Fig. 2
From: Duplication and expression patterns of CYCLOIDEA-like genes in Campanulaceae
Lobelioideae flowers. A Lobelia erinus flower, B L. erinus floral buds in different stages. C Lobelia polyphylla large flower bud at the late development stage with removed bract. Asterisk marks location of latex exuding from removal of abaxial bract. Lobelioideae have resupinate flowers with the entire bud turning 180-degrees during development, resulting in the adaxial floral meristem region being the ventral region, and the abaxial floral meristem region being the dorsal region when the flower is mature. During floral bud growth, pedicels turn around at a relatively early stage of bud development and are completely turned 180-degrees upside-down by later stages of bud development. White dots show the location of the twist in the pedicels. Photos taken by Jingjing Tong