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Panamint Butterfly Bush
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Buddleja utahensis
  

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About Panamint Butterfly Bush (Buddleja utahensis) Buddleja utahensis is a species of Buddleja endemic to the southwestern United States (northwest Arizona, eastern California, southern Nevada, and southwestern Utah), where it is known by the common names Utah butterfly bush and Panamint butterfly bush. Named and described by Coville in 1892, the shrub favours limestone outcrops at elevations of 700-2000 m, where it is often found in association with Joshua trees. B. utahensis is a compact, dwarf dioecious shrub reaching 0. 3-1. 0 m in height. The bark is rimose and greyish, while the plant structure is characterized by persistent naked twigs. The younger branches are terete, bearing subsessile linear to oblong leaves 1. 5-3. 5 cm long by 0. 3-0. 5 cm wide, rounded at the apex and attenuate at the base. Both surfaces of the leaves are densely short tomentose, bestowing a silver-grey appearance. The inflorescences are 4-12 cm long, with 3-7 pairs of heads forming verticels, subtended by leafy bracts. The verticels are 0. 5-1. 13 cm in diameter, each comprising 15-30 pale yellow flowers, the corollas 4-5 mm long. Capsules are up to 2. 5 mm long, with numerous globose seeds up to 0. 4 mm in diam. B. utahensis is very rare in cultivation; it is a difficult plant to raise in temperate regions, demanding very free draining soil and infrequent watering. Hardiness: USDA zone 8.
Plant Description
Plant Type
Shrub

Native Status
Native

Natural Setting
Elevation ?
1931' - 7818'

Annual Precip. ?
4.1" - 64.3"

Summer Precip. ?
0.50" - 3.43"

Coldest Month ?
36.1° F - 53.2° F

Hottest Month ?
56.8° F - 81.8° F

Humidity ?
2.87 vpd - 35.15 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available


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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