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Resin Birch
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Betula glandulosa
  

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About Resin Birch (Betula glandulosa) Betula glandulosa, American Dwarf Birch, also known as Resin Birch or Shrub Birch, is a species of birch native to North America, occurring in arctic and cool temperate areas from Alaska east to Newfoundland and southern Greenland, and south at high altitudes to northern California and Colorado in the west, and locally south to northern New York in the east. In the Arctic it occurs down to sea level, while in the south of the range, it grows as high as 3400 meter altitude. In Mid October 2007 a thicket of this plant was observed in flower in the foothills behind Palo Alto, California amidst Oaks, Bay Laurel and Manzanita. American Dwarf Birch is a multi-stemmed shrub typically growing to 1-3 meter tall, often forming dense thickets. The trunks are slender, rarely over 5-10 centimeter diameter, with smooth, dark brown bark. The leaves are nearly circular to oval, 0.5-3 centimeter long and 1.2.5 centimeter broad, with a toothed margin. The fruiting catkins are erect, 1-2.5 centimeter long and 5-12 millimeter broad.
Plant Description
Plant Type
Shrub

Native Status
Natural Setting
Site Type
Streams, meadow edges

Sun
Sun

Elevation ?
4340' - 8692'

Annual Precip. ?
22.2" - 68.3"

Summer Precip. ?
1.21" - 2.35"

Coldest Month ?
27.3° F - 37.1° F

Hottest Month ?
48.2° F - 63.2° F

Humidity ?
0.98 vpd - 17.75 vpd

Sunset Zones ?
1*, 2*, 3*, 7*, 14, 15, 16

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Botanical Names
Betula pumila


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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