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Santa Cruz Island Rockcress
Sibara filifolia
  
0 Nurseries Carry This Plant

About Santa Cruz Island Rockcress (Sibara filifolia) 0 Nurseries Carry This Plant Sibara filifolia, known the common names Santa Cruz Island winged rockcress or Santa Cruz Island rockcres, is a rare species of flowering plant in the mustard family. It is endemic to the Channel Islands of California, where it is now known from a few occurrences on San Clemente Island and one population on Catalina Island. It was once present on Santa Cruz Island, and perhaps other Channel Islands, but these occurrences were extirpated by feral goats and pigs. The plant was feared extinct until small remaining occurrences were discovered in 1986. A 1995 estimate of the total remaining population was 500 individuals. The plant became a federally listed endangered species of the United States in 1997, along with Cercocarpus traskiae and Lithophragma maximum, two other rare Channel Islands plants. Sibara filifolia grows in the coastal sage scrub of two islands off the coast of southern California. Sibara filifolia is an annual herb producing a hairless, sometimes waxy stem up to around 30 centimeters in maximum height. The leaves are very narrow and almost strandlike, measuring less than a millimeter wide, and growing about 1. 5 centimeters long. The flowers each have four spoon-shaped lavender petals a few millimeters long. The fruit is a flattened, elongated silique up to 4 centimeters long containing tiny seeds. Distribution and habitat. Sibara filifolia grows in the coastal sage scrub of two islands off the coast of southern California.
Plant Description
Plant Type
Plant Type
Annual herb

Size
Size
11.8 in tall

Flower Color
Flower Color
Lavender

Landscaping Information
Natural Setting
Climate
Climate
Annual Precipitation: 8.8" - 19.0", Summer Precipitation: 0.15" - 0.29", Coldest Month: 48.2" - 57.5", Hottest Month: 63.0" - 71.1", Humidity: 1.67" - 15.81", Elevation: -75" - 1816"

Alternative Names
Common Names: Santa Cruz Island Winged Rockcress


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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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