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Polygonum ramosissimum
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Bushy Knotweed
( Polygonum ramosissimum )
Polygonum ramosissimum
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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About Bushy Knotweed (Polygonum ramosissimum)
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Polygonum ramosissimum
is a North American species of herbaceous annual plants in the buckwheat family, widespread across much of Canada and the United States, where it is commonly called bushy knotweed.
Polygonum ramosissimum
has erect stems growing 30 to 100 cm (12 to 39. 5 in) (sometimes to 200 cm or 80 inches) tall, with yellowish-green to blue-green foliage. The stems are freely branched with closed flowers produced in groups of (1) 2 to 3(5) flowers in the upper ocreae of racemes that are up to 15 cm (6 in) long, the inflorescences are spike-like. The greenish-yellow, rarely pink or white marked flowers, are on pedicels that are longer than the calyx. The calyx is around 3 mm (0. 12 in) long and 5-parted with the outer three sepals longer than the inner sepals. The seeds are produced in fruits called achenes, which are egg-shaped, dark brown and around 3 mm (0. 12 in) long. The achenes also have a smooth shiny surface. The late season achenes are larger, from 4 to 15 mm long.
Polygonum ramosissimum
has erect stems growing 30 to 100 cm (12 to 39. 5 in) (sometimes to 200 cm or 80 inches) tall, with yellowish-green to blue-green foliage. The stems are freely branched with closed flowers produced in groups of (1) 2 to 3(5) flowers in the upper ocreae of racemes that are up to 15 cm (6 in) long, the inflorescences are spike-like. The greenish-yellow, rarely pink or white marked flowers, are on pedicels that are longer than the calyx. The calyx is around 3 mm (0. 12 in) long and 5-parted with the outer three sepals longer than the inner sepals.
Plant Description
Plant Type
Annual herb
Size
1 - 6.6 ft tall
Flower Color
Yellow, Green
Wildlife Supported
Butterflies & moths hosted ( 23
likely
* )
SHOW ALL
*
Gray Hairstreak
Strymon melinus
Strymon melinus
*
Acmon Blue
Icaricia acmon
Icaricia acmon
*
Nivalis Copper
Lycaena nivalis
Lycaena nivalis
*
Lustrous Copper
Lycaena mariposa
Lycaena mariposa
*
Purplish Copper
Lycaena helloides
Lycaena helloides
*
Ruddy Copper
Lycaena rubidus
Lycaena rubidus
*
White-lined Sphinx
Hyles lineata
Hyles lineata
Landscaping Information
Natural Setting
Climate
Annual Precipitation: 2.6" - 51.8", Summer Precipitation: 0.17" - 1.84", Coldest Month: 30.1" - 59.2", Hottest Month: 59.6" - 88.6", Humidity: 0.37" - 40.49", Elevation: -185" - 6770"
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Bushy Knotweed
Polygonum ramosissimum
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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