生活型

herb

形態特徵

• Herb; ascending to erect, sparsely puberulent when young; stipules free, triangular, 0.3-0.5 mm long, incised, glabrous.
• Leaves green, linear to linear-oblong, 20–60 mm long, 2–7 mm wide, acute to obtuse at apex, obliquely rounded at base, serrulate at margin, subglabrous above, puberulent-sericeous below, petioles 1.5–2.5 mm long, puberulent-sericeous abaxially.
• Cyathia in densely pedunculate cymes together with a solitary cythium at nodes; involucres turbinate to campanulate, 0.5–1 mm long, glabrous or nearly so outside, pilose inside; stalks 0.5–2.3 mm long; glands 4, rounded to transversely elliptic, 0.1-0.3 mm long; appendages white to reddish, reniform to orbicular, entire to subundulate, 0.2-0.8 mm long, 0.1-0.6 mm wide; bracteoles linear to linear-oblanceolate, lacerate-laciniate at margin. Male flowers 5–20, anthers red. Female flowers with glabrous pedicel and ovary; style and stigma 0.2-0.4 mm long.
• Capsules 1.5–2 mm long, 1.9–2 mm diam., exserted, nutant, glabrous, the pedicels to 3 mm long; seeds brackish, tetragonal, elliptic-ovoid, 1.1–1.3 mm long, 0.8–1 mm diam, transversely rugose.

分布

• 台灣 : It is frequently associated with farm crops and weeds in Taiwan.
• 世界 : Southern China, Malaysia, from the Philippines to Polynesia, Australia, the Ryukyus and Japan.

引證標本

TAIPEI: Fanshuliao, Mori 3881. MIAOLI: Tsaochiao, Shimada 3152C. NANTOU: Tanan, Hayata s. n. 1916. CHANGHUA: Hsihu, Sakida s. n. 1936; Peitou, Shimada s. n. 1909; Hsichou, Takeoito s. n. 1922; Houliao, Hsu 4736. YUNLIN: Iwu, Yang 3774. CHIAYI: Chiayi City, Kao 7893. TAINAN: Chiali, Morimoto 106. KAOHSIUNG: Chishan, Suzuki 6754. PINGTUNG: Hsiaoliuchiu, Hosokawa 1943. TAITUNG: Peinan, Kobayashi 1594. HUALIEN: Fenglin, Lu 8501

參考文獻

• HUANG, TSENG-CHIENG, Flora of Taiwan, second edition 3: 451. .  (Fl. Taiwan 2nd edit.)