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  Abstract 4043 from Intl. Bot. Congress 1999

  http://www1.biologie.uni-hamburg.de/b-online/ibc99/ibc/abstracts/listen/abstracts/4043.html

  Keine Beschreibung vorhanden.

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  Flora of North America: North of Mexico Volume 22: Magnoliophyta ... - Google Books

  https://books.google.de/books?id=gJr4UGizRxAC

  To be published in 14 volumes over the next 12 years, this long-awaited synoptic compendium represents the first and only comprehensive taxonomic guide to the extraordinary diversity of plant life blanketing our continent north of Mexico--including…

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