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    台灣植物誌 第二版  Flora of Taiwan, 2nd edition    Vol. 4

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    台灣植物誌第二版  Flora of Taiwan, 2nd edition  4: 718

    136. LENTIBULARIACEAE WĦ

    LI, Zhen-Yu


    Perennial or annual insectivorous herbs, terrestrial, epiphytic or aquatic. Roots present or absent. Stems usually modified to rhizoids, stolons or rhizomes, rarely developed. Leaves alternate or in basal rosette, simple or 1-many times divided, exstipulate. Traps (bladders) on rhizoids, stolons or leaves, or absent (Pinguicula). Inflorescences usually racemes, or flowers solitary; peduncle erect or twining. Flowers perfect, zygomorphic. Calyx 2-4 divided, or 5(-9)-lobed, lobes imbricate, persistent. Corolla gamopetalous, with short tube, limb 2-lipped; upper lip entire or 2-3- lobed; lower lip entire or 2-3(-6)-lobed, lobes imbricate; spur subulate, cylindrical, conical or saccate. Stamens 2, inserted at base of lower of corolla, included; filaments short, linear, curved or straight; anthers dorsifixed, ellipsoid, thecae 2, divaricate, confluent, rarely not confluent; staminodes absent. Disc wanting. Gynoecium of 2 united carpels; ovary superior, globose, ovoid or ellipsoid, 1-locular, placenta free-central or basal; ovules 2-numerous, anatropous, somewhat sunken into placenta; style 1, or wanting; stigma 2-lipped, upper lip + reduced. Fruit usually capsular, loculicidally or circumscissilely dehiscent, rarely indehiscent. Seeds (1-) few to numerous, minute, variously shaped and sculptured, without endosperm.

    Three genera and about 240 species. Cosmopolitan but mostly in tropical regions; one genus in Taiwan.

    LITERATURE

    Hsiao, J. Y. 1978. Lentibulariaceae. In H. L. Li. Et al. (eds.) Fl. Taiwan 4: 693-698.
    Komiya, S. 1972. Systematic studies on the Lentibulariaceae. Ph. D. Dissertation, Nippon Dental College, Tokyo.
    Kuo, F. T. 1968. Utricularia in Taiwan. Biol. Bull. Taiwan Normal Univ. 3: 27-42. 1968.
    Li, Z. Y. 1988. A revision of the genus Utricularia in China. Bull. Bot. Res. 8: 25-39.
    Taylor, P. 1989. The genus Utricularia-a taxonomic monograph. Kew Bull. Add. Ser. 14: 1-724.


    1. UTRICULARIA L. WĦ

    Perennial or annual herbs, terrestrial, epiphytic or aquatic, without true roots. Stems modified to rhizoids and stolons, rarely developed. Leaves alternate or in basal rosette, simple or 1-many times divided; nerves 1-3, unbranched, dichotomously branched, or pinnate. Traps small bladder-like, on rhizoids, stolons or leaves. Inflorescences racemose, or flowers solitary, peduncled, usually simple, seldom branched, erect or twining, bracteate; scales (sterile bracts) and bracteoles often present. Calyx divided from base into 2 (4) equal or unequal lobes. Corolla yellow, violet, purple, blue, mauve, red or white, bilabiate; upper lip entire or 2 or 3-lobed; lower lip larger, entire or 2- or 3(-6)-lobed, with a variously raised palate in throat. Capsule globose, ovoid or ellipsoid, or dorsiventrally compressed, loculicidally dehiscing only on adaxial side, or on both abaxial and adaxial sides, or circumscissile, rarely indehiscent. Seeds (1-) few to many, globose, ovoid, obovoid, ellipsoid, fusiform, cylindrical, lenticular or prismatic, with various prominences or appendages.

    About 200 species, cosmopolitan but mostly in the tropics, a few in the north temperate zone; seven species in Taiwan.

    KEY TO SPECIES