P. antidysentericum is an usual plant that in its native habitat looses its leaves during the Summer months and then after flowering in Autumn produces new growth, although in cultivation this may not occur. The name antidysentericum is derived from the medicinal word antidysenteric meaning to relieve or to prevent dysentery, It has a very large tuber partly underground which grows to about 1m with short branches and rounded toothed leaves. The flowers are pinkish purple to white in colour with darker markings on the petals.
The P. praemorsum is similar to P. antidysentericum but doesn’t have a tuber and has more showy cream to pink or purple flowers and deeper veins which has the appearance of a butterfly.
The name praemorsum means “bitten off” because of the unsharp edges around the leaflets which are rounded and wedge shaped. It grows to about 30cm in height and was first grown in Europe in the 1800s by seed which was originally collected by Mr Quarrell for the Colvills nursery