CONSPECIFICITY OF SOME CHAROPHYTES1

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Abstract
Sweets Lake, British Columbia, is the type locality for plants originally described as Chara buckellii. Plants from this locality have been crossed successfully to a 2nd clone from Laguna La Brava, Argentina, the type locality for Nitellopsis bulbillifera. Plants from both clones were also crossed with others from Texas, New Mexico, and Wyoming that agree in most respects with Robinson''s original description of C. longifolia. On the basis of these crosses it is suggested that all 3 taxa are biologically conspecific. There is no evidence, either from the field or experimental crosses, of gene flow between C. longifolia and C. hornemannii; the 2 should be considered separate species.

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