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By: Friesner, Ray CType: ArticleIn: American journal of botanyVolume: 7Series:Issue: 9Date: 1920-11Page Range: 380--407Publication Info: Lancaster, Pa, Published in cooperation with the Botanical Society of America by the Brooklyn Botanic Gardens, 1914-Subjects:
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By: Friesner, Ray CType: ArticleIn: Botanical gazetteVolume: 66Series:Issue: 4Date: 1918Page Range: 383--385Publication Info: Hanover, Ind, [publisher not identified], 1876-1991Subjects: