Dysoxylum rugulosum
Content
Description
Small tree to 20 m, flowering when a sapling; bole to 20 cm diam.
Bark smooth, brown, to finely fissured and scaling; inner bark yellow-brown, mottled; sapwood cream.
Leaves 20–40 cm, (1) 2–4 (5)-jugate, with a terminal pair of leaflets with a scar between them or one leaflet and a spike or its scar; petiole 6–15 cm, ± finely puberulous, flattened adaxially, conspicuously swollen at base; rachis angled or weakly winged.
Petals 4, c. 8 by 3 mm, elliptic, puberulous without yellowish, valvate.
Staminal tube ± 4-angled, glabrous or sparsely puberulous on angles without, margin crenate to (7–)8(–9)-toothed, the teeth emarginate; anthers (7) 8 (9), c. 1 mm long, elliptic, included.
Ovary pubescent, 4-locular; style puberulent in proximal half; stylehead discoid with basal annulus.
Capsule solitary or paired, 3–5 cm long, c. 2–2.5 cm diam., deeply 3- or 4-lobed, glabrous and orange when mature, drying blackish, veined.
Seeds black (Henderson, l.c.).
Distribution
Asia-Tropical: Borneo (Sabah present, Sarawak present), Bengkulu present, E Kalimantan present, Jambi present, Malacca present, Pahang present, Perak present, Selangor present, sterile present
Malesia: Sumatra (Bengkulu, sterile, Jambi), Malay Peninsula (Perak, Pahang, Selangor, Malacca), Borneo (Sarawak, Sabah, E Kalimantan)
Taxonomy
Dysoxylum brachybotrys may be merely a rather distinct form of this species. Other rather distinctive forms, possibly worth recognizing, but as yet little known, are represented by a number of collections from the Bornean uplands: Sarawak, Kalabit Highlands, 1000 m, Nooteboom & Chai 1652 (L); Lubok Antu, Bukit Langak, 1300 m, Chai S 33824 (L); Mt Mulu, 1500 m, Anderson S 4599 (L); Upper Plieran, S 3430 (FHO); Sabah, Mt Kinabalu, Mesilau R., 1600 m, Chew & Corner RSNB 4250 (L) and SAN 60791 (K).