California Native Plant Society
Tap map to see plants native to location
Astragalus miguelensis
Please enter either the common name or the botanical name of any native California plant species to see it's plant record

San Miguel Island Milkvetch
  • Added Add to My Plant List
Astragalus miguelensis

Zoom To My AddressZoom To California Estimated Plant Range

About San Miguel Island Milkvetch (Astragalus miguelensis) Astragalus miguelensis is a rare species of milkvetch known by the common name San Miguel milkvetch. It is endemic to five of the eight Channel Islands of California. This is a mat-forming perennial herb growing in wide, thick patches on rocky seaside bluffs and beaches. The abundant leaves are up to 12 centimeters long and are made up of many woolly oval-shaped leaflets. The inflorescence bears up to 30 white to yellowish flowers, each between one and two centimeters long. The fruit is an inflated legume pod drying to a papery texture. It is up to about 2. 5 centimeters in length.
Plant Description
Plant Type
Perennial herb

Max. Height
0.33 - 1.3 ft (0.1 - 0.4 m)

Flower Color
Yellow, White

Native Status
Natural Setting
Elevation ?
-4278' - 2360'

Annual Precip. ?
4.9" - 18.2"

Summer Precip. ?
0.15" - 0.92"

Coldest Month ?
43.4° F - 57.6° F

Hottest Month ?
60.3° F - 86.1° F

Humidity ?
1.30 vpd - 37.57 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
San Miguel Milkvetch

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

Sign in to your Calscape Account X

Once signed in, you'll be able to access any previously saved plant lists or create new ones.

Email Address

Sign In

Copyright © 1999-2014 California Native Plant Society. All rights reserved.