Tag Archives: Polygonum davisiae

Davis’ Knotweed

Davis’ knotweed (Aconogonon davisiae) grows amid talus or on rocky sites where snow accumulates between 5,000 and 10,000 feet in Oregon, Washington, California and Idaho. Leonard and I found these Davis’ knotweed plants in August near the Lassen Peak Trailhead … Continue reading

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