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Arabis Linnaeus. Rockcress.

Key to Arabis

The circumscription of Arabis is in flux; there is increasing evidence that the broad circumscription traditionally employed in most North American floras includes discordant elements. Based on molecular phylogenetic studies and morphology, the members of Arabis (as circumscribed most broadly) in our area should be divided into at least 4 genera, as follows: Arabidopsis, Arabis sensu stricto, Boechera, and Turritis.

Ref: Al-Shehbaz (1988a); Al-Shehbaz (2003); Al-Shehbaz (2010a) In Flora of North America Editorial Committee (2010); Al-Shehbaz (2017); Hopkins (1937); Koch & Al-Shehbaz (2002); Koch, Bishop, & Mitchell-Olds (1999); Rollins (1993). 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© Alan M. Cressler | Arabis georgiana | Original Image ⭷
image of plant© Gary P. Fleming | Arabis patens | Original Image ⭷