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Caulophyllum giganteum (Farw.) Loconte & W. H. Blackw.  
Family: Berberidaceae
Giant Blue Cohosh
Caulophyllum giganteum image
Scott Namestnik
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Henry Loconte in Flora of North America (vol. 3)
Stems 2-7 dm. Leaves: 1st leaf (2-)3-ternate; 2d leaf (1-)2-ternate; leaflets 5-10 × 3-8 cm. Inflorescences with 4-18 flowers. Flowers: bracteoles 2-4 mm; sepals purple, red, brown, yellow, 6-9 × 1-4 mm, laterally revolute; petals 2-3 mm; stamen filaments 1.5-2.5 mm; pistil 3-5 mm; style 1-2 mm. 2 n = 16. Flowering early spring. Mesophytic forests; 0-700 m; Ont., Que.; Ky., Md., Mass., Mich., N.H., N.Y., N.C., Ohio, Pa., Tenn., Vt., Va., W.Va. Caulophyllum giganteum has a relatively northern distribution, and it flowers precociously; C . thalictroides has a broader distribution, extending farther south, flowers and fruits later, and is less precocious. Caulophyllum giganteum is treated as part of C . thalictroides by most authors.

Caulophyllum giganteum
Open Interactive Map
Caulophyllum giganteum image
Scott Namestnik
Caulophyllum giganteum image
Scott Namestnik
Caulophyllum giganteum image
Scott Namestnik
Caulophyllum giganteum image
Scott Namestnik
Caulophyllum giganteum image
Scott Namestnik
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The National Science Foundation
This project made possible by National Science Foundation Awards 1601697, 1600981, 1601393, 1600976, 1601429, 1601101, 1601503
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