Stamen Abaxial Side
Centre Block, Cypress Hills Interprovincial Park
Note the anther pores are initially basal, but become apical as the anther rotates 180 degrees during development.
Chimaphila: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus.
Pyrolaceae: Answers to key questions in Budd's Flora leading to this family. Not all the answers lead to all members of Pyrolaceae, but they all do lead to the single member of Chimaphila found in the Canadian prairies. Note that the key requires the plant be a shrub or tree, not a herb. In fact, C. umbellata is suffruticose (woody at the base and herbaceous above).