Utricularia

Scientific name

Utricularia L.

Common names

bladderwortbladderwort:
(n) any plant of the genus <em>Utricularia</em>

Family

Lentibulariaceae

Similar genera

Aldrovanda, Riccia

Native distribution

cosmopolitancosmopolitan:
(adj) essentially worldwide in distribution

Species cultivated

Utricularia aurea Lour.

U. australis R. Br.

U. gibba L.

U. graminifolia Vahl

U. inflexa Forssk.U. radiata Small

U. reflexa Oliv.

U. stellaris L.f.

Adventive distribution

Utricularia geminiscapa is introduced into New Zealand, but restricted to Westland.

U. gibba is introduced into Europe, Hawaii (United States) and New Zealand.

U. stygia is introduced into North America.

Weed status

Utricularia inflata is a considered an aquatic weed in one country.

Habit

free-floating below water surface, rootless, submersedsubmersed:
see submerged
or amphibiousamphibious:
(adj) of a plant able to live on land or in water
stem plant

Brief description

Perennial perennial:
(adj) (of a plant) having a life cycle of more than two years
or annual. Submersedsubmersed:
see submerged
, free-floating or fixed by root-like rhizoids, often tangled with other plants in aquatic species. Leaves and stem poorly differentiated and morphology highly variable, arrangment of such 'leaves' alternatealternate:
(adj) (of leaves) bearing one leaf per node; placed singly on the stem at different heights
or whorledwhorled:
(n) bearing whorls; a type of leaf arrangement (phyllotaxis) in which leaves are in whorls
, dimorphic: emergentemergent:
(adj) (syn. emersed) with parts raised out of the water; extending up out of the water
leaves peltatepeltate:
(adj) of usually flat organs such as leaves: having its stalk attached to its underside away from the margin, near the center
, entireentire:
(adj) having a continuous margin that is not toothed or lobed
, linear, obovateobovate:
(adj) ovate, with the narrow end at the base
, spathulatespathulate:
(adj) (or spatulate) spoon-shaped
or reniformreniform:
(adj) kidney-shaped
; submersedsubmersed:
see submerged
leaves usually highly dissecteddissected:
(adj) (of leaves) +/- deeply divided, cut, or lobed, including being compound
, with globoseglobose:
(adj) spherical or nearly so
, bladder-like traps. Inflorescenceinflorescence:
(n) the arrangement of flowers on the floral axis
a racemeraceme:
(n) an indeterminate, unbranched inflorescence having pedicelled flowers on a usually elongated axis (may be cymose)
, often supported on a whorlwhorl:
(n) three or more similar organs arranged in a circle at the same point around an axis
of inflatedinflated:
(adj) bladdery; swollen, or appearing so
leaves or floats. Flowers showy, distinctive, zygomorphiczygomorphic:
(adj) bilaterally symmetrical; symmetrical along only one plane
; sepals 2; petals 5, fused at base, corollacorolla:
(n) the inner whorl(s) of the perianth; all the petals of a flower
2-lipped. Dispersal by stem fragments or seeds.

Natural habitat

variable; terrestrialterrestrial:
(adj) growing on land as opposed to living in water
species in waterlogged or wet soils, aquatic species in ponds and other still, muddy-bottomed waters; a few species adapted to rapidly moving streams

Additional comments

A large polymorphicpolymorphic:
(adj) displaying multiple forms (of, e.g., an organ) in one organism
genus of over 200 species, most of which are terrestrialterrestrial:
(adj) growing on land as opposed to living in water
or subterranean; about 30 species are aquatic. Foliage of Utricularia appears as a tangled mass with roots, turions, stems and leaves and leaflets highly variable and poorly differentiated; leaves may not be easily recognizable as such, or stems may look like leaves, and vice versa. The main consistent feature of the genus is the inflorence, which is frequently highly ornate.