Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



Lawrence R. Heckard

Annual, perennial herb, carnivorous, of moist or aquatic habitats
Stem a caudex (Pinguicula ) or filamentous with alternate or whorled branch systems in place of leaves (Utricularia )
Leaves 0 or in basal rosette, simple
Inflorescence: raceme, spike, 1-flowered or scapose
Flower bisexual; calyx 2-lipped, generally 4–5-lobed; corolla 2-lipped, 5-lobed, spurred at base, lower lip arched and generally pouched upward, blocking throat; fertile stamens 2, epipetalous; ovary superior, chamber 1, placenta generally free-central; stigma unequally 2-lobed, ± sessile
Fruit: capsule, round, generally 2-valved (sometimes irregularly dehiscent)
Seeds generally many, small
Genera in family: 4 genera, 200 species: worldwide, especially tropical.



Annual, perennial herb, generally aquatic
Stem submersed or creeping, uncoiling at tip, sometimes with claw-like appendages, with generally alternate green branch systems ("leaves") of ± linear or thread-like segments; bladders borne on stem or "leaves" trap small organisms when entrance hairs triggered; terminal, overwintering buds dispersed in some species
Leaves: true leaves 0
Inflorescence: raceme (rarely 1-flowered), bracted, emergent
Flower: calyx lips entire; corolla generally yellow, lower lip entire or 3-lobed, generally blocking throat, hairy, red-spotted, upper lip ± entire
Fruit generally circumscissile (or opening irregularly)
Species in genus: ± 180 species: worldwide, especially. tropical
Etymology: (Latin: little bag, from bladders)
Reference: [Ceska & Bell 1973 Madroño 22: 74–84]
Horticultural information: Pure water ponds; DFCLT.


U. gibba L.

Stems floating or creeping; winter buds 0; "leaves" 2–15 mm, generally 2-parted at base, each part forked again or not; ultimate segments < 6, thread-like; bladders on stem and leaves
Inflorescence 1–4-flowered; peduncle < 15 cm, < 1 mm wide; pedicel erect in fruit
Flower: corolla 6–8 mm, lips subequal, = conic spur
Seed winged
Chromosomes: 2n=28
Ecology: Uncommon. Shallow water, mud
Elevation: < 1600 m.
Bioregional distribution: n&c California Floristic Province
Distribution outside California: to British Columbia, e N.America, tropical
Synonyms: U. fibrosa Walter; U. biflora Lam
Highly variable; sometimes cultivated, may be invasive; probably alien in CA.

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