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|Family: Rosaceae||View Description||Dichotomous Key|
|Genus: Comarum||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Comarum palustre L.
Habit: Perennial herb, nonglandular, openly matted. Stem: non-flowering portion creeping, often floating and/or rooting at nodes; flower-stem erect to ascending, 20--50 cm, +- glabrous to +- strigose. Leaf: alternate, odd-1-pinnate to subpalmate, 5--20 cm; leaflets 2--3 per side, toothed, terminal generally +- = lateral, 15--70 mm, oblanceolate-elliptic, distal 1/3 toothed +- 1/4 to midvein, +- glabrous to sparsely strigose. Inflorescence: cyme, +- open, generally < 10-flowered; pedicels straight. Flower: hypanthium +- shallow, 5--10 mm wide; bractlets 5; sepals +- triangular; petals << sepals, 2--6 mm, +- ovate to elliptic, dark red; stamens 20--25, filaments 1.5--2.5 mm, anthers 1--1.5 mm, pollen sac 1, horseshoe-shaped; pistils many, ovaries superior, styles 0.8--2 mm, slender, jointed laterally to fruit. Fruit: achene, 1--1.5 mm, glabrous, glossy, +- brown, sometimes remaining attached to spongy receptacle. Chromosomes: 2n=28,42--64.
Ecology: Bogs, marshes; Elevation: < 2400 m. Bioregional Distribution: NCo, CaRH, n SNH, ScV, Wrn; Distribution Outside California: circumboreal. Flowering Time: May--Aug
Synonyms: Potentilla palustris (L.) Scop.
eFlora Treatment Author: Barbara Ertter
Jepson Online Interchange
Previous taxon: Comarum
Next taxon: Cotoneaster
Citation for this treatment: Barbara Ertter 2017. Comarum palustre, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=20069, accessed on January 19, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on January 19, 2017.