# blue cohosh (*Caulophyllum thalictroides*) Blue cohosh is a special plant with beautiful blue-green leaves and tiny yellow flowers. It grows in shady forests and is known for its unique color and shape! - **Category:** [Plants](https://www.snappit.app/explore/categories/plant) - **Rarity:** Common - **Danger:** 3/5 · Moderate - **Snaps:** 12 - **Habitat:** Forests ![blue cohosh](https://commons.wikimedia.org/w/index.php?title=Special:Redirect/file/Blue_Cohosh.jpg&width=800) Photo: carol, CC BY-SA 3.0 · [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Blue_Cohosh.jpg) ## Appearance The blue cohosh is a striking woodland plant with large, three-parted leaves that create a distinct, bushy appearance. Its small, greenish-yellow to brownish-purple flowers emerge in spring, followed by unique, bright blue, pea-sized berries that persist into fall. ## Taxonomy - **Kingdom:** Plantae - **Phylum:** Tracheophyta - **Class:** Magnoliopsida - **Order:** Ranunculales - **Family:** Berberidaceae - **Genus:** Caulophyllum ## Interesting facts - Despite its name, its small flowers are actually yellowish-green, not blue! - It’s one of the first plants to poke through the leaf litter on the forest floor each spring. - The 'blue' in its name comes from its stunning, deep blue seeds, not its blooms. - This plant’s gnarled rootstock was traditionally used in many herbal remedies. ## Special abilities - **Underground Powerhouse:** Blue cohosh has a thick rhizome that helps it store energy and spread underground, allowing it to survive harsh winters. - **Berry Broadcast:** Blue cohosh produces bright blue berries that attract birds, helping the plant disperse its seeds far and wide. - **Nature's Repellent:** Blue cohosh produces compounds that make its roots and seeds moderately toxic, helping deter hungry animals. ## Measurements & details - **Height:** 30-90 cm - **Spread:** 20-40 cm - **Flower Size:** 0.5-1 cm - **Bloom Season:** Spring - **Edible:** No - **Toxicity:** Moderate - **Lifecycle:** Perennial - **Pollination Method:** Insect ## Ecological connections - **Pollinates:** Common Eastern Bumblebee (*Bombus impatiens*) — Visits the small flowers for nectar and pollen. - **Eats:** [American Robin](https://www.snappit.app/explore/american-robin) (*Turdus migratorius*) — Consumes blue berries, helping disperse the plant's seeds. - **Pollinates:** Striped Sweat Bee (*Halictus ligatus*) — Feeds on nectar and pollen from the tiny blooms. ## Traits - [Aromatic](https://www.snappit.app/explore/traits/aromatic): Aromatic plants produce and emit fragrant volatile organic compounds, often for defense or to attract pollinators. - [Deciduous](https://www.snappit.app/explore/traits/deciduous): Deciduous plants periodically shed all their leaves, typically during autumn or dry seasons. - [Flowering](https://www.snappit.app/explore/traits/flowering): Flowering plants are any plants that produce flowers as part of their reproductive cycle. - [Shade Tolerant](https://www.snappit.app/explore/traits/shade-tolerant): Shade tolerant plants are adapted to grow and thrive in areas with low light levels, requiring less direct sunlight. - [Spring Blooming](https://www.snappit.app/explore/traits/spring-blooming): Spring blooming plants produce their flowers during the spring season, often signifying the end of winter and the start of new growth. - [Fruit Bearing](https://www.snappit.app/explore/traits/fruit-bearing): Fruit-bearing plants produce fruits, which are the mature ovaries of flowering plants containing seeds. - [Medicinal](https://www.snappit.app/explore/traits/medicinal): Medicinal plants possess chemical compounds that can be used for therapeutic purposes to treat illnesses or maintain health. - [Colorful](https://www.snappit.app/explore/traits/colorful): Colorful describes organisms or objects displaying a wide range of bright and distinct colors. - [Forest](https://www.snappit.app/explore/traits/forest): Forest habitats are terrestrial environments dominated by dense tree cover, supporting a high diversity of plant and animal life. - [Endangered](https://www.snappit.app/explore/traits/endangered): Endangered status indicates a species is at a very high risk of extinction in the wild in the near future. ## Collections - [Plants](https://www.snappit.app/explore/collections/plants) ## Safety **Danger:** 3/5 · Moderate Do not touch or eat any wild plants without asking an adult first. ## Frequently Asked Questions ### How to identify blue cohosh? Start with the whole plant, then compare leaf arrangement, leaf edges, stems and any flowers or fruit. Opposite leaves grow in pairs; alternate leaves come one at a time along the stem. These details tell you far more together than a single green leaf does. Plant Identifier: upload a photo and compare the visible details. ### How tall is blue cohosh? 30-90 cm ### How wide does blue cohosh spread? 20-40 cm ### How big are the flowers on blue cohosh? 0.5-1 cm ### When does blue cohosh bloom? Spring ### Is blue cohosh edible? No ### Is blue cohosh toxic? Moderate ### What is blue cohosh's lifecycle? Perennial ## Where to spot - [Blackhand Gorge State Nature Preserve](https://www.snappit.app/guides/places/blackhand-gorge-state-nature-preserve) — Ohio, US · Nature Reserve - [Mitchell Park Horticultural Conservatory](https://www.snappit.app/guides/places/mitchell-park-horticultural-conservatory) — Wisconsin, US · Botanical Garden - [Russian Village Historic District](https://www.snappit.app/guides/places/russian-village-historic-district) — Connecticut, US · Historic District - [Battle of Camp Allegheny](https://www.snappit.app/guides/places/battle-of-camp-allegheny) — West Virginia, US · Historic Site - [Beaver Creek State Forest](https://www.snappit.app/guides/places/beaver-creek-state-forest) — Ohio, US · Forest - [Fort Atkinson](https://www.snappit.app/guides/places/fort-atkinson) — Iowa, US · Forest [View all places to see blue cohosh](https://www.snappit.app/guides/where-to-see/blue-cohosh) ## More Plants - [white snakeroot](https://www.snappit.app/explore/white-snakeroot) (*Ageratina altissima*) - [tree-of-heaven](https://www.snappit.app/explore/tree-of-heaven) (*Ailanthus altissima*) - [western sword fern](https://www.snappit.app/explore/western-sword-fern) (*Polystichum munitum*) - [common milkweed](https://www.snappit.app/explore/common-milkweed) (*Asclepias syriaca*) --- Source: [Blue Cohosh: Facts & Places to See — Snappit](https://www.snappit.app/explore/blue-cohosh)