Figure 5
From: The Japanese knotweed invasion viewed as a vast unintentional hybridisation experiment
Illustrations of the hybrid plants showing morphological features of flowers and growing points that are most indicative of hybridity. (1) Putative hybrid between F. japonica and Muehlenbeckia australis showing development of axillary shoot and roots at the apex of the stem. (2) Flowers of F. sachalinensis x F. baldschuanica (2n=32). Note the broad wings on the tepals of buds and flowers, which is a F. baldschuanica character. (3) Flowers of F. x conollyana (2n=32), again showing the broad wings characteristic of F. baldschuanica. (4) Male flowers of putative F. japonica x M. australis (2n=54), which are morphologically much more like those of F. japonica, with little winging of the tepals in buds and flowers.
