Buckthorn

Definition and stakes

W. S. Coleman,  British Butterflies: Figures and Descriptions of Every Native Species

“ Many a young botanist would be puzzled at first sight to tell a sloe-bush from a buckthorn-bush. Not so, however, with our Brimstone butterfly: passing by all the juicy hedge-plants, which look quite as suitable, one would think, she, with botanical acumen, fixes upon the buckthorn; either the common one, or, if that is not at hand, upon another species of rhamnus—the berry-bearing alder—which, though a very different looking plant, is of the same genus, and shares the same properties. ”
Source: Gutenberg

Edward Step,  Wayside and Woodland Trees: A pocket guide to the British sylva

“ Our two native species of Buckthorn are shrubs of from five to ten feet in height. In this one respect they agree; in almost all others they differ. Both are Buckthorns in name, but the Breaking Buckthorn (Rhamnus frangula) is quite unarmed, whilst many of the branchlets of the Purging Buckthorn (Rhamnus catharticus) are hardened into spines. ”
Source: Gutenberg

Edward Step,  Wayside and Woodland Blossoms

“ Sea Buckthorn is the sole representative in this country of the Natural Order Elæagnaceæ, and is a low shrubby tree, growing on sand-hills and cliffs on the East and South-east coasts from York to Sussex. The branches commonly end in a spine, which has brought the plant its alternative name of Sallow-thorn. The alternate leaves are a dull leaden green above, but the underside is covered with silvery scales. ”
Source: Gutenberg

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