Most species have solitary flowers in the leaf axils. The buds are enfolded in a pair of bracteoles which usually fall away as the flower blooms. Most plants have five-parted flowers. Six-parted flowers may occur, and four parted, late-opening flowers may be produced when a plant is stressed. Layers of petals unfold in an opening bud, leaving the inner ones crinkled. "A. arbuscula" has the smallest petals, each about half a millimetre long. The petals of "A. granitica" are among the largest, each about 6 millimetres long. Each species generally has flowers either in shades of white to pale pink, or shades of pale to medium pink. Some individuals of "A. arbuscula" have deep pink flowers. Some plants have just a few stamens per flower, while others have up to 60. This varies across species, but also within species and even among flowers on one individual. A few species also have staminodes. The style elongates as the flower matures, and the tip is a dark red colour while the base is paler.