• Adler (1994), S.898ff
• Binz (1986), S.510
• CCDB - Link (5.3.2023)
• Flora Gallica (2014), S.75
• Flora Helvetica (2012), Nr.2476
• Flora Italiana - Link (4.3.2023)
• Flora of North America - Link (4.3.2003)
• Hess (1976ff), Bd. 1, S.562
• info flora - Link (4.3.2023)
• Oberdorfer (2001), Nr.210
• Pignatti (1982), Vol.3, Nr.4654
• Rothmaler (2021), S.180
• Tela Botanica - Link (4.3.2023)
• World Flora Online - Link (4.3.2023)

Foto von Stefan Lefnaer. Eigenes Werk, CC BY 2.5, Wikimedia Commons