description
Blue cohosh is a flowering plant in the Berberidaceae (barberry) family. It
should not be confused with Black cohosh, which is a plant in a different
genus.
Blue cohosh is an erect plant with tall blue flower stem. It has a height of
up to 3 feet and a width of 1 ½ feet. The flowers are 5 petaled,
yellow-green, on the top of tall stalks. The leaves are thin, bluish green,
oval shape with lobes from 1-4 inches long. It blooms from June to August.
The fruit is blue-black and ⅓ inch in diameter. The rhizome is knotty,
branched, brownish gray with white inside. They taste bitter and acrid.
From the single stalk rising from the ground, there is a single, large,
three-branched leaf plus a fruiting stalk. The bluish-green leaflets are
tulip-shaped, entire at the base, but serrate at the tip. This plant's
three-lobed, veined leaves are dark purple when they emerge and later turn
green.
Greenish brown or yellowish brown flowers appear in mid and late spring,
turning into waxy blue berries that dangle beneath the leaves. Berries
split open to reveal berry-like seeds that turn from green to blue. Very
slow to increase in size.
common names & nomenclature
The name Cohosh is an Algonquin name and was given to both blue and
black because of their similarity in looks (roots) and actions. Blue refers
to the bluish stem and berries. The name Caulophyllum describes the leaf
habit. The species name, thalictroides, comes from the similarity between
the large highly divided; multiple-compound leaves of Meadow-rue
(Thalictrum) and those of Blue Cohosh.
Also known as:
papoose root, squaw root, beechdrops, blueberry root, blue ginseng, yellow ginseng