A New Variety of Choisya arizonica (Rutaceae) from Arizona, U.S.A.

Laurence Toolin

doi:10.3417/2012074

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Laurence Toolin¹

¹University of Arizona Herbarium, Department of Plant Sciences, University of Arizona, Herring Hall, P.O. Box 210036, Tucson, Arizona 85721-0038, U.S.A. ljt@physics.arizona.edu

Abstract

A new variety of the evergreen shrub Choisya arizonica Standl. (Rutaceae) is described. It differs from the typical form in having longer and broader leaflets and thus larger leaves. The new variety C. arizonica var. amplophylla Toolin occurs in a few localities in southeastern Arizona with igneous rock substrates, rather than on soils derived from limestone substrates normally colonized by the species.

Citation Download Citation

Laurence Toolin "A New Variety of Choisya arizonica (Rutaceae) from Arizona, U.S.A.," Novon: A Journal for Botanical Nomenclature 23(1), 113-114, (8 April 2014). https://doi.org/10.3417/2012074

Published: 8 April 2014

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