The native subspecies of Juncus effusus (Juncaceae) in western North America

Peter F. Zika

doi:10.1663/0007-196X(2003)055[0150:TNSOJE]2.0.CO;2

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Peter F. Zika¹

¹Herbarium, Department of Botany, Box 355325, University of Washington, Seattle, WA 98195-5325, U.S.A.; zikap@aol.com

Abstract

Juncus effusus s. str. has two native representatives on the coast of western North America. A new combination is provided for Juncus effusus subsp. pacificus, ranging from California to British Columbia. Juncus effusus subsp. austrocalifornicus is newly described from southernmost California, Arizona, and Baja California, México. It differs from subsp. pacificus by its pale sheaths, with less thickened and less overlapping margins, and its disjunct distribution. A key is provided for the subspecies of J. effusus in North America.

Citation Download Citation

Peter F. Zika "The native subspecies of Juncus effusus (Juncaceae) in western North America," Brittonia 55(2), 150-156, (1 April 2003). https://doi.org/10.1663/0007-196X(2003)055[0150:TNSOJE]2.0.CO;2

Published: 1 April 2003