Flower colour polymorphism in cirsium palustre 2. Pollination

Abstract

The white flowered morph of Cirsium palustre (L.) Scop, is subject to preferential pollination. Since the polymorphism is localised in regions which are likely to possess a low pollinator activity it is suggested that the polymorphism may be an adaptive response to conditions of low pollination. © 1974 The Genetical Society of Great Britain.