Chelidonium
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- COSEWIC Assessment and Update Status Report on the Wood-Poppy Stylophorum Diphyllum in Canada. Endangered 2007
- Celandine Poppy
- Papaveraceae (PDF)
- Greater Celandine
- Polen En Papaveraceae De Andalucia Occidental
- An Endemic Genus in Korea, Using DNA Sequences
- Basal Eudicot Seeds and Fruits DQ Fuller 8.2.2006
- Wood-Poppy (Stylophorum Diphyllum) in Canada [Proposed]