Figure 21.30: Eudicots (A) Eudicots include many trees, such as this crabapple tree. (B) Scarlet Banksia is a species of an Australian genus of eudicots that attracts a wide diversity of pollinators by producing large quantities of nectar. (C) The largest flower in the world is Rafflesia arnol-dii, found in the rainforests of Indonesia. This plant is a root parasite of tropical vines and has lost its leaf, stem, and even root structures. The flower is the only part of the plant that can be easily seen. (D) Cacti comprise a large group of eudicots, with about 1,500 species in the Americas. Many bear large flowers for a brief period of each year.