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Journal article
Wilson's Poliothyrsis.
Baldwin, Harry
United States, Arboreta, Poliothyrsis, Plant collections, and China
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Journal article
Rooting for orchid collections.
Hermans, Clare ; Hermans, Johan
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Book chapter
Foreword.
Fay, M. F.
Botanic gardens, Plant collections, Orchidaceae, Orchid collections, Ex situ collections, and Orchids