生活型

herb

形態特徵

• Annual or biennial herbs, 10–70 cm tall; stems erect, rather stout, glabrous to papillose-pubescent, much branched; branches ascending.
• Basal leaves narrowly lanceolate to elliptic, 5–20cm long, 1–3.5 cm wide, apex acute, base cuneate to obtuse, margins undulate; cauline leaves smaller.
• Inflorescence with verticels of flowers densely arranged in panicles, sometimes with lower whorls remote; inner perianth segments golden yellow; valves ovate-triangular, 2–3 mm long, 1–2 mm wide (excluding teeth), marginal teeth usually 2 on each side, 2–3 mm long, prominently reticulate; callous tubercles present on all 3 valves, subequal, ovoid, 1–1.5 mm long.
• achenes oblong, yellowish-brown, shining.

分布

• 台灣 : seashores, brackish places and waste ground throughout the island.
• 世界 : Native to Eurasia, now worldwidely except extreme northern and southern latitudes.

引證標本

TAIPEI: Mouchi, Kao 237. TAOYUAN: Yangmei, Peng 3098. HSINCHU: Puhsin, Chuang & Kao 4773. TAICHUNG: Salu, Kuoh 10738; Tachia, Kao 9688. PINGTUNG: Kenting, Wang 10037.

參考文獻

• LIU, HO-YIH, Flora of Taiwan, second edition 2: 315. 1996.  (Fl. Taiwan 2nd edit.)