Is the eusporangiate or the leptosporangiate the more primitive type in the ferns?
Bower, F. O. (Frederick Orpen), 1855-1948
Article
1891-04
Annals of botany
5
109--134
New York Botanical Garden, LuEsther T. Mertz Library
English
London, Academic Press [etc.],
DOI: https://doi.org/10.1093/oxfordjournals.aob.a090629
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