Blue Cohosh Berries

July 18, 2026

Though they look like berries, these are actually seeds. Poisonous seeds. Like many plants, all parts of this plant, Blue Cohosh (Caulophyllum thalictroides), are toxic to humans. Even handling the plant can cause skin irritation.

The bright blue of the fleshy seed coats attract woodland birds. The bitter taste of the leaves discourage White-tailed Deer (Odocoileus virginianus) and other mammalian herbivores from eating the leaves and stems.

When I’m out roaming the woods, I’m not out there to eat what I find. I’m out just to take in the enormous amount of beauty there is along all the trails.

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Blue Cohosh

April 28, 2026

Small, pale yellow, blooming in the woods in late April. The blossoms of Blue Cohosh (Caulophyllum thalictroides).

A perennial that grows to a height of 1 to 3 feet tall. Its “berries” turn blue-black in mid-August. Not actually berries at all, but seeds with a covering which creates a berry appearance. And those berries look very much like the Blueberries (Vaccinium) that we put on our cereal at breakfast, add to muffins, and bake in pies. The berries of Blue Cohosh though are poisonous to humans. Birds can safely eat them though, and they thoroughly enjoy them.

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