|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
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|Family: Fabaceae (Leguminosae)||View Description||Dichotomous Key|
|Genus: Trifolium||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Trifolium dubium Sibth.
Habit: Annual, sparsely puberulent. Stem: decumbent to erect. Leaf: 1-pinnate, cauline; stipules ovate; petioles of mid-leaves generally < leaflets; leaflets 0.6--1.2 cm, obovate. Inflorescence: head- to +- spike-like, 0.4--0.8 cm wide, 5--10(20)-flowered; flowers quickly reflexed. Flower: calyx 1.5--2 mm; corolla 3.5--4 mm, bright yellow, in age brown, weak-striate. Fruit: style persistent, < 1 mm. Seed: 1. Chromosomes: 2n=14,16,28.
Ecology: Agricultural, disturbed areas; Elevation: < 500 m. Bioregional Distribution: CA-FP; Distribution Outside California: much of United States; native to Europe. Flowering Time: Apr--Jul
eFlora Treatment Author: Michael A. Vincent & Duane Isely
Jepson Online Interchange
Previous taxon: Trifolium dichotomum
Next taxon: Trifolium eriocephalum subsp. eriocephalum
Citation for this treatment: Michael A. Vincent & Duane Isely 2017. Trifolium dubium, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=47078, accessed on January 18, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on January 18, 2017.