610201 Betula pendula Roth
- Roth, Tent. Fl. Germ. 1: 405 (1788). Described from Europe.
- Betula verrucosa Ehrh., Beitr. Naturk. 5: 161 (1790); 6: 98 (1791). Internal note: Type information lacking.
2n=
(1) 28 (2x). - Europe. - Numerous reports.
(2) 42 (3x). - Europe (Fennoscandia). - Jonsell (2000c, secondary report from three provinces).
All chromosome count reports from Fennoscandia refer to the southern var. pendula (Jonsell 2000c). The triploids recorded from Scandinavia may be due to hybridization between diploid B. pendula and tetraploid B. pubescens. Such hybrids are frequent (e.g., Jonsell 2000c; Elven et al. 2005).
Geography: European - Asian (W).
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Source: Quadell at Wikispecies
