('alno. Ital.). The alder tree. Betula alnus Lin. Sp. Pl 1394!
Alnus rotundi, folia glutinosa viridis, C. B. The common alder tree, called amendanus.
The black alder is the Rhamnus frangula Lin. Sp. Pi. 280; called also Avnus.
The black or berry-bearing, alder, is a shrub found in the moist woods. The inner yellow bark of the trunk or root has a bitter and styptic taste: given to 3 ij. vomits, purges, and gripes; but joined with aromatics it operates more agreeably; though an infusion, or decoction of it in water, inspissated to an extract, acts yet more mildly. It is said also to be diuretic and anthelmintic; externally, useful in itch and in varices of the anus. The berries of this species of alder are purgative; they are not in use under their own name, but are often substituted for buckthorn berries. The berries of the black alder, however, have a black skin, a blue juice, and two seeds in each; while the buckthorn berries have a green juice, and commonly four seeds. The error is not, however, of much, consequence: the plants belong to the same genus, and the berries do not differ greatly.