Sweet pea shrub

Other common names
sweet pea shrub

Family
Polygalaceae

Genus
Polygala can be annuals, evergreen perennials or shrubs, with simple leaves and racemes of somewhat pea-shaped flowers.

Details
P. x dalmaisiana is a bushy evergreen shrub to 1.5m, with dark green, ovate leaves and terminal racemes of pea-like, reddish-purple flowers 2.5cm long, in summer and autumn.

https://www.rhs.org.uk/Plants/56000/Polygala-x-dalmaisiana/Details