Flowers open near sunset and wither the following morning. Flowers irregular . Stamens 8, with paired teeth at filament bases. Racemes sometimes branched, drooping at the tips. Petals 3-8 mm long.
Racemes erect .
Petals 6-10 mm long. Racemes slightly drooping at the tips. Petals 7-15 mm long. Differences in fruit characteristics are important for species identification. Fruit lengths given below include the base.