E-Flora BC: Electronic Atlas of the Flora of British Columbia

Trifolium dubium Sibth.
small hop-clover (suckling clover)
Fabaceae (Pea family)

Introduction to Vascular Plants

© Liz Watkinson  Email the photographer   (Photo ID #22285)

E-Flora BC Static Map
Distribution of Trifolium dubium
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Species Information

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Annual herb from a taproot; stems 1 to several, trailing to decumbent or erect, sparsely hairy, 10-50 cm long.
Alternate, somewhat pinnately compound; leaflets 3, egg- to heart-shaped, 5-15 mm long, shallowly toothed on the upper half, glabrous; stipules egg-shaped, 3-5 mm long, the free tips long-pointed, the margins entire to remotely toothed.
Inflorescence a dense, globe-shaped, short-stalked, axillary head of 3 to 20 drooping, pea-like flowers, the heads 6-8 mm wide and lacking an involucre; corollas yellow turning brown, 3-3.5 mm long, the banner hood-like, folded over the pod, longer than the wings and keel; calyces 1/2 as long as the corollas, glabrous, 5-veined, the teeth lanceolate, the upper pair wider but less than 1/2 as long as the lower three.
Pods, egg-shaped, enclosed by the persistent corolla; seeds 1.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Roadsides, lawns, clearings and waste places in the lowland zone; common in coastal BC; introduced from Europe.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Trifolium dubium

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 122 579 940
Slope Gradient (%) 0 15 40
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
190 299 335
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 3 5
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: CDF(1), IDF(3), PP(1)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is cool temperate & cool mesothermal.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References