20. Utricularia gibba Linnaeus, Sp. Pl. 1: 18. 1753.
少花狸藻 shao hua li zao
Utricularia diantha Roxburgh ex Roemer & Schultes; U. exoleta R. Brown; U. gibba subsp. exoleta (R. Brown) P. Taylor; U. khasiana J. Joseph & Mani; U. nagurae Makino; U. pterosperma Edgeworth; Vesiculina gibba (Linnaeus) Rafinesque.
Annuals or perennials, affixed or suspended aquatic. Rhizoids absent or present, filiform, branched. Stolons filiform, much branched, often mat-forming. Traps lateral on leaf segments, stalked, ovoid, 1-2.5 mm, mouth lateral; appendages 2, dorsal, branched, setiform, with shorter setae. Leaves numerous on stolons, 0.5-1.5 cm; primary segments (1 or)2, unbranched or sparsely dichotomously branched into 3-8 ultimate segments; ultimate segments capillary, slightly flattened, margin entire or sparsely denticulate, apex and teeth setulose. Inflorescences erect, 2-15 cm, 1-3(-6)-flowered; peduncle terete, 0.3-0.5 mm thick, glabrous; scale 1, similar to bracts; bracts basifixed, semiorbicular, ca. 1 mm, minutely glandular, apex truncate and obscurely dentate. Pedicel erect to spreading, 2-12 mm, filiform; bracteoles absent. Calyx lobes subequal, broadly ovate to orbicular, 1.5-2 mm, apex rounded. Corolla yellow, 4-8 mm; lower lip slightly smaller than upper lip, base with a prominent 2-lobed swelling, apex rounded; spur narrowly conic to cylindric from a conic base, shorter or longer than corolla lower lip, distal part sparsely stipitate glandular, apex obtuse; palate densely pubescent; upper lip broadly ovate to suborbicular, ca. 2 × as long as upper calyx lobe, apex obscurely 3-lobed. Filaments 1-1.5 mm, curved; anther thecae confluent. Ovary globose; style evident; stigma lower lip transversely elliptic, upper lip obsolete. Capsule globose, 2-3 mm in diam., 2-valvate. Seeds lenticular, 0.8-1 mm in diam., margin broadly winged, wing shallowly and irregularly dentate; seed coat with small prominent reticulations. Fl. Apr-Nov, fr. May-Dec. 2n = 28.
Shallow still or slowly flowing water, pools, lakes, bogs, swamps, marshes, rice fields; near sea level to 900 m. Anhui, Chongqing, Fujian, Guangdong, Guangxi, Hainan, S Henan, Hubei, Hunan, Jiangsu, Taiwan, Yunnan, Zhejiang [India, Indonesia, Japan, Malaysia, Myanmar, Nepal, Papua New Guinea, Philippines, Sri Lanka, Thailand, Vietnam; Africa, tropical America, SW Asia, Europe, Indian Ocean islands (Mauritius), Madagascar, North and South America, Pacific islands (New Caledonia, Palau)].