Notizbl. Bot. Gart. Berlin-Dahlem 12: 156 (1934)
[Notizblatt des Botanischen Gartens und Museums zu Berlin-Dahlem]
Illustrations originally published under Hexopetion Burret :
[Notizblatt des Botanischen Gartens und Museums zu Berlin-Dahlem]
Illustrations originally published under Hexopetion Burret :
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