''Caulophyllum giganteum'', the northern blue cohosh, is a species of flowering plant in the
barberry family. It is native primarily to northeastern North America, where it is found in rich forests.
''Caulophyllum giganteum'' produces around four to eighteen purple flowers in early spring. It blooms around 10–15 days earlier than its relative, ''
Caulophyllum thalictroides
''Caulophyllum thalictroides'', the blue cohosh, a species of ''Caulophyllum'' (family Berberidaceae) is a flowering plant in the Berberidaceae (barberry) family. It is a medium-tall perennial with blue berry-like fruits and bluish-green foliage. ...
''. ''C. thalictroides'' also differs by having more abundant flowers that are yellow or green.
Flora of the Southern and Mid-Atlantic States
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References
{{Taxonbar, from=Q15326202
Berberidaceae
Flora of the Northeastern United States
Flora of Eastern Canada
Flora without expected TNC conservation status