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Island Senecio
Senecio lyonii
About Island Senecio (Senecio lyonii) 1 Nurseries Carry This Plant Senecio lyonii is an uncommon species of flowering plant in the aster family known by the common name island senecio. This island endemic is known only from Guadalupe Island off the coast of Baja California and two of the Channel Islands of California, Catalina and San Clemente Islands. It grows in the coastal sage scrub and chaparral of the islands' hills and canyons. It is a shrub or subshrub growing from a woody taproot and reaching top heights well over one meter. The leaves have blades up to 12 centimeters long which are divided deeply into many narrow lobes. The inflorescence is made up of many clusters of flower heads. Each head has narrow phyllaries usually tipped with black, yellow disc florets and a fringe of yellow ray florets each about a centimeter long.
Plant Description
Plant Type
Plant Type

3.3 ft tall

Flower Color
Flower Color

Wildlife Supported

Landscaping Information

Natural Setting
Annual Precipitation: 7.8" - 13.9", Summer Precipitation: 0.19" - 0.29", Coldest Month: 53.2" - 57.5", Hottest Month: 65.2" - 72.8", Humidity: 1.44" - 17.38", Elevation: -89" - 1647"

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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