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Betulaceae S.F. Gray. Birch Family.

Key to Betulaceae

A family of 6 genera and about 150 species, primarily of subarctic to cold temperate regions of the Northern Hemisphere, but extending through Central America to n. South America. The two subfamilies recognized here are sometimes elevated to family status (Betulaceae s.s., including Betula and Alnus, and Corylaceae, including Corylus, Carpinus, and Ostrya in our region), as by Govaerts & Frodin (1998), an approach which is certainly defensible based on morphological and phylogenetic evidence (Yang et al. 2019).

Ref: Furlow (1990); Furlow (1997) In Flora of North America Editorial Committee (1997); Govaerts & Frodin (1998); Hardin (1971a); Kubitzki, Rohwer, & Bittrich (1993); Yang et al. (2019). Show full citations.

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Show genera in Betulaceae

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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© Richard & Teresa Ware | Alnus CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Richard & Teresa Ware | Corylus cornuta var. cornuta CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Richard & Teresa Ware | Alnus CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Keith Bradley | Alnus | Original Image ⭷
image of plant© Alan Cressler: alnus serrulata, tribble mill county park, gwinnett county, georgia 3 by Alan Cressler | Alnus source | Original Image ⭷
image of plant© Richard & Teresa Ware | Alnus CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Keith Bradley | Betula | Original Image ⭷
image of plant© Keith Bradley | Ostrya | Original Image ⭷
image of plant© Gary P. Fleming | Betula | Original Image ⭷
image of plant© Alan Weakley | Carpinus source | Original Image ⭷
image of plant© Gary P. Fleming | Betula | Original Image ⭷
image of plant© Gary P. Fleming | Betula | Original Image ⭷
image of plant© Erik Danielson | Corylus cornuta var. cornuta source | Original Image ⭷
image of plant© Richard & Teresa Ware | Ostrya CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Richard & Teresa Ware | Ostrya CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Keith Bradley | Ostrya | Original Image ⭷

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