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Notes Dryopteris ludoviciana and D. x australis New to Arkansas.-Until recently, Arkansas was known to have three species and one hybrid of Dryopteris (Taylor & Demaree, Rhodora 81:503-548, 1979; Taylor, Arkansas ferns and fern allies, 1984), of which only D. marginalis (L.) Gray occurs frequently across the state. D. spinulosa (O. F. Muell.) Watt and D. x Jeedsii Wherry are each known from one locality, while D. celsa (Palmer) Small is known from three localities. Consequently, the discovery in 1984 of a species and a hybrid new to the state constituted significant additions to the fern flora of Arkansas and furnished important phytogeographic data on the distribution of Dryopteris taxa in eastern

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