UW Burke Herbarium species comparison

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Polygonum minimum

Polygonum parryi

leafy dwarf knotweed, zigzag knotweed

Parry's knotweed, prickly knotweed

Polygonum minimum

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



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