Functional Diversity of Nectary Structure and Nectar Composition in the Genus Fritillaria (Liliaceae)

Fritillaria is a genus of 130 to140 species of bulbous plants, native to temperate regions of the Northern Hemisphere. Generally viewed as an insect pollinated genus with the exception of two North America species, F. gentneri and F. recurva, which are described as hummingbird-pollinated and the Asian species, F. imperialis, described as passerine-pollinated. These pollinating shifts are possibly the result of adaptive changes to the structure...