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- W2330657834 abstract "In 1935, Katherine Schneider made the first discovery of what she identified as the limestone oak fern, Gymnocarpium robertianum (Hoffm.) Newm., in Blair County, Pennsylvania (Wherry, 1942a). This significant find was not disclosed until 1941, when she and Elsie Canan located a larger colony of plants nearby and arranged to have the site verified by E.T. Wherry. At the time, this finding was regarded as the most remarkable disjunct occurrence of any species for the state of Pennsylvania (Wherry, 1942b); an honor that later when to Montia chamissoi (Ledeb. ex Spreng.) Greene (Wherry, 1964). Nevertheless, the Blair County site still maintained the presumed distinction of being the southernmost locality known for G. robertianum in North America (Ogden, 1981), with the nearest stations being 260 miles to the northwest in St. Clair County, Michigan and 300 miles directly north in Frontenac County, Ontario (Sarvela et al., 1981). The small number of herbarium specimens originating from the Blair County site indicates that it was a well-kept secret indeed, with only a handful of botanists who made collections there (Table 1). Most gave general directions to it as either miles northwest of 3 miles northwest of or 3.5 miles north of Duncansville. Thomas Darling, Jr. visited the site on August 25, 1956, and the specimen that he deposited at the Smithsonian (US) provides the most detailed locality information: among limestone rocks on northwest-facing talus slope near quarry, approximately 2 miles northwest of Hollidaysburg, near point where Burgoon Creek intersects Beaverdam Branch of Juniata River, Blair County. The most recent date of collection is August 10, 1957, when the site was visited by L.K. Henry (Table 1). No herbarium specimens taken from there since that date were located." @default.
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- W2330657834 date "1992-01-01" @default.
- W2330657834 modified "2023-09-27" @default.
- W2330657834 title "The Status of Gymnocarpium heterosporum and G. robertianum in Pennsylvania" @default.
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- W2330657834 doi "https://doi.org/10.2307/1547760" @default.
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