Dehaasia teijsmannii Kosterm.

7. Dehaasia teijsmannii Kosterm. View in CoL — Map 2

Dehaasia teijsmannii Kosterm. (1973) 471. — Type: Teijsmann s.n. (holo BO1273060 ; iso BO1273064 , L0036337 ), [ Indonesia,] Sumatra, Bangka, Sungai Liat .

Trees, twigs terete but angular near the tip, slender, smooth, lenticels conspicuous near the tip, 3–5 mm diam, glabrous but with sparse minute appressed hairs near the tip, terminal leaf buds densely covered with silky hairs. Leaves spirally arranged; lamina membranous, elliptic to sub-obovate, 8–16 by 4–8.5 cm, glabrous on both surfaces, apex obtuse to acuminate, base cuneate, midrib flat to sunken near the base above, raised below, secondary veins 10–12 pairs, curving and joining near margin, sunken to flat above, raised below, tertiary veins reticulate, inconspicuous above, slightly prominent below. Petioles 6–13 mm long, 1–1.5 mm diam, deeply channelled so that the edges almost meet, glabrous or with sparse minute appressed hairs. Inflorescences paniculate-cymose, axillary, 2–4 cm long, few-flowered, rachis with sparse minute appressed light brown hairs. Flowers: tepals unequal, outer tepals ovate, c. 0.7 by 0.8 mm, glabrous but with ciliate margin; inner tepals broadly ovate, 1.3–1.5 by 1.4–1.5 mm, glabrescent, margin ciliate, apex broadly acute; receptacle tubes deep; pedicel slender, c. 7.7 mm long. Stamens 0.8–1.4 mm long; anthers glabrous, truncate at apex; filaments longer than anthers, with dense, 0.1–0.2 mm long brown hairs, filaments of third whorl with two sessile glands each. Staminodes 1(–3?), shortly awl-shaped, c. 0.6 mm long, with dense 0.1–0.2 mm long brown hairs on both sides. Pistil c. 1.7 mm long; ovary ellipsoid, c. 1 by 0.7 mm,

Map 2 Distribution of D. pilosa Fijrid. (●), D. sumatrana Kosterm. (■), D. teijsmannii Kosterm. (▲) and D. tomentosa (Blume) Kosterm. ( *) in Sumatra.

glabrous; style terete, glabrous, shorter than ovary, c. 0.7 mm long; stigma inconspicuous. Fruit not seen.

Distribution — Bangka Island. This species is only known from the type specimen.

Vernacular name — Medang candik.

Note — This species has similar membranous leaves as D. membranacea Kosterm. , which differs in having longer inflorescences and pedicels, heart-shaped and glabrous staminodes, and a caudate leaf apex.