|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: Fabaceae (Leguminosae)||View Description||Dichotomous Key|
|Genus: Trifolium||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Trifolium howellii S. Watson
Habit: Perennial herb, generally robust, glabrous. Stem: erect. Leaf: generally cauline; stipules of mid-leaves 1--2.5 cm, green; leaflets 4--10 cm, elliptic to ovate. Inflorescence: head- or short-raceme-like, 1.5--3 cm; axis generally exserted 2--3 mm; flowers becoming reflexed. Flower: calyx 3.5--4.5 mm, tube 10-veined, lobes slender, +- >= tube; corolla 9--14 mm, green-white to pink. Fruit: stalk-like base +- 1 mm. Seed: 1--3.
Ecology: Wet or shady places, meadows with sedges, alder swamps; Elevation: 800--1800 m. Bioregional Distribution: n KR, n NCoR, n CaR; Distribution Outside California: Oregon. Flowering Time: Jul--Aug
eFlora Treatment Author: Michael A. Vincent & Duane Isely
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory
Previous taxon: Trifolium hirtum
Next taxon: Trifolium hybridum
Citation for this treatment: Michael A. Vincent & Duane Isely 2017. Trifolium howellii, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=47097, accessed on February 24, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 24, 2017.