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Wayside Aster
Eucephalus vialis
About Wayside Aster (Eucephalus vialis) 0 Nurseries Carry This Plant Eucephalus vialis is a rare North American species of flowering plant in the aster family known by the common name wayside aster. It is native to southwestern Oregon and northwestern California in the United States. Eucephalus vialis is a perennial herb producing hairy, erect stems up to 1. 2 meters (4 feet) tall from a thick caudex. It spreads by means of rhizomes. The middle and upper leaves are widely lance-shaped and measure up to 9 centimeters (3. 6 inches) long by 3 cm (1. 2 inches) wide. The lower leaves are smaller and scale-like. They are coated with glandular hairs. They are dull green and sometimes toothed. The inflorescence is a small or very large array of flower heads. Each is about a centimeter (0. 4 inches) long and has layers of narrow phyllaries. Each head contains several yellow disc florets but no ray florets. However, some plants may have vestigial rays. Flowering occurs in July through September. While the plants sometimes reproduce sexually via seed, the populations often grow via vegetative reproduction. The species is self-incompatible and cannot reproduce via self-fertilization. It is an obligate outcrosser and must breed with other individuals, exchanging pollen. It is pollinated by Bombus vosnesenskii (a bumblebee), Lasioglossum sp. (a sweat bee), Epicanta puncticollis (a blister beetle), and Ochlodes sylvanoides (a skipper).
Plant Description
Plant Type
Plant Type
Perennial herb

3.3 - 6.6 ft tall

Flower Color
Flower Color

Landscaping Information
Common uses
Common uses
Butterfly Gardens, Bee Gardens

Natural Setting

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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