Volume 9 > Part 3 > Year 2008 > Page 341 > Fagaceae > Lithocarpus

52. Lithocarpus tubulosus (Hickel & A.Camus) A.Camuswfo-0000230303

Rivièra Sci. 18: 42. 1932; Chênes 3.2: 782. 1954; Barnett, Quer. Rel. Fag. Asia: 395. 1940; C.C.Huang, Y.T.Chang & B.M.Bartol. in C.Y.Wu & P.H.Raven, Fl. China 4: 351. 1999. Hickel & A.Camus, Ann. Sci. Nat., Bot. 10.3: 405. 1921; Fl. Indo-Chine 5: 1000. 1930.— Pasania tubulosa Hickel & A.Camus, Ann. Sci. Nat., Bot. 10.3: 405. 1921; Fl. Indo-Chine 5: 1000. 1930. Fig. 93; Plate XXVIII: 1.

Accepted Name : This is currently accepted.

Description : Tree, 10–20 m high, 100–160 cm girth. Terminal buds obovoid, 1–2 by 1–1.5 cm, bracts lanceolate, with silvery hairs. Leaves oblong, 15–25.5 by 5–7.5 cm; base obtuse; apex cuspidate to caudate; margins entire; chartaceous to subcoriaceous; scabrous on the upper surface, greyish pubescent on the lower, then glabrescent; midrib and nerves prominent on the lower surface, more or less depressed on the upper; lateral nerves 14–19 pairs, arched and anastomosing, scalariform veins conspicuous on the lower surface. Petiole stout, 4–5 mm, pubescent, greyish-black when dry. Inflorescences male and female separate or female below, branches, at terminal and axillary, densely pubescent. Male inflorescence: spikelets 5–10 cm long; bracts and bractetoles oblong, 0.5–1.5 by 0.3–0.4 cm, densely pubescent outside. Male flowers whitish to yellowish, always simple or in 1–3-flowered cluster; calyx 6-lobed, broadly campanulate, 1–2 mm long; lobes ovate, divided ca halfway to the base, pubescent outside; stamens 12, 2–3 mm long, glabrous; rudimentary ovary subglobose, ca 1 mm in diam., hirsute. Female inflorescence spike 10–15 cm long. Female flowers solitary, rarely in clusters, other characters as in male flowers. Acorns sessile, ovoid to broadly ovoid, 2–3 by 2.5–3.5 cm (including cupule), depressed at both ends, on erect and slender infructescence, dehiscent. Cupule saucer-shaped, entirely enclosing the nut sometimes dehiscing horizontally; wall comprising alternate pseudo-spines and free scales, pseudo-spines and scales decurved beyond their bases. Nut 1, broadly conical, ca 1.5 by 2 cm, indumentum brown then glabrescent.

Thailand : SOUTH-EASTERN: Trat; PENINSULAR: Nakhon Si Thammarat, Trang.

Distribution : Laos, Vietnam (type).

Ecology : Tropical evergreen rain forests, 50–100 m alt. Flowering: February, April; fruiting: June–December.

Vernacular : Ko chuk (ก่อจุก), ko khon (ก่อขน)(Peninsular); chaeng (แจง)(Southeastern).

Uses: Nuts edible (Laos).