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I have frequently found that the grace and lightness of the Fumitory suggest to the non-botanical mind some kind of relationship with the Maidenhair-fern; more especially is this the case with the lower portion of the plant. The leaves are thin and much divided. The flowers are peculiarly formed, and their arrangement is known as a raceme. Each consists of a couple of small sepals, and four petals arranged in two unequal pairs; the upper petal is spurred at the base, the lateral pair connected by their tips and completely enclosing the stamens and pistil.

The plant is common in dry fields and waste places throughout the three kingdoms, and indeed over a great part of the earth, for it is a plant that has followed close in the wake of cultivation. The name is an ancient one, derived from the Latin, fumus, smoke, some have said on account of the light unsubstantial character of the plant; but, according to Pliny, because the watery juice brought on such a flow of tears that the sight was dimmed as by smoke. This is not very satisfactory; but nothing better in the way of explanation has been offered, so we must be content with it. It had formerly a great reputation in medicine. Flowers from May till September.

There are three other British species:—

Rampant Fumitory (F. capreolata) which climbs to a height of 1½ to 2 feet by means of its twisting leaf-stalks. Its cream-coloured flowers are more loosely borne in the raceme than in F. officinalis. Small-flowered Fumitory (F. densiflora), similar to F. officinalis, but smaller and weaker, flowers paler, racemes short, leaflets smaller and narrower.

Least-flowered Fumitory (F. parviflora), with small pale flowers and minute sepals; racemes dense.

These three species are rare, the last especially so.