An evergreen sub-shrub forming a mat to 15cm in height, of glossy dark green, coarsely toothed obovate leaves to 7cm in length, with erect spikes of small white flowers in early summer ...
An evergreen, rhizomatous perennial to 25cm tall, forming a wide mat of toothed, glossy green leaves to 10cm long, and stubby spikes of small white flowers in early summer ...