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Hoffmann's Rockcress
Boechera hoffmannii
About Hoffmann's Rockcress (Boechera hoffmannii) 0 Nurseries Carry This Plant Boechera hoffmannii (formerly Arabis hoffmannii) is a rare species of flowering plant in the mustard family known by the common name Hoffmann's rockcress. It is endemic to the Channel Islands of California, where it is known from only three or four populations on two of the eight islands. A 2005 report estimated a remaining global population of 244 individual plants. It is a federally listed endangered species. This is a perennial herb producing one or more erect stems from a scaly, hairy caudex. The stems reach a maximum height between 50 and 70 centimeters and branch near the top. Leaves are densely clustered around the caudex in a basal rosette. They are lance-shaped, leathery with hairy undersides, and up to 10 centimeters long. There are more widely spaced leaves along the stem which are 3 to 6 centimeters long. The inflorescence bears many white or purple flowers with thick, dark sepals. The fruit is a tough, hairless silique up to 10 centimeters long containing 2 rows of seeds.
Plant Description
Plant Type
Plant Type
Perennial herb

1.6 - 2.3 ft tall

Flower Color
Flower Color
Pink, White, Purple

Wildlife Supported

Butterflies & moths hosted ( 3 likely * ) SHOW ALL

Landscaping Information
Natural Setting
Annual Precipitation: 12.0" - 19.5", Summer Precipitation: 0.15" - 0.17", Coldest Month: 46.8" - 53.9", Hottest Month: 62.0" - 70.4", Humidity: 1.44" - 14.92", Elevation: 155" - 1743"

Alternative Names
Common Names: Hoffmann's Rock Cress

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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