Fig. 2: Possible influence of academic tradition in reporting plant hybrid zones.
From: The puzzle of plant hybridisation: a high propensity to hybridise but few hybrid zones reported
Percentage of hybrid zones (dark grey) from four countries with respect to the total number recorded in Abbott (2017) compared with the estimated number of vascular plants in each of them (light grey). From left to right, Japan, United States, Australia, China.
