Sepals and petals 4; stamens 6. Anomalous [Cruciferæ], [61]
Sepals and petals 5; stamens 5 or 10.
Ovary and stamens raised on a stalk. [Passifloraceæ], [194]
Ovary sessile. [Saxifragaceæ], [168]
Ovary 2–several-celled.
Flowers irregular.
Anthers opening at the top,
Six or eight and 1-celled; ovary 2-celled, 2-ovuled. [Polygalaceæ], [120]
Ten and 2-celled; ovary 5-celled. [Rhododendron], in [Ericaceæ], [286]
Anthers opening lengthwise.