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A New Prairie Moonwort (Botrychium Subgenus Botrychium) from Northwestern Minnesota
Vol 81, Page 1, Date 1991
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New Species of North American Cystopteris and Polypodium, with Comments on Their Reticulate Relationships
Vol 81, Page 7, Date 1991
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Notes on Neotropical Hymenophyllaceae
Vol 81, Page 24, Date 1991
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An "Intergeneric" Hybrid: Aglaomorpha X Drynaria
Vol 81, Page 37, Date 1991
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Epidermal Morphology of the Pinnae of Angiopteris, Danaea, and Marattia
Vol 81, Page 44, Date 1991
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Observations on the Understory Climbing Fern, Polybotrya pubens (Dryopteridaceae) in a Peruvian Rain Forest
Vol 81, Page 63, Date 1991
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Vittaria appalachiana: A Name for the "Appalachian Gametophyte"
Vol 81, Page 69, Date 1991
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Developmental Biology of Fern Gametophytes
Vol 81, Page 75, Date 1991
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Lellingeria, a New Genus of Grammitidaceae
Vol 81, Page 76, Date 1991
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A Goniophlebium (Polypodium) Hybrid
Vol 81, Page 89, Date 1991
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An Experimental Study on the Effects of Earthworms on the Ecological Success of Fern Gametophytes
Vol 81, Page 95, Date 1991
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Common and Confusing Bipinnate-Dimidiate Adiantums of Tropical America
Vol 81, Page 99, Date 1991
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Spores of the Pteridophyta
Vol 81, Page 108, Date 1991
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A New Hymenophyllum Species in the Appalachians Represented by Independent Gametophyte Colonies
Vol 81, Page 109, Date 1991
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Stipular Bud Development in Danaea wendlandii (Marattiaceae)
Vol 81, Page 119, Date 1991
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High Resolution Scanning Electron Microscopy of Fern Gametophytes: Applications of a Non-Destructive Method
Vol 81, Page 128, Date 1991
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Allelopathic Effects of Osmunda cinnamomea on Three Species of Dryopteris
Vol 81, Page 134, Date 1991
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The Identity of Polypodium subscabrum Klotzsch
Vol 81, Page 139, Date 1991
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Pteridophyta of Peru, Part IV, 17. Dryopteridaceae
Vol 81, Page 141, Date 1991