First report of Utah fragile fern (Cystopteris: Cystopteridaceae) from New Mexico, and new nomenclatural combinations in Cystopteris tenneseensis

Autor:	Michael D. Windham, Kathleen M. Pryer
Rok vydání:	2022
Předmět:	Plant Science Ecology Evolution Behavior and Systematics
Zdroj:	Journal of the Botanical Research Institute of Texas. 16:1-7
ISSN:	2644-1608 1934-5259
Popis:	Two recently analyzed collections of Cystopteris from New Mexico represent the first records of Utah fragile fern for the state. Our morphological reexamination of this taxon reveals a single character (the thickness of lateral cell walls in rhizome and petiole base scales) that consistently distinguishes it from tetraploid Cystopteris tennesseensis. Therefore, we propose the new combination C. tennesseensis subsp. utahensis to accommodate these disjunct, tetraploid populations of the southwestern United States. A second new combination, C. tennesseensis subsp. laurentiana, is provided for morphologically similar hexaploids from the northeastern U.S. and southern Canada.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2f817f195588ddc7dc1a905f885bdf82 https://doi.org/10.17348/jbrit.v16.i1.1215 Zobrazit plný text záznamu Plný text ve formátu PDF