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Powell's Amaranth Back to Plant Page
Amaranthus powellii

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About Powell's Amaranth (Amaranthus powellii) Amaranthus powellii is a species of amaranth known by the common names Powell's amaranth and green amaranth. It is native to the southwestern United States and northern Mexico, but it is common throughout most of the rest of the temperate Americas as a naturalized species. It has also been introduced to other continents, including Australia and Europe. This is an erect annual herb growing to a maximum height near two meters. It has leaves up to 9 centimeters long, those on the upper part of the plant lance-shaped and lower on the stem diamond or roughly oval in shape. The inflorescence holds several long, narrow clusters of both male and female flowers interspersed with spiny green bracts. The fruit is a smooth dehiscent capsule about 3 millimeters long containing shiny reddish black seeds.
Plant Description
Plant Type
Annual herb

Max. Height
6.6 ft (2 m)

Native Status

Natural Setting
Elevation ?
0' - 7953'

Annual Precip. ?
5.2" - 75.4"

Summer Precip. ?
0.15" - 3.14"

Coldest Month ?
28.4° F - 56.1° F

Hottest Month ?
46.6° F - 79.4° F

Humidity ?
0.49 vpd - 30.15 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Green Amaranth

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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