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Caulophyllum thalictroides (Linnaeus) Michaux. Common name: Common Blue Cohosh, Green Vivian. Phenology: Apr-May; Jul-Aug. Habitat: Rich forests. Distribution: NS, QC, ON, and MB, south to GA, AL, AR, and OK.

Origin/Endemic status: Native

Synonymy : = Ar, Can, FNA3, GrPl, Il, K4, Mi, NE, NS, NY, POWO, Tat, Tn, Va, W, Haines (2003c), Loconte & Blackwell (1981), Loconte & Blackwell (1984), Loconte & Blackwell (1985), Stearn (2002); = Caulophyllum thalictroides (L.) Michx. var. thalictroides — C; = Leontice thalictroides L.; < Caulophyllum thalictroides (L.) Michx. — F, G, Pa, RAB, S, S13

Links to other floras: = Caulophyllum thalictroides - FNA3

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Heliophily : 1

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image of plant© Gary P. Fleming
image of plant© Alan M. Cressler | Original Image ⭷
image of plant© Joey Shaw source | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Keith Bradley | Original Image ⭷

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Horticultural Information

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native range
Erect perennial of rich, deciduous forests.
Stem smooth with a blue-green tint and white-waxy coating.
Leaves 1 (2), petiolate, divided into many stalked, veiny, oval leaflets that are 1-3 in. long and irregularly toothed/lobed; blue-green and with a waxy coating.
Flowers in a branched terminal cluster, brownish-green to yellowish-green, ¼ in. wide, consisting of 6 sepals with nectar glands at the base (no real petals), 6 stamens, and a prominent ovary.
Fruit a conspicuous pair of deep blue, fleshy seeds.
The very similar Caulophyllum giganteum blooms a little earlier and has larger (1/2 in. across), more purplish flowers.
1-3 ft.
Erect perennial of rich, deciduous forests.
Stem smooth with a blue-green tint and white-waxy coating.
Leaves 1 (2), petiolate, divided into many stalked, veiny, oval leaflets that are 1-3 in. long and irregularly toothed/lobed; blue-green and with a waxy coating.
Flowers in a branched terminal cluster, brownish-green to yellowish-green, ¼ in. wide, consisting of 6 sepals with nectar glands at the base (no real petals), 6 stamens, and a prominent ovary.
Fruit a conspicuous pair of deep blue, fleshy seeds.
The very similar Caulophyllum giganteum blooms a little earlier and has larger (1/2 in. across), more purplish flowers.
eastern North America


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