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Annual, perennial herb, carnivorous, of moist or aquatic habitats. Stem: caudex or stolon, then often with thread-like branches. Leaf: simple, in rosette, or simple or dissected, emerging from caudex or stolon, with minute, carnivorous bladders ± throughout. Inflorescence: raceme or 1-flowered, scapose. Flower: bisexual; calyx lips 2, upper 3-lobed, lower 2-lobed, or lips unlobed; corolla 2-lipped, spurred at base, lower lip flat or arched upward, blocking throat or not; stamens 2, epipetalous; ovary superior, chamber 1, placenta generally free-central; stigma unequally 2-lobed, ± sessile. Fruit: capsule, round, 2-valved, circumscissile, or irregularly dehiscent. Seed: generally many, small.
3 genera, 330 species: worldwide, especially tropics. [Rice 2006 Growing Carnivorous Plants. Timber Press] —Scientific Editor: Thomas J. Rosatti.
Key to Lentibulariaceae
Carnivorous by bladders (here treated as modified leaves), into which small organisms are sucked when hairs at opening are triggered [epiphytic]. Stem: submersed or subterranean shoots [rarely caudex]; some aquatic species produce 2 kinds of stems, green (in water or at surface; leaves with flattened or thread-like segments; bladders 0–few) and white (generally buried in substrate; leaves 0; bladders many), the latter not always present in poor collections. Leaf: simple or generally dissected into narrow segments, alternate on stolon, margins often with bristles (visible at 10–30×). Inflorescence: raceme or 1-flowered, emergent; scape slender or wiry, bracts present. Flower: calyx lips 2, unlobed; corolla yellow [or not], with red-brown streaks or not, upper lip ± entire, lower entire or 3-lobed, spurred; rarely cleistogamous. Fruit: capsule.Key to Utricularia
± 220 species: worldwide, especially tropics, Australia. (Latin: little bag, from bladders) [Taylor 1989 Kew Bull Add Ser 14:1–724] Size variable, often unreliable for identification; distinction between stems, leaves uncertain. Glands inside bladders consist of 2 pairs of oppositely directed arms, angles of divergence between which used (at 150× or more) to identify fresh or pressed specimens.
Loosely rooted (rarely free-floating) aquatic or creeping in mud. Stem: generally of 1 kind, thread-like, with leaves, few bladders throughout; winter buds 0. Leaf: 2–15 mm, generally 2-parted at base, each part forked again or not, bladders 0(2); ultimate segments 2–6 (8), thread-like. Inflorescence: 1–4-flowered; peduncle < 20 cm, < 0.8 mm diam; pedicel erect in fruit. Flower: corolla 6–15(25) mm, lower lip <= upper, spur ± = lower lip, conic. Fruit: laterally 2-valved. Seed: winged.
2n=28. Shallow water, mud, mat-forming at surface of deep waters or not; 10–2300 m. n&c California Floristic Province. Plants in North Coast, Great Central Valley possibly are not native there, and may have been spread there by horticulturists or agriculture. Jul–Sep [Online Interchange]
Previous taxon: Utricularia
Next taxon: Utricularia intermedia
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jan 31 2015
Citation for this treatment: [Author of taxon treatment] 2013. Utricularia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=47599, accessed on Jan 31 2015
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© 2004 Barry Rice
|Geographic subdivisions indicated for the distribution of Utricularia gibba|| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
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