Article (magazine).

Barbara Ertter explains why the name Rosa bridgesii Crépin ex Rydberg should be "conserved" (a technical term meaning allowed as an exception to the rules of taxonomic nomenclature) for a "relatively well-defined dwarf rose characteristic of mid-montane forests of the western Sierra Nevada and Cascade Range of California and southern Oregon" to which many different names have been given by botanists.

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Article (magazine) published 2016.

The relationships of Rosa gymnocarpa Nutt. in connection with historical sect. Gymnocarpae Crép. and recent publications on Rosa phylogeny are discussed, noting the relative isolation of the species within the genus. All synonyms and segregate taxa are addressed; a lectotype is designated for the species and other names as needed. Two subspecies are recognized: subsp. gymnocarpa, primarily west of the Cascade-Sierra axis, and subsp. helleri (Greene) Ertter & W. H. Lewis, occurring from southeastern British Columbia and northwestern Montana to the northern Sierra Nevada in California. Subspecies gymnocarpa is further divided into var. gymnocarpa and var. serpentina Ertter & W. H. Lewis. A key, range descriptions, and representative specimens are provided for infraspecific taxa. Extensive zones of intergradation occur where the ranges intersect, especially in the Klamath and Siskiyou ranges of northeastern California and adjacent Oregon; intermediates are also common in northern Idaho and adjacent states and provinces. Presumed hybrids with sympatric species are discussed, including some across ploidy levels. Nothospecies R. ×henryana W. H. Lewis is described for the hybrid of R. gymnocarpa and R. nutkana C. Presl; R. ×collaris Rydb. (pro sp.) is transferred to nothospecies status as the hybrid of R. gymnocarpa and R. woodsii Lindl.

Article (magazine) published 10 Sep 2007.

Three subspecies of Rosa nutkana C. Presl and five of R. woodsii Lindley are recognized in western Canada and the United States, including four changes in combination and/or status: Rosa nutkana subsp. melina (Greene) W. H. Lewis & Ertter, R. woodsii subsp. arizonica (Rydberg) W. H. Lewis & Ertter, R. woodsii subsp. manca (Greene) W. H. Lewis & Ertter, and R. woodsii subsp. gratissima (Greene) W. H. Lewis & Ertter. Rosa nutkana subsp. melina and R. woodsii subsp. manca occur at high elevations of the southern Rocky Mountains and Colorado Plateau of Colorado and Utah with outlying populations in Arizona, Idaho, New Mexico, and Wyoming; R. woodsii subsp. arizonica is found at lower elevations of Arizona and the Colorado Plateau; and R. woodsii subsp. gratissima occurs in the mountains surrounding the Mojave Desert and southern Great Basin of California and Nevada, with its variety glabrata (Parish) D. Cole confined to the San Bernardino Mountains of California. Synonyms are provided for appropriate subspecies, 14 lectotypes and one neotype are designated here, and selected exsiccatae are given for newly recognized subspecies. The following names are lectotypified: Rosa bakeri Rydberg, nom. illeg., R. californica Chamisso & Schlechtendal var. ultramontana S. Watson, R. deserta Lunell, R. fendleri Crépin, R. macounii Greene, R. maximiliani Nees, R. megalantha G. N. Jones, R. neomexicana Cockerell, R. nutkana var. alta Suksdorf, R. nutkana var. hispida Fernald, R. nutkana var. pallida Suksdorf, R. rainierensis G. N. Jones, R. spaldingii Crépin ex Rydberg, and R. subnuda Lunell. One neotype is designated: Rosa woodsii Lindley.
 

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