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Serpentine Sunflower
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Helianthus bolanderi
  

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About Serpentine Sunflower (Helianthus bolanderi) Helianthus bolanderi is a species of sunflower known by the common names serpentine sunflower and Bolander's sunflower. It is native to California and Oregon, where it grows mainly in mountainous areas, often in serpentine soils. This wild sunflower is an erect annual reaching heights over a meter. It has a hairy, rough stem with leaves lance- or oval-shaped, usually pointed, sometimes serrated along the edges, and 3 to 15 centimeters long. The flower cluster holds one or more flower heads, and each plant may have many flower clusters growing along the full length of the stem. The flower head has a cup of long, pointed phyllaries holding an array of bright yellow ray florets each one to two centimeters long around a center of yellow to dark purple or reddish disc florets. The achene is 3 to 5 millimeters long.
Plant Description
Plant Type
Perennial herb, Annual herb

Max. Height
5 Feet (1.5Mts)

Flower Color
Yellow

Flowering Season
Summer, Fall
Spring
Summer
Fall
Winter


Native Status
Native

Natural Setting
Site Type
Grassy places

Sun
Sun

Elevation ?
3' - 5013'

Annual Precip. ?
5.2" - 74.9"

Summer Precip. ?
0.18" - 2.56"

Coldest Month ?
31.8° F - 54.1° F

Hottest Month ?
56.0° F - 76.4° F

Humidity ?
0.33 vpd - 26.72 vpd

Sunset Zones ?
4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17*, 18, 19*, 20*, 21*, 22*, 23*, 24*

Landscaping Information
Ease of Care
Moderately Easy

Water Requirement ?
Low, Moderate - High
Extremely Low
Very Low
Low
Moderate - High


Common uses
Bird Gardens, Bee Gardens

Nursery Availability
Rarely Available

Other Names
Common Names
Bolander's Sunflower


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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