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Silver Wormwood
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Artemisia ludoviciana
  

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About Silver Wormwood (Artemisia ludoviciana) Artemisia ludoviciana is a species of sagebrush known by several common names, including silver wormwood, white sagebrush, and gray sagewort. It is native to North America where it is widespread coast to coast, but many subspecies are found only in the western United States. This is a rhizomatous perennial herb growing to heights between 30 centimeters and one meter. The stems bear linear leaves up to 11 centimeters long. The stems and foliage are covered in woolly gray or white hairs. The top of the stem is occupied by a narrow flower cluster of many nodding flower heads. Each small head is a cup of hairy phyllaries surrounding a center of yellowish disc florets and is about half a centimeter wide. The fruit is a minute achene. This plant was used by many Native American groups for a variety of medicinal, veterinary, and ceremonial purposes.
Plant Description
Plant Type
Perennial herb

Max. Height
3.3 ft (1 m)

Flower Color
Cream, White, Yellow

Flowering Season
Spring, Summer, Fall
Spring
Summer
Fall
Winter


Native Status
Native

Natural Setting
Site Type
Dry, sandy and rocky places

Sun
Sun

Elevation ?
5' - 14460'

Annual Precip. ?
4.8" - 90.6"

Summer Precip. ?
0.15" - 3.63"

Coldest Month ?
17.9° F - 59.1° F

Hottest Month ?
38.4° F - 87.7° F

Humidity ?
0.69 vpd - 38.56 vpd

Soil Description
Performs best and lives longest in well drained soil

Drainage
Fast

Landscaping Information
Ease of Care
Moderately Easy

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


Common uses
Groundcovers, Butterfly Gardens, Deer Resistant, Bird Gardens

Nursery Availability
Commonly Available

Other Names
Common Names
Mugwort


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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