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|Family: Lentibulariaceae||View Description||Dichotomous Key|
|Genus: Utricularia||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Utricularia macrorhiza Leconte
Habit: Floating aquatic. Stem: well defined, weakly branched central stolon with leaves, bladders; winter buds 1--2 cm, bristly. Leaf: 15--90 mm, 1--2-parted at base, each part unequally pinnately dissected above; ultimate segments dense, 30--150, thread-like, margin bristles 0.1--0.3 mm; bladders near base larger than those near tip. Inflorescence: 5--20-flowered; peduncle 1--4 dm, stout, 1--3 mm diam; pedicel recurved in fruit. Flower: corolla 1--2 cm; lower lip > upper; cylindric spur +- hooked upward near tip. Fruit: circumscissile. Seed: 4--6-sided, -winged. Chromosomes: 2n=+-40.
Ecology: Quiet, shallow or deep, rarely flowing, acidic waters; Elevation: < 2700 m. Bioregional Distribution: NW, CaR, SN, SnFrB, SnBr, GB, w DMoj; Distribution Outside California: North America except extreme southeastern, northeastern Mexico, eastern Asia. Flowering Time: Jun--Sep Note: Utricularia vulgaris L. excluded by recircumscription.
Synonyms: Utricularia vulgaris L. var. americana A. Gray; Utricularia vulgaris subsp. macrorhiza (Leconte) R.T. Clausen
Unabridged Note: Plants with floating, inflated, radiating branches at peduncle base, deeply 3-lobed lower corolla lip belong to Utricularia inflata Walter, native to and of special concern in eastern United States, troublesome weed in Washington, presently known only from pond in zoo near Fresno but in future expected in wildlands in California.
eFlora Treatment Author: Barry A. Rice
Jepson Online Interchange
Previous taxon: Utricularia intermedia
Next taxon: Utricularia minor
Citation for this treatment: Barry A. Rice 2017. Utricularia macrorhiza, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=47607, accessed on January 22, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on January 22, 2017.