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  A Guide to Species Irises: Their Identification and Cultivation - Google Books

  https://books.google.de/books?id=pL6uPLo7l2gC

  This volume was first published in 1997, providing a comprehensive, botanically detailed survey of this beautiful group of plants since publication of The Genus Iris by W. R. Dykes. Following the pattern of the original Dykes monograph, botanical details,…

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  Amaranthus retroflexus – Wikimedia Commons

  https://commons.wikimedia.org/wiki/Amaranthus_retroflexus?uselang=de

  Keine Beschreibung vorhanden.

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  Ed's Beer Site: The hop and its English varieties by John Percival (1901)

  http://edsbeer.blogspot.de/2012/03/hop-and-its-english-varieties-by-john.html

  Keine Beschreibung vorhanden.

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