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|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Fabaceae (Leguminosae)||View Description||Dichotomous Key|
|Genus: Trifolium||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Trifolium obtusiflorum Hook.
Habit: Annual, generally robust, glandular-hairy, generally sticky. Stem: erect. Leaf: cauline; stipules deeply cut; leaflets 2--4 cm, +- narrowly elliptic, sharply serrate, longer teeth +- 1 mm. Inflorescence: head-like, 1.5--3 cm wide; involucre cut < 1/2 to base. Flower: calyx 9--11 mm, glandular-hairy or bumpy (occasionally in age glabrous), tube slitting between upper lobes, lobes +- <= tube, generally entire, bristle-tipped; corolla 14--18 mm, pale lavender to dull purple, tips white. Seed: 1--2. Chromosomes: 2n=16.
Ecology: Moist disturbed areas, gravel bars, marshes; Elevation: 30--1800 m. Bioregional Distribution: NW, n&c SN, CW, SCo, SnGb, PR; Distribution Outside California: southwestern Oregon. Flowering Time: Apr--Jul
eFlora Treatment Author: Michael A. Vincent & Duane Isely
Jepson Online Interchange
Previous taxon: Trifolium monanthum subsp. tenerum
Next taxon: Trifolium oliganthum
Citation for this treatment: Michael A. Vincent & Duane Isely 2016. Trifolium obtusiflorum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=47144, accessed on February 14, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 14, 2016.