UW Burke Herbarium species comparison

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Polygonum achoreum

Polygonum californicum

Blake's knotweed

California knotweed

Polygonum achoreum

Polygonum californicum
Flowering time May-July
Habitat Dry rocky slopes, gravelly ground at low elevations.
Distribution
[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 Review Group 1 in Washington (WANHP)
Sibling taxa
P. austiniae, P. aviculare, P. californicum, P. douglasii, P. erectum, P. fowleri, P. majus, P. minimum, P. nuttallii, P. paronychia, P. parryi, P. polygaloides, P. ramosissimum, P. sawatchense, P. spergulariiforme
P. achoreum, P. austiniae, P. aviculare, P. douglasii, P. erectum, P. fowleri, P. majus, P. minimum, P. nuttallii, P. paronychia, P. parryi, 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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