Figure 1
From: Hybridization and speciation in angiosperms: a role for pollinator shifts?
Allopolyploid species of Nicotiana (Solanaceae) and their parental diploid species. Note that the floral morphology of three of the polyploids, N. repanda, N. nesophila and N. stocktonii (allotetraploids, 2n = 48), is like that of N. sylvestris (a diploid, 2n = 24), adapted for nocturnal hawk-moth pollination, and the fourth, N. nudicaulis, is like that of the other parent, N. obtusifolia (2n = 24), adapted for bee pollination during the day. Photographs taken by Kar Yoong Lim.