This, and the wild Basil, belong to the Labiate order of plants. The leaves of the Sweet Basil, when slightly bruised, exhale a delightful odour; they gave the distinctive flavour to the original Fetter-Lane sausages. The Wild Basil (_Calamintha clinopodium_) or Basil thyme, or Horse thyme, is a hairy plant growing in bushy places, also about hedges and roadsides, and bearing whorls of purple flowers with a strong odour of cloves. The term _Clinopodium_ signifies "bed's-foot flower," because "the branches dooe resemble the foot of a bed." In common with the other labiates, Basil, both the wild and the sweet, furnishes an aromatic volatile camphoraceous oil. On this account it is much employed in France for flavouring soups (especially mock turtle) and [46] sauces; and the dry leaves, in the form of snuff, are used for relieving nervous headaches. A tea, made by pouring boiling water on the garden basil, when green, gently but effectually helps on the retarded monthly flow with women. The Bush Basil is _Ocymum minimum_, of which the leafy tops are used for seasoning, and in salads. The Sweet Basil has been immortalised by Keats in his tender, pathetic poem of _Isabella and the Pot of Basil_, founded on a story from Boccaccio. She reverently possessed herself of the decapitated head of her lover, Lorenzo, who had been treacherously slain:-- "She wrapped it up, and for its tomb did choose A garden pot, wherein she laid it by, And covered it with mould, and o'er it set Sweet Basil, which her tears kept ever wet."