Search The Directory The Web for Home > Science > Biology > Flora and Fauna > Plantae > Polypodiophyta New! Submit a site   Categories: Marratiopsida (7) Polypodiopsida (458) Marsileopsida (6) Salviniopsida (15) Ophioglossopsida (6)       whatUseek Collection Sites (submit a site ):   Give your site great placement in this category in as little as two business days!     whatUseek Directory Site Listings:   Introduction to the Ferns - The ferns are an ancient lineage of plants, dating back to at least the Devonian. They include three living groups - Marattiales, Ophioglossales, and leptosporangiate ferns - as well as a couple of extinct groups.   Natural Perspective - Ferns and Allies. Help build the largest human-edited directory on the web.   Submit a Site - Open Directory Project - Become an Editor

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