Entry for Atriplex gardneri (Moquin-Tandon) D. Dietrich [family CHENOPODIACEAE]
Entry From
Flora of North America, Vol 4,
Names
Atriplex gardneri (Moquin-Tandon) D. Dietrich [family CHENOPODIACEAE], Syn. Pl., 5: 537. 1852
Obione gardneri Moquin-Tandon [family CHENOPODIACEAE], in A. P. de Candolle and A. L. P. P. de Candolle, Prodr., 13(2): 114. 1849
Atriplex nuttallii S. Watson subsp. gardneri (Moquin-Tandon) H. M. Hall & Clements [family CHENOPODIACEAE]
Atriplex nuttallii var. gardneri (Moquin-Tandon) R. J. Davis [family CHENOPODIACEAE]
Discussion
This is a widely distributed complex of intergrading genotypes of great phenotypic plasticity. The members occur commonly in fine-textured saline substrates in much of the western Great Plains and in the Intermountain Region. Diploids, triploids, tetraploids, and hexaploids (and higher polyploids, all multiples of the base number 9) are known within the complex, and hybrids are known not only between the constituents but with the other woody species which they contact, i.e., Atriplex canescens, A. confertifolia, and A. corrugata. Indeed, a case can be made for treating both A. gardneri and A. canescens within an expanded A. canescens. They are regarded here as forming two intergrading complexes, with some of the constituent varieties placed equally well within either of the species aggregations. The treatment essentially follows the alignment of taxa suggested by C. A. Hanson (1962), with the exception that they are reduced to varietal status and var. bonnevillensis and var. aptera are placed within the A. gardneri phase and not with A. canescens.