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FOC | Family List | FOC Vol. 19 | Lentibulariaceae | Utricularia

18. Utricularia limosa R. Brown, Prodr. 432. 1810.

长梗狸藻 chang geng li zao

Nelipus limosa (R. Brown) Rafinesque; Utricularia verticillata Benjamin.

Perennials or annuals, subaquatic or terrestrial. Rhizoids and stolons capillary, branched. Traps on stolons and leaves, long stalked, obliquely ovoid, 0.5-1 mm, covered externally with clavate glands, mouth lateral; appendages 2, dorsal, branched, setiform. Leaves numerous, from peduncle base and stolon nodes, long petiolate, to 5 cm including petiole; leaf blade narrowly oblong in outline, pinnately divided; segments alternate, capillary, terete, glabrous. Inflorescences erect, 5-25 cm, 2-10-flowered; peduncle terete, 0.5-0.8 mm thick; scales few, similar to bracts; bracts basisolute, elliptic, 1.5-2 mm, base obliquely truncate, margin erosely denticulate, apex acute. Pedicel ascending, 2-6 mm, filiform, slightly dorsiventrally flattened, minutely papillose; bracteoles absent. Calyx lower lobe obovate-oblong, 1.3-2 mm, apex rounded; upper lobe transversely elliptic, 1.1-1.5 mm, apex rounded. Corolla violet, with a yellow spot at base of lower lip, 4.5-6 mm; lower lip subquadrate, longer than upper lip, 2-lobed to ca. 1/2 its length, lobes ovate-oblong; spur narrowly cylindric from a conic base, somewhat longer than corolla lower lip, apex obtuse; palate with a slightly raised, rounded marginal rim; upper lip broadly ovate, ca. 2 × as long as upper calyx lobe, apex rounded. Filaments ca. 0.6 mm, strongly curved; anther thecae confluent. Ovary globose; style short; stigma lower lip semicircular and margin papillose, upper lip obsolete. Capsule globose, 2-3 mm, dehiscing by an ovate-oblong ventral pore. Seeds globose, 0.2-0.3 mm in diam.; seed coat with prominent nearly isodiametric coarse reticulations. Fl. Aug-Sep, fr. Sep-Oct.

Swamps, rice fields, wet grasslands; near sea level. S Guangdong, S Guangxi, Hainan [Indonesia (Papua Barat), Laos, Malaysia (peninsular), Thailand, Vietnam; N Australia].


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