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Mount Diablo Bird's-beak Back to Plant Page
Cordylanthus nidularius

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About Mount Diablo Bird's-beak (Cordylanthus nidularius) Cordylanthus nidularius is a rare species of flowering plant in the broomrape family known by the common name Mt. Diablo bird's beak. It is endemic to Mount Diablo in the San Francisco Bay Area in California, where it grows in chaparral on serpentine soils. This small annual herb is red-tinted gray-green in color and coated with glandular hairs and woolly fibers. The flowers are each surrounded by 2 or 3 bracts divided into three narrow lobes up to 1. 5 centimeters long. The corolla is a purple-streaked white pouch enclosed in a calyx of sepals.
Plant Description
Plant Type
Annual herb

Flower Color
Red, Brown

Native Status
Natural Setting
Elevation ?
1983' - 3219'

Annual Precip. ?
24.0" - 27.7"

Summer Precip. ?
0.36" - 0.42"

Coldest Month ?
47.2° F - 50.0° F

Hottest Month ?
65.5° F - 67.5° F

Humidity ?
5.12 vpd - 15.34 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Mt. Diablo Bird's-beak, Diablo Bird's Beak

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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