Abstract
The key is mainly based on characters of the cxosporium. Pteridium aquilinum has a deciduous exosporium. Divergent descriptions in the earlier literature may be caused by the use of unripe material or by obscurities in the taxonomy. © 1974 Taylor & Francis Group, LLC.
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CITATION STYLE
APA
Moe, D. (1974). Identification key for trilete microspores of fennoscandian pteridophyta. Grana, 14(2–3), 132–142. https://doi.org/10.1080/00173137409429903
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