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Annual Agoseris
Agoseris heterophylla
About Annual Agoseris (Agoseris heterophylla) 0 Nurseries Carry This Plant Agoseris heterophylla is a liguliferous species in the Asteraceae or sunflower family known by the common name annual agoseris or mountain dandelion. It is widespread in mostly drier regions of western North America from British Columbia to Baja California. This is an annual herb producing a basal rosette of leaves. The oblanceolate leaves may be toothed, pinnatifid, or entire, and no larger than 15 cm long and 1. 5 cm wide. Often there is no stem, or a short, rudimentary stem may develop, although the plant will produce several stem-like peduncles. Each solitary flower head contains one or two rows of sharp-pointed bracts, often with purplish hairs; and a corolla of yellow ray florets, but no disc florets. The fruit is an achene which can be highly variable but typically has a long beak and a terminal pappus of white bristles.
Plant Description
Plant Type
Plant Type
Annual Herb

Flower Color
Flower Color

Wildlife Supported

Butterflies & moths hosted ( 1 likely * ) SHOW ALL
Heliolonche modicella Image
Heliolonche modicellaHeliolonche modicella

Landscaping Information
Natural Setting
Annual Precipitation: 4.9" - 133.4", Summer Precipitation: 0.14" - 4.29", Coldest Month: 24.6" - 58.8", Hottest Month: 45.5" - 87.5", Humidity: 0.01" - 38.31", Elevation: -75" - 11310"

Alternative Names
Common Names: Annual Goatsbeard, Mountain Dandelion

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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