生活型

herb

形態特徵

• Perennial herbs, stems 10–30 cm long, aerial branches sparsely pilose or glabrous.
• Leaves sessile, glabrous; emergent leaves 5–6-verticillate, 5–20 mm long, larger ones tripartite, each part repeatedly parted, ultimately segments linear, base semiamplexicaul; submerged leaves 6–8-verticillate, finely divided, 5–25 mm long, segments opposite, filiform to capillary, 0.2–0.4 mm wide.
• Flowers solitary, axillary, sessile or subsessile. Calyx 3.5–5.5 mm long, cleft to below middle, glabrous, bracteoles mostly absent; lobes 2.5–3.5 mm long. Corolla tubular, white at apex, yellow at base, 8–11 mm long, villose on inside lateral surface; lobes ca. 1 mm long, white or light pink.

分布

• 台灣 : in ponds and ditches.

引證標本

TAOYUAN: Lontan, Kao 10743; Paitei, Chuang 4607.

參考文獻

• LIU, Ho-Yih, Flora of Taiwan, second edition 4: 602. 1998.  (Fl. Taiwan 2nd edit.)