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New Tropical American Ferns: IV
Vol 18, Page 1, Date 1928
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Fern Ecology of Barro Colorado Island. Panama Canal Zone
Vol 18, Page 6, Date 1928
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Collecting Horsetails along the Way
Vol 18, Page 14, Date 1928
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A Note on Asplenium pinnatifidum Nuttall
Vol 18, Page 21, Date 1928
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Recent Fern Literature
Vol 18, Page 23, Date 1928
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Activities of the British Pteridological Society
Vol 18, Page 27, Date 1928
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One Joyful Afternoon and Its Spoils
Vol 18, Page 29, Date 1928
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Imperfectly Circinate Vernation in Ferns
Vol 18, Page 31, Date 1928
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Some Ferns of Eastern Victoria
Vol 18, Page 32, Date 1928
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William Stout, a Forgotten Student of Ferns
Vol 18, Page 37, Date 1928
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New Tropical American Ferns: V
Vol 18, Page 46, Date 1928
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Tauranga and Karewha Island
Vol 18, Page 51, Date 1928
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Ferns of Monroe and Adjoining Counties, New York
Vol 18, Page 56, Date 1928
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Recent Fern Literature
Vol 18, Page 58, Date 1928
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Ferns at Dripping Spring, Oklahoma
Vol 18, Page 61, Date 1928
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Fluctuation in Equisetum
Vol 18, Page 69, Date 1928
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Ferning out of Season
Vol 18, Page 80, Date 1928
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Ferns of Monroe and Adjoining Counties, New York (Continued)
Vol 18, Page 87, Date 1928
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Recent Fern Literature
Vol 18, Page 94, Date 1928
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The Hardiness of Hardy Ferns
Vol 18, Page 95, Date 1928
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A Report of the Iowa Botrychiums
Vol 18, Page 97, Date 1928
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Rabbits Eat Equisetum praealtum
Vol 18, Page 98, Date 1928
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"Skeletonized" Fronds of Asplenium Filix-femina
Vol 18, Page 100, Date 1928
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Lake Rotoiti
Vol 18, Page 115, Date 1928
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The Habitat and Distribution of the Broad-Leaf Spinulose Ferns
Vol 18, Page 120, Date 1928
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Recent Fern Literature
Vol 18, Page 124, Date 1928
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Under What Conditions Does Dryopteris dilatata Grow?
Vol 18, Page 130, Date 1928