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Thaspium Nuttall. Meadow-parsnip.

Key to Thaspium

A genus of 5-6 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.

Key advice: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 for definition or see the legend. 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 ⭷
image of plant© Alan M. Cressler | Thaspium trifoliatum var. trifoliatum | Original Image ⭷
image of plant© Richard & Teresa Ware | Thaspium pinnatifidum CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷

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See something wrong or missing on about Thaspium? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months.