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Dune Ragwort
Senecio blochmaniae
About Dune Ragwort (Senecio blochmaniae) 2 Nurseries Carry This Plant Senecio blochmaniae is an uncommon species of flowering plant in the aster family known by the common names dune ragwort and Blochman's ragwort. It is endemic to the Central Coast of California, where it is known only from the direct coastline of San Luis Obispo and Santa Barbara Counties. It grows in sand dunes and sandy areas on coastal floodplains. It is a subshrub producing several arching stems often well exceeding a meter tall from a thick taproot. The stems are covered in many leaves, which are linear in shape, thick, and measure up to 12 centimeters long. The lower leaves become dry and curl up. The flower heads are lined by about 13 green-tipped phyllaries. They contain many yellow disc florets and each has usually 8 narrow yellow ray florets about a centimeter long.
Plant Description
Plant Type
Plant Type

2 - 4 ft tall

Flower Color
Flower Color
Yellow, Green

Flowering Season
Flowering Season
Spring, Summer, Fall

Wildlife Supported

Landscaping Information
Full Sun


Ease of Care
Ease of Care
Moderately Easy

For propagating by seed: No treatment.

Sunset Zones
Sunset Zones?
14*, 15, 16, 17, 19, 20, 21, 22*, 23*, 24

Natural Setting
Site Type
Site Type
Dunes, floodplains

Annual Precipitation: 13.6" - 25.5", Summer Precipitation: 0.18" - 0.30", Coldest Month: 46.8" - 51.4", Hottest Month: 62.6" - 69.6", Humidity: 0.74" - 14.08", Elevation: 3" - 1162"

Alternative Names
Common Names: Blochman's Ragwort

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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