Descr. In our Botanic Garden, this Whitethorn forms 
a large shrub, 1 might almost say a tree, from its being 
eighteen to twenty feet high, with numerous more or less 
spreading branches, clothed with a small, dark purplish- 
brown, glossy bark, and here and there bearing rather long 
and straight but strong thorns, chiefly on the older branches. 
Leaves, on slender, glandular petioles, which are about an 
inch and a half long, broadly ovate, approaching to cor- 
date, quite glabrous, membranaceous, with many acute 
lobes, and finely and sharply serrated: the nerves oblique, 
parallel, reaching to the end of each lobe. Corymbs com- 
pound, terminal on the numerous, short, lateral branches, 
of several large, white flowers. Calyx of five spreading, 
subulate segments, glandular at their margins, the glands 
stipitate. Corolla of five, very concave, somewhat crisped 
and nearly orbicular petals. Stamens generally ten, about 
as long as the petals. Anthers oval-oblong, at first deep 
pink, afterwards greenish. Germen oblong-turbinate, 
smooth and quite glabrous in our specimens. Styles five. 
Stigmas capitate. 
