Calyx valvate in the bud, and
Persistent; stamens monadelphous; anthers 1-celled. [Malvaceæ], [96]
Deciduous; anthers 2-celled. [Tiliaceæ], [101]
Calyx imbricated in the bud, persistent.
Shrubs; stamens on the base of the petals. [Ternstrœmiaceæ], [95]
Aquatic or marsh herbs; ovaries many,
On 5 placentæ in the axis. [Sarraceniaceæ], [57]
On the 8–30 partitions. [Nymphæaceæ], [54]
2. Calyx more or less coherent with the surface of the (compound) ovary.
Ovary 8–30-celled; ovules many, on the partitions; aquatic. [Nymphæaceæ], [54]