Dasylirion longissimum - Leaning Pine Arboretum - DSC05570.jpg
Dasylirion longissimum - Jardin d'oiseaux tropicaux - DSC04880.JPG
Taxonomy database of the U.S. National Center for Biotechnology Information
Global Biodiversity Information Facility
World Checklist of Selected Plant Families
Open Tree of Life reference taxonomy version 3.2
Sukkulenten-Lexikon. Einkeimblättrige Pflanzen (Monocotyledonen)
Illustrated Handbook of Succulent Plants: Monocotyledons
A dataset on catalogue of alien plants in China