Figure 13
![Figure 13](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2148-10-337/MediaObjects/12862_2010_Article_1552_Fig13_HTML.jpg)
O-ha-tsuki leaf of Ginkgo biloba with well developed ovule. Courtesy H Okada (inventory number Herbarium BOZ PVASC15174).
O-ha-tsuki leaf of Ginkgo biloba with well developed ovule. Courtesy H Okada (inventory number Herbarium BOZ PVASC15174).