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Our Ferns in Their Haunts; A Guide to All the Native Species
Willard Nelson Clute
No preview available - 2016
abundant America apex appear Aspidium Asplenium Athyrium base beech fern BLADDER FERN blade botanists Botrychium bracken brown called chain fern Cheilanthes Christmas fern cinnamon fern collector colour creeping crosiers Cystopteris divisions Dryopteris erect evergreen fern seed fertile and sterile fertile fronds flowering frequently fronds are produced FRUITING PINNA genera genus grape fern green grow habitat indusia indusium known lady fern lanceolate ledges lobes lower pinnae maidenhair margins marsh fern midrib moist moonwort narrow nearly North northern nules oblong occasionally Onoclea Osmunda ostrich fern ovate Phegopteris pinnatifid pinnules places plant polypody Polystichum rachis rare rattlesnake fern resemblance rocks roots rootstock seldom sensitive fern shade shape SHIELD FERN slender slightly soil sori sori are borne sorus species specific name specimens spleenwort sporangia spores stalked sterile fronds sterile portion stipe surface swamps tips toothed tufts twice pinnate usually variety veins winter wither wood ferns woodland Woodsia York fern