生活型

herb

形態特徵

• Herbs perennial, 3-10 cm high, much-branched, with herbaceous stems from a short woody basal stem. Roots fleshy. Stems not articulated, diffuse, branched basally, 1-2 mm thick; leaf axils more or less villous.
• Leaves alternate, subsessile; leaf blade to 2.5 mm thick, fleshy, oblong to obovate-oblong, 3-10 mm long, base obtuse, apex obtuse or rounded.
• Flowers solitary, about 1-1.6 cm in diameter, surrounded by involucre of 4-6 bracts. Sepals ovate-deltate, ca. 2.5 mm, veined. Petals 5, yellow or yellowish, elliptic, 2.5-3.0 mm long. Stamens 10-30. Ovary ovoid. Stigma 2-5-lobed.
• Capsule glossy straw colored apically, broadly ovate, compressed, 2.5-4.5 mm long, 2.5-3.5 mm wide. Seeds black, turning iridescent gray when fully mature, orbicular-reniform, ca. 0.7 mm; testa cells interlocking, slightly raised.

物候

Flowering and fruiting observed throughout the year in Tungshatao, and mainly in summer to autumn in Taiwan.

分布

• 台灣 : On coral sands or coral reefs, occasionally in crevices of artificial cement structure at coastal region.
• 世界 : North Philippine (Batan Is.), South China (Hainan), Tungshatao, South Taiwan (Kenting, Liuciou, Lutao, Lanyu and the Penghu Islets), and the Ryukyus (Ikei Islet).

引證標本

KAOHSIUNG: Tungshatao, C. L. Lin 40 (TAIF), T. C. Hsu 707 (TAIF), T. C. Huang et al. 16533 (TAI), T. Kawakamii 4621, 4658 (TAIF). PINGTUNG: Kengting, C. C. Hsu & R. Hsu 4210 (TAI), T. Hosokawa 1628 (holotype of Portulaca insularis Hosokawa, TAI), T. Hosokawa 1629 (TAI), P. F. Lu 13858 (HAST). TAITUNG: Lutao, T. I. Chuang & C. C. Hsu 2283 (TAI); Lanyu, P. F. Lu 12700 (HAST). PENGHU: Penghu Islet, T. C. Huang & M. T. Kao 6807 (TAI), Shiyui, C. C. Hsu & C. S. Kuoh 14043 (TAI); Shiyu Islet, K. S. Hsu s. n. (TAIF).

參考文獻

• Shih-Wen Chung, Domingo A. Madulid and Tien-Chuan Hsu, Taiwania 53(1): 90-95. 2008.