Bullace

Bullace (Prunus insititia), a wild variety of P. communis, differing from the blackthorn (q.v.) in having brown bark instead of black, straighter, and less spinous branches, larger leaves which are downy on their under-surfaces, downy flower-stalks and larger flowers and fruit, whilst the latter, though round, is less harsh to the taste. A variety with yellow drupes is sold in London as "white damsons," and though most plums (P. domestica) are altogether free from spines and have oval fruit, there are, in fact, no constant characters to distinguish P. insititia from P. domestica.