P. coriacea is a herbaceous, perennial species. Plants possessstems that range in height from 40–90 cm tall. Stems can be up to 1cm in diameter and can range in colour from green and to purple. Leaves are green and range from 5–15 cm long and 2–8 cm wide. Flowers stand on the top of stems. Each stem can hold a single solitary flower. Flowers are pink in colour and possess yellow anthers.