Style, if any, and stigma only one; leaves simple; no scarious bracts around the flowers. [Urticaceæ], [461]
Styles 3; embryo straight; flowers involucrate. [Eriogonum], in [Polygonaceæ], [436]
Style or stigmas 2 or 3; embryo coiled or curved.
Stipules not scarious, leaves palmately cleft or palmately compound. Cannabineæ, in [Urticaceæ], [461]
Stipules scarious (or none); leaves opposite. [Illecebraceæ], [426]
Stipules none; but flowers with scarious bracts. [Amarantaceæ], [427]
Stipules and scarious bracts none. [Chenopodiaceæ], [430]
Shrubs or trees.
Ovules a pair in each cell of the ovary.
Fruit 2-celled, a double samara. Acerineæ, in [Sapindaceæ], [115]