-acuminate;
Inflorescences among the leaves, pubescent, hairs 0.3-0.5 mm long;
Fruits 1-3 per infructescence, ellipsoid, apex and base subobtuse, 1.4-1.5 by 1-1.1 cm, glabrous, drying dark brown, finely granulate, lenticel-like tubercles absent;
Distribution
Asia-Tropical: Borneo present (Brunei present, Sarawak present), Miri Dist present
Malesia: Borneo (Sarawak: Miri Dist.; Brunei).
Taxonomy
Related to H. paucinervis, but H. gracilis is distinguishable by its more slender habit, thin membranous leaves and (sub)persistent rough indumentum on leaf bud, twig apex and lower leaf surface, especially on the midrib and nerves, and by the small fruits with persistent perianth. Superficially the species may be taken for H. macilenta or H. tenuifolia. For a more extensive discussion, see De Wilde 1996.