Club-Moss, or Lycopodium, L. a native genus of plants, comprising six species, the principal of which are - 1. The clavatum, or common club-moss, which grows in dry mountainous places, heaths, and woods. It is principally found in the north of England ; produces a prostrate creeping stem, from one to three yards in length: flowers from July to August, and bears seeds, which, if infused in ropy wine, will, in a few days, restore it. When thrown into a tire, these seeds emit a bright flash, and also possess the peculiar property of being almost impervious to moisture, so that if they are scattered on a bason of water, the hand may be immersed to the bottom, without being wetted. - In the north of Europe they are pulverized, and applied externally for curing chaps in the skin and other sores. Beautiful mats, or summer carpets, are manufactured of the stalks of this plant, in Sweden.

2. The selago, or fir-leaved club-moss, which is very common on the mountainous heaths in the Highlands of Scotland, the Hebrides, and in the northern parts of England. This plant rises from two to five inches in height, and is in bloom from April to October. In the island of Raasay, in Ross-shire, and likewise in some other places, the inhabitants employ it as a substitute for alum, to fix the colour in dyeing. The Swedes make a decoction of it, and apply it to hogs and cattle, for the destruction of vermin. The Highlanders also occasionally take an infusion of it, as an emetic and cathartic, but it operates violently ; and unless taken in a small dose, causes giddiness and convulsions.