http://www.biodiversitylibrary.org/
Bulletins de l'Académie royale des sciences, des lettres et
des beaux-arts de Belgique.
Bruxelles.
http://www.biodiversitylibrary.org/bibliography/5550
ser.2:t.49 (1880):
http://www.biodiversitylibrary.org/item/111248 Page(s): Page 460, Page 461, Page 462, Page 463, Page 464, Page 465, Page 466, Page 467, Page 468, Page 469, Page 470Contributed by: Missouri Botanical Garden, Peter H. Raven Library Sponsored by: Missouri Botanical Garden
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