Advanced Search Map Locator
Add Current Plant To List Edit Current Plant
My Plant Lists Nurseries Planting Guide Contact Calscape About Calscape
Tap map to see plants native to location
Order by Popularity Order by Common Name Order by Botanical Name
Show All Plants Show Only Plants in Nurseries
Grid view Text view
California Dandelion Back to Plant Page
Agoseris grandiflora

Zoom To My AddressZoom To California Estimated Plant Range

About California Dandelion (Agoseris grandiflora) Agoseris grandiflora is a species of flowering plant in the daisy family known by the common names bigflower agoseris and grassland agoseris. It is native to western North America from British Columbia to California to Utah, where it grows in many habitat types. This is a perennial herb producing a basal patch of leaves of various shapes reaching maximum lengths of 50 centimeters. There is usually no stem, but there is sometimes a rudimentary one. The upright part of the plant is actually the peduncle of the flower cluster, which can approach a meter in height. It is coated in soft white hairs. The flower head at the top is up to 4 centimeters wide and lined with reddish or purplish green phyllaries with curling tips.
Plant Description
Plant Type
Perennial herb

Max. Height
1.8 - 3.3 ft (0.5 - 1 m)


Growth Rate

Flower Color

Flowering Season

Native Status

Natural Setting
Site Type
Grassy and woodland ares

Sun, Part Shade

Elevation ?
-87' - 11395'

Annual Precip. ?
9.0" - 125.9"

Summer Precip. ?
0.14" - 4.48"

Coldest Month ?
22.2° F - 54.2° F

Hottest Month ?
45.3° F - 80.8° F

Humidity ?
0.01 vpd - 27.86 vpd

Soil Description
Adaptable, tolerant of sand, loam and clay

Landscaping Information
Water Requirement ?
Extremely Low
Very Low
Moderate - High

Propagation ?
For propagating by seed: No treatment. ( Emery and Frey 1971).

Nursery Availability
Sometimes Available

Other Names
Common Names
Grassland Agoseris, Bigflower Agoseris

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