|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Rosaceae||View Description||Dichotomous Key|
|Genus: Potentilla||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Potentilla biennis Greene
Habit: Annual or biennial, taprooted, glandular. Stem: ascending to erect, 10--70 cm, +- spreading-hairy. Leaf: ternate; basal often withered in flower; cauline generally 2--10 cm, leaflets 3, central 5--30 mm, +- obovate, singly and doubly 7--13(19)-toothed +- 1/4 to midvein, +- hairy. Inflorescence: few- to many-flowered. Flower: hypanthium 2--4 mm wide; petals 1--2.5 mm, < sepal, oblanceolate-elliptic; stamens 10(15), filaments 0.5--1 mm, anthers +- 0.2 mm; style +- 0.7 mm, tapered from rough-thickened base. Fruit: +- 0.6 mm, smooth, +- white.
Ecology: Moist shores; Elevation: 1500--3100 m. Bioregional Distribution: SNH, TR, GB, DMtns; Distribution Outside California: western North America. Flowering Time: May--Oct
eFlora Treatment Author: Barbara Ertter
Jepson Online Interchange
Previous taxon: Potentilla basaltica
Next taxon: Potentilla breweri
Citation for this treatment: Barbara Ertter 2017. Potentilla biennis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=39681, accessed on February 22, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 22, 2017.