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Morrison's Jewelflower
Streptanthus morrisonii
About Morrison's Jewelflower (Streptanthus morrisonii) 0 Nurseries Carry This Plant Streptanthus morrisonii is an uncommon species of flowering plant in the mustard family known by the common name Morrison's jewelflower. It is endemic to California, where it is known from the North and Central Coast Ranges. It is limited to serpentine soils in chaparral and forest habitat. It is considered a species complex which includes Streptanthus brachiatus. S. morrisonii is divided into four subspecies and is variable. In general, it is a biennial herb producing a hairless, waxy stem up to 1. 2 to 1. 5 meters in maximum height, often branching at the tip. The basal leaves have fleshy, lance-shaped blades 3 to 5 centimeters long borne on petioles. The blades are gray-green on the upper surface and purple or purple-mottled underneath. Leaves higher on the stem are variable in shape and become smaller toward the top of the plant. Flowers occur at intervals along the upper stem. Each has an urn-shaped calyx of keeled sepals in shades of yellow-green to purple. The petals emerging from the tip are whitish with purple-brown veining. The fruit is a flattened straight or slightly curved silique up to 8 centimeters long. Threats to this species include boron toxicity from the steam of nearby geothermal power plants.
Plant Description
Plant Type
Plant Type
Perennial herb

3.9 - 4.9 ft tall

Flower Color
Flower Color
Yellow, White, Green, Purple, Brown

Wildlife Supported

Butterflies & moths hosted ( 5 likely * ) SHOW ALL

Landscaping Information
Natural Setting
Annual Precipitation: 19.9" - 70.8", Summer Precipitation: 0.36" - 0.72", Coldest Month: 42.3" - 49.0", Hottest Month: 67.5" - 74.4", Humidity: 1.35" - 22.33", Elevation: 455" - 3070"

Alternative Names
Common Names: Three Peaks Jewel-flower

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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