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Pairs of Closely related Species with the Same Chromosomal Numbers Differing in Morphology and Ecological Preferences
species, preference (occurrence)
chromosomal number (n)
Geum urbanum: dry habitats Geum rivale: moist habitats
21
Primula vulgaris: shadowy places Primula veris: sunny places
11
Silene maritima: coast Silene vulgaris: inland
12
Silene alba Silene dioica
12
Quercus robur: heavy soils Quercus petraea: light soils
12
Epilobium hirsutum Epilobium parviflora
18
Viola odorata Viola hirta
10
According to D. H. VALENTINE, 1951



© Peter v. Sengbusch - b-online@botanik.uni-hamburg.de