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Gander's Ragwort
Packera ganderi
About Gander's Ragwort (Packera ganderi) 0 Nurseries Carry This Plant Packera ganderi is a rare species of flowering plant in the aster family known by the common name Gander's ragwort. It is endemic to southern California, where it is known from a few occurrences in San Diego and Riverside Counties. There are an estimated 4000 plants in existence, but this number varies year to year because the plant becomes more abundant after its habitat burns in wildfires. Packera ganderi is a perennial herb producing a single erect stem which grows to a maximum height of 50 to 80 centimeters. It is mostly hairy and green, but may have some fuzzy areas and a purple tinge. The leaves have rounded or oval blades with toothed edges or shallow lobes. The blades are often thick and somewhat tough, measuring a few centimeters long and borne on petioles longer than themselves. Leaves occurring farther up the stem are smaller and most lack petioles. The inflorescence contains up to 6 or 8 flower heads, each lined with green-tipped, yellow-edged phyllaries. The head contains many golden yellow disc florets and several orange ray florets each about a centimeter long.
Plant Description
Plant Type
Plant Type
Perennial herb

1.6 - 2.6 ft tall

Flower Color
Flower Color
Yellow, Green

Landscaping Information
Natural Setting
Annual Precipitation: 15.2" - 32.0", Summer Precipitation: 0.44" - 1.79", Coldest Month: 42.4" - 50.1", Hottest Month: 66.6" - 77.3", Humidity: 1.32" - 23.74", Elevation: 1594" - 5120"

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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