UW Burke Herbarium species comparison

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Polygonum parryi

Polygonum erectum

Parry's knotweed, prickly knotweed

erect knotweed

Polygonum parryi

Polygonum erectum
Flowering time June-July June-September
Habitat Vernal pools, seasonally damp ground at low elevations. Dry, disturbed ground.
Distribution
Occurring in the east end of the Columbia River Gorge in Washington; south-central Washington to California.
[WildflowerSearch map]
[BONAP county map]
Occurring on both sides of the Cascades crest in Washington; Washington to Oregon and Nevada, east from the Rocky Mountains and northern Great Plains to the Altantic Coast.
[WildflowerSearch map]
[BONAP county map]
Origin Native Native
Conservation status Threatened in Washington (WANHP) Not of concern
Sibling taxa
P. achoreum, P. austiniae, P. aviculare, P. californicum, P. douglasii, P. erectum, P. fowleri, P. majus, P. minimum, P. nuttallii, P. paronychia, P. polygaloides, P. ramosissimum, P. sawatchense, P. spergulariiforme
P. achoreum, P. austiniae, P. aviculare, P. californicum, P. douglasii, P. fowleri, P. majus, P. minimum, P. nuttallii, P. paronychia, P. parryi, P. polygaloides, P. ramosissimum, P. sawatchense, P. spergulariiforme
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Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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