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Caulophyllum thalictroides

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Plant types and subtypes: SALE, Perennials

Light Requirements: part-shade, shade

Water Use: medium

Soil Moisture: moist

Soil Description: acid, neutral, rich, loam

Height: 1'-3'

Bloom Time: April, May

Bloom Color: yellow, green, brown

Leaf Color: green, blue-green

Hardiness Zone: 3, 4, 5, 6, 7

Additional Tags: berries, colonizing, deer resistant, fall interest, ornamental foliage, poisonous, shade garden plant, showy fruit, woodland plant

Flower and leaves of Caulophyllum thalictroides (blue cohosh)
  • Flower and leaves of Caulophyllum thalictroides (blue cohosh)
  • Berries of Caulophyllum thalictroides (blue cohosh)
  • Flower of Caulophyllum thalictroides (blue cohosh)
  • Flower of Caulophyllum thalictroides (blue cohosh)

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Description

Caulophyllum thalictroides

Also known as:

blue cohosh

,

caulophylle faux-pigamon

,

papoose-root

,

squaw-root

Scientific Synonyms:

Description

The blue cohosh is not as much valued for its inconspicuous, greenish-brown flowers, as it is for its blue-green compound foliage and showy, blue berry-like fruit which appear in summer and give the plant interest well into fall.

Cultivation

Caulophyllum thalictroides grows in neutral to slightly acidic soil, rich in organic matter. It will prefer a shady spot where it will not be allowed to dry out in summer. It is best used in groupings where it will slowly colonize by means of rhizomes. It has a short bloom time in April or May. Zones 3-7

Propagation

Propagated by division. Propagation from seed is slow, as seedlings may take up to 4 years to produce flowers.

Additional Notes

All parts of the plant may cause skin irritation. Berries can be toxic if ingested and are best kept away from children.

Native Range & Classification

Recorded County Distribution: USDA data

Native Range:
AL, AR, CT, DE, GA, IA, IL, IN, KS, KY, MA, MD, ME, MI, MN, MO, NC, ND, NE, NH, NJ, NY, OH, OK, PA, RI, SC, SD, TN, VA, VT, WI, WV

USDA Endangered Status:

  • Threatened: RI

Classification

Kingdom Plantae Plants
Subkingdom Tracheobionta Vascular plants
Superdivision Spermatophyta Seed plants
Division Magnoliophyta Flowering plants
Class Magnoliopsida Dicotyledons
Subclass Magnoliidae
Order Ranunculales
Family Berberidaceae Barberry family
Genus Caulophyllum cohosh
Species Caulophyllum thalictroides blue cohosh