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File:Lilium rosthornii Diels- Bot. Jahrb. Syst. 29- 243 (1900). 20210808 084513.jpg - Wikimedia Commons
Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie. : Free Download, Borrow, and Streaming : Internet Archive
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File:Bulbophyllum macranthoides (Irian Jaya, Indonesia) Kraenzl., Bot. Jahrb. Syst. 34- 254 (1905) (34153964961).jpg - Wikipedia
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File:Lilium rosthornii Diels- Bot. Jahrb. Syst. 29- 243 (1900). 20210808 084701.jpg - Wikimedia Commons
The Type Specimens of African Loranthus Taxa (Loranthaceae) Described by Engler and Kept in the General Herbarium at Berlin-Dahl
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