|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 subterraneum L.
Habit: Annual, hairy. Stem: prostrate or creeping, rooting. Leaf: cauline from ground, alternate or clustered; stipules wide, tapered; petioles > blades; leaflets 10--15 mm, obovate or obcordate. Inflorescence: head-like, +- 1 cm wide, bur-like in fruit; peduncle in fruit curving, growing into ground. Flower: outer 2--8, fertile, calyx tube often with purple band at top, corolla 8--14 mm, generally +- white; inner many, sterile, calyx stalk-like, with 4--5 bristles at tip, elongating, recurving to surround fruits, forming bur, delivered to ground by growing peduncle, corolla 0. Seed: 1. Chromosomes: 2n=16.
Ecology: Meadows, roadsides, disturbed areas; Elevation: < 1000 m. Bioregional Distribution: NCoR, n SN, GV, SCoR, probably elsewhere; Distribution Outside California: sporadic United States; native to southern Europe, northern Africa. Toxicity: TOXIC in excess: estrogen-like compounds may sterilize livestock. Flowering Time: Mar--Apr Note: Fruit of this, related species unique in family in United States.
eFlora Treatment Author: Michael A. Vincent & Duane Isely
Jepson Online Interchange
Previous taxon: Trifolium striatum
Next taxon: Trifolium tomentosum
Citation for this treatment: Michael A. Vincent & Duane Isely 2017. Trifolium subterraneum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=47174, accessed on April 24, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on April 24, 2017.