(Q56249661)
Statements
The Genus Riella, with Descriptions of New Species from North America and the Canary Islands (English)
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April 1903Gregorian
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The Genus Riella (Howe & Underwood 1903)
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Bulletin of the Torrey Botanical Club, 30 (4): 214–224; Plates 11, 12. (1903)