Ovary 2–several-celled.

Anthers opening by pores at the apex; style 1. [Melastomaceæ], [183]

Anthers not opening by pores.

Stamens on a flat disk which covers the ovary. [Celastraceæ], [109]

Stamens inserted on the calyx.

Eight or four (rarely five); style 1. [Onagraceæ], [186]

Five or ten; styles 2–3, distinct. [Saxifragaceæ], [168]

Ovules and seeds only one in each cell.

Stamens 10 or 5 (instead of many),— rarely in [Cratægus], in [Rosaceæ], [165]

Stamens 2 or 8; style 1; stigma 2–4-lobed; herbs. [Onagraceæ], [186]