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  Flowering Plants. Monocotyledons: Lilianae (except Orchidaceae) - Google Books

  https://books.google.de/books?id=FyPVYzL76sMC

  When Rolf Dahlgren and I embarked on preparing this book series, Rolf took prime responsibility for monocotyledons, which had interested him for a long time. After finishing his comparative study and family classification of the mono cots, he devoted much…

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  Angiosperm families - Oleaceae Hoffmgg. & Link

  http://www.delta-intkey.com/angio/www/oleaceae.htm

  Description of Oleaceae Hoffmgg. & Link, generated from a DELTA database.

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  Angiosperm families - Leguminosae-Caesalpinioideae Kunth

  http://www.delta-intkey.com/angio/www/caesalpi.htm

  Description of Leguminosae-Caesalpinioideae Kunth, generated from a DELTA database.

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