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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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Hover over a shape, letter, icon, or arrow on the map to see what it means. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.

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