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Image Title: Male flower of Echinocereus coccineus (Cactaceae) showing pollen-filled anthers
Image Credit: M. Timm Hoffman
AJB Editor: Nels R. Lersten, Iowa State University
Intended End User: Teacher, Student
License Details: BSA - Terms for Image Use
Copyright held by: M. Timm Hoffman, BSA
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About the Image

(Left) functional male flower of Echinocereus coccineus (Cactaceae) showing pollen-filled anthers surrounding the base of the stigma lobes. (Right) Functional felmale flower of E. coccineus from a different plant showing reduced filaments and empty anther sacs held below the stigma lobes.

Link to the AJB Abstract for the article:

Functional dioecy in Echinocereus coccineus (Cactaceae): breeding system, sex ratios, and geographic range of floral dimorphism

National Science Foundation  Development Supported by the National Science Foundation