It’s a fern, of course. This one is quite common in the Southeast, stretching north into the Ohio River Valley and New England and west to eastern Texas. Southern grape-fern, Sceptridium biternatum, ...
Evolution, Vol. 71, No. 2 (FEBRUARY 2017), pp. 215-226 (12 pages) Many organisms spend a significant portion of their life cycle as haploids and as diploids (a haploid–diploid life cycle). However, ...
THIS important book, embodying the results of the author's well-known morphological researches during the last twenty years, may be regarded from two points of view. On the one hand, it forms a most ...
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