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Thaspium Nuttall. Meadow-parsnip.

Key to Thaspium

A genus of 3-6 species, perennial herbs, temperate, of e. North America (Plunkett et al. 2018a). Thaspium and Zizia are closely related (sister to one another) and their traditional separation as genera should be re-evaluated.

ID notes:Because Thaspium and Zizia are often confused when not in fruit, a combined key emphasizing vegetative characters has been provided; it may also be helpful to use the key to genera, and if a clear answer is obtained, then use the Thaspium-Zizia combined key, skipping taxa of the "wrong" genus.

Ref: Cooperrider (1985); Coulter & Rose (1900); Floden (2019); Mathias & Constance (1945); Plunkett et al. (2018a) In Kadereit & Bittrich (2018). Show full citations.

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image of plant© Bruce A. Sorrie | Thaspium barbinode | Original Image ⭷

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