Dehaasia cuneata

Fijridiyanto, I. A., Smets, E. & Arifiani, D., 2020, Taxonomic revision of Dehaasia (Lauraceae) in Sumatra, Blumea 65 (2), pp. 167-175 : 171

3. Dehaasia cuneata (Blume) Blume — Map 1

Dehaasia cuneata (Blume) Blume (1837) 164; Koord. & Valeton (1904) 203; Ridl. (1924) 87; Backer & Bakh.f. (1963) 131; Kosterm. (1964) 467; (1973) 435;Kochummen (1989) 139. — Cryptocarya cuneata Blume (1825) 558. — Haasia cuneata (Blume) Blume in Nees (1836) 378, nom. inval., genus name rejected. — Cyanodaphne cuneata (Blume) Blume (1851) 334. — Type: Blume s.n. (holo L.0036313; iso L.00336315), [ Indonesia,] Java, Nusa Kambangan.

Trees, up to 35 m tall, stem up to 50 cm diam; bark yellowish; sapwood yellow, heartwood darker yellow; twigs whitish, with prominent lenticels and leaf scars, glabrous to sparsely covered with minute appressed light brown hairs, terminal leaf buds densely hairy. Leaves spirally arranged at end of twigs; lamina coriaceous, obovate (or elliptic), (3.5–)7–13(–16.5) by (2.5–)3–6(–7.5) cm, apex rounded or obtuse (rarely short acuminate), base cuneate or obtuse, (oblique), glabrous above, grey with sparse minute appressed light brown hairs below, midrib impressed to flat above, raised to flat below, secondary veins 6 – 9 pairs, curving and joining near margin, slightly raised to flat and glabrous above, raised to flat below, tertiary veins conspicuous, reticulate above, scalariform-reticulate below. Petioles (3–)8–20(–27) mm long, with sparse minute appressed light brown hairs to more densely hairy at the base, flat to channelled but almost terete at the base. Inflorescences subterminal and axillary, paniculate-cymose, up to 14 cm long, with minute appressed light brown hairs. Flowers: tepals unequal, with dense appressed light brown hairs, margin ciliate; outer tepals spreading, c. 0.5 by 0.6 mm; inner tepals broadly ovate, c. 1.3 by 1.4 mm, apex broadly acute; receptacle tubes deep; pedicel c. 2.7 mm long. Stamens 0.8–0.9 mm long, anthers truncate or slightly emarginate at apex; filaments longer than anthers, pubescent, filaments of the third whorl with two sessile glands each. Staminodes narrowly ovoid, thin, c. 0.6 by 0.3 mm, abaxially pubescent and adaxially glabrous. Pistil c. 1.4 mm long; ovary ovoid, glabrous, c. 0.7 by 0.5 mm; style terete, c. 0.7 mm long, glabrous, stigma triangular. Infructescences (2–) 4.5–13.5 cm long. Fruit ellipsoid or oblongoid, 2.3–2.8 by 1.1–1.5 cm, with a sour taste and strong smell; stalk distinctly swollen, 1–1.7 cm long, fleshy, warty, red when fresh.

Distribution — Malay Peninsula, Sumatra (West coast, Bengkulu, Palembang and Bangka Island), Java, Borneo.

Habitat & Ecology — Rather common, scattered, on sandy soil, primary forest, at 5–700 m altitude. Flowering: February to June; fruiting: March to September.

Vernacular names — Medang puti,medang tanahan,medang tanduk.

Note — This species is quite similar to D. tomentosa . The latter has a shallow receptacle, subequal tepals, thick staminodes, midrib on the upper leaf surface with sparse light brown hairs.