Alwin Berger (1871-1931)

He was the author of several books devoted either to succulents or to cacti.

No copyright (public domain)

Published in 1915, this is an interesting contribution with 48 B&W pictures

• Original file: can be downloaded from the Frankfurt University library¹⁾. “Dokument1” is a heavy high definition file whereas “Dokument3” is a lighter version (low definition); “Dokument2” is a sample.
• Interpreted file: Not still available.

Right: Agave latissima (Extracted from the pdf of the link above)

No copyright (public domain)

Published in 1905, In the Annual Report of the Missouri Botanical Garden. He proposed to split the Cereus genus of Schumann as defined 5 years before into several subgenera that were then recognized (or resurected) as genera By Britton and Rose 15 years later.

• A pdf file containing both the original and interpreted text (p. 57-86) can be downloaded as 31753003450266.pdf file²⁾, which is hosted by the Missouri Botanical Garden Library. Visit this library to find more books and to know their copyright rules (clik the “copyright” tab)

Right: Alwin Berger. Kakteen von A bis Z, Walther Haage, Neumann, 1983.

No copyright (public domain)

Published in 1929, this is an exhaustive contribution (334 pages, 104 B&W pictures) of an unsufficiently known author who had a broad scientific. knowledge

• Image file: Berger_Kakteen_O.pdf (99.3MB; 2006-12-31)
• Interpreted file: Berger_Kakteen.pdf (17.3MB; 2007-12-31)

Right: Ariocarpus trigonus (p. 333)