A giant floating fern that carpets waterways with thick, leafy mats has become a major problem in Alabama waterways. It’s called Giant Salvinia. “Nobody wants it,” said Monica Allen, a spokesperson ...

HARTBEESPOORT, South Africa (AP) — Dozens of tiny black weevils cling onto a fern plant as it is tossed onto a leafy green mat coating the surface of South Africa's Crocodile River. Those weevils aren ...

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"The second printing of this book has permitted a few emendations in the keys and correction of some typographical errors, incorrect references, and incorrect names, notably Polystichum lachenense for ...