Figure 1. Examples of bee nests inside perennial plant stems. A. Cocoons of the leafcutting bee Hoplitis in lollipop verbena. B. Nest of the small carpenter bee Ceratina mikmaqi in coneflower. C. Nest of leafcutting bee (Megachile) in Anemonella. D. Nest of the small carpenter bee Ceratina calcarata in Hydrangea.
photographs of bee nests inside four perennial plant stems

Youngsteadt Urban Ecology Lab  CC BY-NC-SA 4.0