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Epilobium brachycarpum
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Panicled Willow Herb
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Epilobium brachycarpum

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About Panicled Willow Herb (Epilobium brachycarpum) Epilobium brachycarpum is a species of willowherb known by the common names Tall Willowherb, Tall Annual Willowherb, Panicled Willowherb and Tall Fireweed. It is native to and widespread in North America, where it is a resident of varied open and woodland habitats. It has also been introduced to some areas in South America. This is a tall hairy, hairy annual herb occasionally reaching two meters in height. It is somewhat gangly and thin like an erect weed, with narrow, curving, pointed leaves up to a few centimeters in length. The flower has four petals which may be so deeply notched that they look like four pairs. They are generally light purple or pink, with darker veining. The fruit is a capsule 1 to 3 centimeters long.
Plant Description
Plant Type
Annual herb

Max. Height
0.7 - 7 ft (0.21 - 2.1 m)

Flower Color

Native Status

Natural Setting
Site Type
Dry open places, grassland, distrurbed places

Sun, Part Shade

Elevation ?
3' - 9233'

Annual Precip. ?
5.9" - 127.1"

Summer Precip. ?
0.14" - 3.86"

Coldest Month ?
25.6° F - 55.4° F

Hottest Month ?
48.7° F - 81.0° F

Humidity ?
0.28 vpd - 29.42 vpd

Sunset Zones ?
1, 2, 3, 4*, 5*, 6*, 7*, 8, 9, 14*, 15*, 16*, 17*, 18*, 19*, 20*, 21*, 22*, 23*, 24*

Landscaping Information
Common uses
Bird Gardens, Hummingbird Gardens

Other Names
Botanical Names
Epilobium paniculatum var. jucundum

Common Names
Tall Willowherb, Tall Fir, Tall Annual Willowherb, Panicled Willowherb

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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