Discovery of a Possibly Relict Outbreeding Morphotype of Sparrow's-egg Lady's-slipper Orchid, Cypripedium passerinum, in Southwestern Yukon

Paul M. Catling, Bruce A. Bennett

Abstract


An outbreeding morphotype of Cypripedium passerinum with separate anthers and stigma was discovered in the Beringian region of southwestern Yukon. The occurrence of this breeding system in Beringia is attributed to the persistent advantage of outbreeding over hundreds of thousands of years in this unglaciated area, whereas the widespread occurrence of exclusively self-pollinating races elsewhere in Canada is attributed to advantages in colonization of recently deglaciated territory which first became available less than 10,000 years ago, and/or to a changing and more forested habitat.

Keywords


Sparrow's-egg Lady's-slipper Orchid; Cypripedium passerinum; Orchidaceae; autogamy; self-pollination; unglaciated; Beringia; Kluane; Yukon

Full Text:

PDF


DOI: http://dx.doi.org/10.22621/cfn.v121i3.477



Volumes that are more than six years old are freely available courtesy of the Biodiversity Heritage Library.

 


Questions or problems with the website? Contact William Halliday (info -at- canadianfieldnaturalist -dot- ca).