Abstract:Field and herbarium study of Luzula comosa and its allies revealed two taxa in western North America that were overlooked in recent years but are distinct and best treated as species. Luzula cascadensis, once considered a variety of Luzula campestris, is elevated to species rank. It inhabits montane wetlands from southern Washington to California, east to Idaho and Montana. It is distinguished from Luzula comosa by its elongate horizontal rhizomes, usually darker tepals, and wetter habitats. Luzula macrantha i… Show more
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