Icelandic Birch Polyploids—The Case of a Perfect Fit in Genome Size
Figure 3
Betula from the woodland Bifröst, western Iceland—the plants and their chromosome numbers: (a) and (d) diploid B. nana, 2 = 2 = 28, morphology index 2; (b) and (e) triploid interspecific hybrid, 2 = 3 = 42, morphology index 4; and (c) and (f) tetraploid B. pubescens, 2 = 4 = 56, morphology index 9. The scale bar represents 2 m.
