生活型

tree

形態特徵

• Small evergreen trees; twigs gray-brown, terete, young twigs thick, brown, minutely sparsely pilose or glabrous; terminal buds narrowly ovoid, rusty tomentose or appressed hairy, 6–8 mm long, apex acuminate, often slightly curved.
• Leaves coriaceous, glabrescent, elliptic to ovate, 7–15 cm long, 3.5–7 cm wide, apex acuminate to caudate, base cuneate or acute, margins slightly recurved, glandular-dentate to crenulate with teeth, teeth 2–4 mm apart, midrib impressed on upper surface, distinctly prominent on lower surface, nerves 6–10 pairs, prominent on lower surface, petiole minutely sparsely pilose or glabrescent, 10–20 mm long.
• Inflorescences axillary, a spikes, usually branched at base, 3–12 cm long, axis brownish tomentose, bracts ovate, 2.5–3.5 mm long, apex acute, bracteoles 2, ovate to depressed ovate, ca. 2 mm long, apex acute, both persistent, keeled, adaxially glabrous, abaxially with same indumentum as on Inflorescence axis. Calyx tube glabrous, 0.5–1 mm high, limb ca. 2 mm long, lobes imbricate, ovate, ca. 2 mm long, apex obtuse, adaxially glabrous, abaxially appressed pubescent, margin ciliate; corolla white, 4–6 mm long, deeply 5-lobed, tube 1–1.5 mm long, lobes elliptic; stamens 40–60; disc glabrous, annular to shortly cylindrical; style glabrous, ca. 5 mm long, ovary 3-locular.
• Fruits ovoid to narrowly ampulliform, with persistent calyx lobes forming a conical beak, 7–8 mm long including the beak, 5–6 mm wide, stone ampulliform, shallowly grooved, seed 1, twice curved with similarly curved embryo.

分布

• 台灣 : only in Lanyu and Lutao islands.
• 世界 : the Philippines.

引證標本

TAITUNG: Lanyu, Kawakami & Sasaki 34 (Type of S. kotoensis), Chang 10304, 16438; Tienchih, Lanyu, Huang et al. 9380, Tateishi et al. 15225; Lutao, Kawakami & Kobayashi 4845.

引用文獻

• NAGAMASU, Hidetoshi, Flora of Taiwan, second edition 4: 108. 1998.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)