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Common (vernacular) names applied to California vascular plants

compiled by Elizabeth Painter

up to date as of May 1, 2016

Common names (also referred to as vernacular names) are applied differently at different times and places by different users. This list is compiled from many sources and is intended to be as comprehensive as possible. It is not intended to indicate which common name is correct or preferred. Please send comments about this page to Elizabeth Painter (

TaxonPolygonum bidwelliae
Family common name(s)buckwheat; smartweed; knotweed
Genus common name(s)polygonum; true knotweed
Species common name(s)Bidwell's polygonum; Bidwell's knotweed; Bidwell polygonum; Bidwell knotweed
Common name(s) generally applied to other taxa or multiple taxaknotweed, knot-weed, knot weed, buckwheat, buck-wheat, buck wheat, false buckwheat, false-buckwheat, doorweed, door-weed, door grass, door-grass, dooryard grass, door-yard grass, tear-thumb, tear thumb, tearthumb are applied to multiple Polygonaceae taxa; heart's-ease, heart's ease, hearts'-ease, hearts' ease, heartsease, lady's-thumb, lady's thumb, lady's-thumb, ladysthumb are applied to taxa in multiple families
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