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Pteris ×caridadiae, a new hybrid fern from Costa Rica, is described and its relationships to its parents and other Pteris species are discussed. This is the first hybrid reported among a taxonomically complicated group of large, tripartite-leaved neotropical Pteris species.
Here we evaluate the origins and relationships of Mexican and Central American Diplazium hybrids derived from crosses involving either D. plantaginifolium or D. ternatum. Based on study of live plants and herbarium specimens, we distinguish D. ×verapax from the similar D. riedelianum and present evidence that the former is a sterile hybrid derived from a… (More)