Zimmer, B.: Adiantum krameri (Pteridaceae), a new species from French Guiana. — Willdenowia 37: 557–562. — ISSN 0511-9618; © 2007 BGBM Berlin-Dahlem. doi:10.3372/wi.37.37215 (available via http://dx.doi.org/)
Adiantum krameri is described as a species new to science and illustrated. It is endemic to French Guiana (NE South America) and clearly differs from A. cordatum, with which it has so far been confused.
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