Hypericum monogynum (Cultivated)

 
(Cultivated in gardens of India; Native of China) as per BSI Flora of India (1993);
 
Hypericum monogynum [Miller, Gard. Dict., ed. 7. No. 11. 1759.
Cultivated shrub with spreading branches; leaves sessile or with up to 2 mm long petiole, elliptic oblong, up to 5 cm long; flowers 3-5 cm across; petals obovate, 2-3 cm long; stamens in 5 bundles; styles 5, united, 3-5 times as long a ovary; capsule 6-10 mm long
Photographed from California