UW Burke Herbarium species comparison

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Polygonum californicum

Polygonum oxyspermum

California knotweed

Polygonum californicum

Polygonum oxyspermum
Flowering time May-July
Habitat Dry rocky slopes, gravelly ground at low elevations.
Distribution
Occurring in the east end of the Columbia River Gorge in Washington; south-central Washington to California.
[WildflowerSearch map]
[BONAP county map]
[BONAP county map]
Origin Native
Conservation status Review Group 1 in Washington (WANHP)
Sibling taxa
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
P. achoreum, 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
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Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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