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| Derivation of specific name: | californica: of California, USA, where the type specimen was collected. |
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| Worldwide distribution: | Native in western USA and northern Mexico; cultivated and sometimes naturalized elsewhere in the world. |
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| Spot characters: | Display spot characters for this species |
| Literature: |
Fischer, E. (2020). Papaveraceae Flore d'Afrique Centrale Nouvelle Serie Botanic Garden Meise, Belgium Pages 13 - 14. (Includes a picture). Troupin, G. (1978). Papaveraceae Flore du Rwanda Spermatophytes Volume I Pages 307 - 308. |