| Caltha L. | |
| Publ. & Syn. | Thacla Spach, Hist. Nat. Vég. 7: 295 (1838). |
| Notes | Deyl and Soják (1970) accepted the genus Thacla. In a phylogenetic study, Schuettpelz and Hoot (2004) found its type species - Caltha natans (= Thacla natans) - to nest together with the northern and southern hemisphere main branches of Caltha. In view of the appreciable variation in Caltha, especially in the southern hemisphere, we do not recognize Thacla. |
| Chromosomes | (1) 24 (2x?). - Europe, Canada, U.S.A.? - Several reports. (2) 48 (4x?). - Europe (Poland). - Skalinska et al. (1978). Not included: A report of 2n = 38 from southern Asia (Bir and Sidhu 1978). |
| Geography | Cosmopolitan: RUS SIB RFE ALA? CAN. |
| Parent taxon | Ranunculaceae |
| Child taxa |
Caltha natans Pall. ex Georgi Caltha palustris L. |
| PAF ID | 3601 |