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A taxonomic reconsideration of Salix taxifolia sensu lato (Salicaceae)

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Abstract

Salix taxifolia s.1., originally described as two species, has been treated as either a single species, or as two varieties: var.taxifolia and var.microphylla. Morphological, chemical, and phytogeographical evidence supports treatingSalix taxifolia andS. microphylla as species. These taxa are distinguished on the basis of leaf length, leaf length-width ratio, the number of teeth or glands on the leaf margins, the presence or absence of abaxial nectaries in the staminate flowers, the presence or absence of foliar stipules, and by their flavonoid profiles. Their geographical ranges are different and come into contact only in the state of Durango, Mexico. Phenetically, all of the subgroups ofS. taxifolia are more similar to each other than they are toS. microphylla. Both of these taxa are morphologically more similar to each other than they are to other members of sect.Longifoliae. A key to the species and descriptions are provided.

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Authors and Affiliations

  1. Canadian Museum of Nature, K1P 6P4, Ottawa, Ontario, Canada

    George W. Argus & Cheryl L. McJannet

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  1. George W. Argus
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  2. Cheryl L. McJannet
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Argus, G.W., McJannet, C.L. A taxonomic reconsideration of Salix taxifolia sensu lato (Salicaceae). Brittonia 44, 461–474 (1992). https://doi.org/10.2307/2807196

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