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Aconogonon phytolaccifolium
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Poke Knotweed
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Aconogonon phytolaccifolium

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About Poke Knotweed (Aconogonon phytolaccifolium) Aconogonon phytolaccifolium is a species of flowering plant in the knotweed family known by the common name Poke knotweed . Aconogonon phytolaccifolium is native to the western United States: California, Oregon, Washington, Nevada, Idaho, and Montana. Aconogonon phytolaccifolium is a perennial herb up to 200 cm (79 in) tall. The lance-shaped or pointed oval leaves are 10 to 20 centimeters long and borne on petioles. The leaves have large stipules which form reddish ochrea up to 3 centimetres (1. 2 inches) long. The inflorescence is a long array of branching cluster of many white or greenish flowers. Each flower is about 4 millimetres (0. 16 inches) wide and has tiny protruding stamens tipped with yellow or pink anthers.
Plant Description
Plant Type
Perennial herb

Max. Height
1.6 - 6.6 ft (0.49 - 2 m)

Flower Color
White, Green, Red

Native Status

Natural Setting
Elevation ?
40' - 7993'

Annual Precip. ?
28.0" - 158.0"

Summer Precip. ?
1.04" - 5.80"

Coldest Month ?
29.4° F - 47.0° F

Hottest Month ?
52.4° F - 61.2° F

Humidity ?
0.47 vpd - 15.90 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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