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Farnsworth's Jewel Flower
Streptanthus farnsworthianus
About Farnsworth's Jewel Flower (Streptanthus farnsworthianus) 1 Nurseries Carry This Plant Streptanthus farnsworthianus is an uncommon species of flowering plant in the mustard family known by the common name Farnsworth's jewelflower. It is endemic to California, where it is limited to the woodlands of the Sierra Nevada foothills. It is an annual herb producing a hairless, waxy, purple or purple-tinged stem up to half a meter tall or more. The ephemeral basal leaves have blades up to 15 centimeters long which are each divided into several narrow lobes or leaflets. Leaves higher on the stem have purple lance-shaped blades that generally clasp the stem at their bases. Flowers occur at intervals along the upper stem with one or two leaflike purple bracts at the base of the raceme. Each flower has an urn-shaped calyx of purple sepals up to a centimeter long. Curling purple-veined white petals emerge from the tip of the calyx. The fruit is a straight or curving silique up to 12 centimeters long. The plant was named for Evalyn Lucille Klein Farnsworth, a foothills cattle rancher and plant collector who first discovered it growing on her land.
Plant Description
Plant Type
Plant Type
Annual herb

1.6 ft tall

Flower Color
Flower Color
White, Purple

Wildlife Supported

Butterflies & moths hosted ( 7 likely * ) SHOW ALL

Landscaping Information
Full Sun, Part Shade


Natural Setting
Annual Precipitation: 8.8" - 38.6", Summer Precipitation: 0.20" - 1.06", Coldest Month: 39.0" - 50.3", Hottest Month: 61.6" - 77.4", Humidity: 2.25" - 25.86", Elevation: 441" - 5893"

Alternative Names
Common Names: Farnsworth's Jewel-flower, Farnsworth's Jewelflower

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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