Data mode


Sign up

Copy permalink to share

*Mahonia Nuttall. Subfamily: Berberidoideae. Mahonia, Oregon-grape.

Key to Mahonia

A genus of about 100 species, shrubs, of e. Asia and w. North America south to Central America. It became fashionable in the 1990s to 2010s to merge Mahonia into Berberis, because of a group of species then placed in Mahonia that rendered it paraphyletic. Yu & Chung (2017) analyzed the phylogeny of the Berberidoideae and proposed a 4-genus classification (Berberis, Mahonia, Alloberberis, and Moranothamnus [not in our region]), which we here follow. "Because of morphological and ecological distinctness of these four clades and their deep stem divergences equivalent to other genera of Berberidaceae, we propose a new classification of Berberis s.l. by applying a strict definition of Berberis (≡ Berberis s.str.), reinstating Mahonia (≡ core Mahonia), and proposing the two new genera Alloberberis nom. & stat. nov. (≡ Mahonia sect. Horridae) and Moranothamnus gen. nov. (≡ B. claireae). This revised classification is consistent with the traditional perception of Berberis and results in a monophyletic Mahonia, maintaining the stable usage of these two household names in both academic and non-academic communities."

Ref: Chen et al. (2020b); Kim, Kim, & Landrum (2004); Loconte In Kubitzki, Rohwer, & Bittrich (1993); Whittemore (1997d) In Flora of North America Editorial Committee (1997); Yu & Chung (2017). Show full citations.

Show in key(s)

Show parent family

Show species in Mahonia

Your browser does not support SVGs

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 | Mahonia repens | Original Image ⭷
image of plant© Alan Cressler: Berberis aquifolium, Church Fork, Wasatch National Forest, Salt Lake County, Utah 2 by Alan Cressler | Mahonia aquifolium source | Original Image ⭷
image of plant© Keith Bradley | Mahonia bealei | Original Image ⭷


See something wrong or missing on about Mahonia? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.)

Cite as...