R. sulphurea, by Mrs. Vicary, figured in The Botanical Register, Vol. 1, tab 46 (1815), courtesy of books.google.com and The Arnold Arboretum of Harvard University.
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R. sulphurea, by Mrs. Vicary, figured in The Botanical Register, Vol. 1, tab 46 (1815), courtesy of books.google.com and The Arnold Arboretum of Harvard University.