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Polygonum bolanderi
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Bolander's Knotweed
( Polygonum bolanderi )
Polygonum bolanderi
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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About Bolander's Knotweed (Polygonum bolanderi)
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Polygonum bolanderi
is an uncommon
California species
of flowering plant in the buckwheat family known by the common name Bolander's knotweed.
Polygonum bolanderi
is endemic to northern California, where it is known from the northern Coast Ranges, the southern Cascades, and the northern Sierra Nevada (from Humboldt County and Shasta, south as far as Sonoma county and Tuolumne County). It can be found in open, rocky habitats.
Polygonum bolanderi
is a small shrub producing numerous very thin twiglike branches up to about half a meter (20 inches) long from a tough, tangled base. The slender branches are lined with small, narrow, pointed leaves which are alternately arranged and mostly found clustered toward the tips of the twigs. The leaves have narrow, fringed stipules with sharp points. Flowers occur in upper leaf axils during summer and fall. They are whitish or pink with dark midveins on each corolla lobe.
Plant Description
Plant Type
Perennial herb
Size
0.7 - 2 ft tall
Flower Color
Pink, White
Wildlife Supported
Butterflies & moths hosted ( 17
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
*
White-lined Sphinx
Hyles lineata
Hyles lineata
*
Subterranean Dart
Feltia subterranea
Feltia subterranea
Landscaping Information
Natural Setting
Climate
Annual Precipitation: 26.1" - 98.9", Summer Precipitation: 0.33" - 3.27", Coldest Month: 36.5" - 50.4", Hottest Month: 53.4" - 75.5", Humidity: 0.88" - 24.22", Elevation: 64" - 6722"
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Bolander's Knotweed
Polygonum bolanderi
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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