生活型

herb

形態特徵

• Annual, terrestrial herbs. Rhoizoids and stolons capillary, branched.
• Leaves few to numerous, at stolon nodes, 25–45 mm long, 1.5–6 mm wide, glabrous; lamina linear to narrowly obovate, membranaceous, 3-nerved, base attenuate, margins entire, apex rounded to acute. Traps on rhizoids, stolons and leaves, globose, 1–1.5 mm long, stalked; mouth basal, with 2 subulate, stipitate-glandular appendages.
• Inflorescences erect, 3–12 cm long, 1–10-flowered, glabrous; peduncle slightly angular, 0.2–0.5 mm thick; scales few, similar to bracts; bracts basifixed, narrowly ovate, apex acute, 0.8–1 mm long; bracteoles narrowly linear or subulate, apex acute, slightly shorter than bract; pedicels suberect, filiform, narrowly winged, 1–1.5 mm long at anthesis, to 5 mm in fruit. Calyx lobes subequal, broadly ovate or subcircular, 2.5–5 mm long, margin minutely denticulate; upper lobe obtuse or subacute; lower lobe slightly smaller, emarginate. Corolla lilac, violet or white, 3–7 mm long; upper lip oblong, apex rounded or emarginate, scarcely longer than upper calyx lobe; lower lip subcircular, base greatly swollen, apex rounded or emarginate; palate with a ciliate marginal rim; spur subulate, apex acute, about as long as and widely diverging from lower lip. Filaments straight, ca. 1 mm long; anther thecae distinct. Ovary ovoid, dorsiventrally compressed; style short but distinct; lower lip of stigma semicircular, upper lip obsolete.
• Capsule ovoid, dorsiventrally compressed, 2–4 mm long, dehiscing by dorsal and ventral longitudinal slits. Seeds subglobose, 0.3–0.4 mm in diam.; testa with reticulate prominences, reticulations isodiametric.

物候

Flowering June to September, fruiting July to October.

分布

• 台灣 : in swamps, streamsides and rice fields at low elevations.
• 世界 : Tropical Asia to southern Japan and Korea, and to Australia.

引證標本

TAOYUAN: Chugli, Sasaki s. n. 1928; Tachutsuen, Kuo s. n. 1967.

參考文獻

• LI, Zhen-Yu, Flora of Taiwan, second edition 4: 729. 1998.  (Fl. Taiwan 2nd edit.)