Thalictrum

Thalictrum is a genus of 120-200 species of flowering plants in the family Ranunculaceae. They are perennial herbaceous plants, growing to 0.5-2.5 m tall depending on the species.

They are usually found in shaded or damp locations, with a sub-cosmopolitan range throughout most of the Northern Hemisphere and also south to southern Africa and tropical South America, but absent from Australasia. It is most common in temperate regions of the world, twenty-two species are found in North America.

The leaves are alternate, bipinnately compound, commonly glaucous blue-green in colour.
The flowers are small and apetalous (no petals), but have numerous long stamens, often brightly white, yellow, pink or pale purple, and are produced in conspicuous dense inflorescences. In some species (e.g. T. chelidonii, T. tuberosum), the sepals are large, brightly coloured and petal-like, but in most they are small and fall when the flower opens or soon after.

Thalictrum species are used as food plants by the larvae of some Lepidoptera species including Setaceous Hebrew Character.


Some species
Thalictrum dioicum (Early meadow-rue or Quicksilver-weed) is a species of herbaceous plants in the family Ranunculaceae. Plants are typically upright growing woodland natives from central and eastern North America including parts of south eastern Canada. This species has dioecious plants, with male and female flowers on separate plants blooming in early to mid spring.

Thalictrum polygamum, the tall meadow rue, is a native plant of eastern North America and derives its common name from its height of 1 to two meters (3-8 feet). The tall meadow rue is found in wet areas. The white flowers appear during summer.

Thalictrum thalictroides, the rue anemone, is a plant in the buttercup family, Ranunculaceae. This plant is a spring ephemeral endemic to the forests of eastern North America. It is also cultivated in shade gardens.

Thalictrum alpinum Alpine Meadow-rue

Thalictrum chelidonii

Thalictrum clavatum Mountain Meadow-rue

Thalictrum cooleyi Cooley's Meadow-rue

Thalictrum ichangense

Thalictrum javanicum

Thalictrum minus Lesser Meadow-rue

Thalictrum morrisonii

Thalictrum occidentalis Western Meadow-rue

Thalictrum delavayi Chinese Meadow-rue

Thalictrum aquilegifolium Greater Meadow-rue

Thalictrum calabricum

Thalictrum tubersosum Meadow-rue

Thalictrum orientale

Thalictrum kiusianum

Thalictrum lucidum

Thalictrum macrostylum Piedmont Meadow-rue or Small-leaved Meadow-rue

Thalictrum reniforme

Thalictrum dipterocarpum

Thalictrum fendleri Fendler's Meadow-rue

Thalictrum petaloideum

Thalictrum foetidum

Thalictrum glaucum

Thalictrum simplex Small Meadow-rue

Thalictrum flavum Yellow Meadow-rue or Common Meadow-rue

Thalictrum foeniculaceum

Thalictrum revolutum Waxyleaf Meadow-rue

Thalictrum rochebrunianum

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