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Sour Clover
Trifolium fucatum
About Sour Clover (Trifolium fucatum) 5 Nurseries Carry This Plant Trifolium fucatum is a species of clover known by the common names bull clover and sour clover. It is native to California and Oregon, where it grows in many types of habitat, becoming common to abundant in some areas. Trifolium fucatum is an annual herb growing decumbent to erect in form, the stem often thick-walled and hollow. The leaf blades are made up of oval or rounded leaflets with smooth or toothed edges, and the leaves have large stipules. The inflorescence is a head of flowers with a base of wide bracts. Each flower corolla is 1 to 2 centimeters long and white or yellowish with purple tips. The flower becomes inflated as the fruit develops.
Plant Description
Plant Type
Plant Type
Annual herb

Wildlife Supported

Butterflies & moths hosted ( 62 likely * ) SHOW ALL

Landscaping Information
Full Sun



Common uses
Common uses
Bee Gardens

Sunset Zones
Sunset Zones?
5*, 6*, 7*, 8*, 9*, 14*, 15*, 16*, 17*, 18*, 19*, 20*, 21*, 22*, 23*, 24*

Natural Setting
Site Type
Site Type
Disturbed places

Annual Precipitation: 8.8" - 75.0", Summer Precipitation: 0.14" - 1.59", Coldest Month: 33.5" - 56.2", Hottest Month: 58.8" - 79.3", Humidity: 0.14" - 26.55", Elevation: -3" - 5358"

Alternative Names
Common Names: Bull Clover

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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