''Polygonum achoreum'', common names Blake's knotweed,
[ leathery knotweed or striate knotweed, is a North American species of plants in the ]buckwheat family
The Polygonaceae are a family of flowering plants known informally as the knotweed family or smartweed—buckwheat family in the United States. The name is based on the genus ''Polygonum'', and was first used by Antoine Laurent de Jussieu in 1789 ...
. It is widespread across much of Canada and the northern United States.
''Polygonum achoreum'' is an herb up to tall with yellow-green flowers in flat-topped clusters.[Flora of North America, ''Polygonum achoreum'' S. F. Blake, 1917. ]
/ref>Blake, Sydney Fay. 1917. Rhodora 19(226): 232–234
descriptions in English and Latin, commentary in English
References
External links
photo of herbarium specimen at Missouri Botanical Garden, collected in Missouri in 1993
achoreum
Flora of Canada
Flora of the United States
Plants described in 1917
{{Polygonaceae-stub