Of the order _Convolvulaceæ_ we shall note one species--the Small Bindweed (_Convolvulus arvensis_), so well known as a troublesome weed in cultivated fields. It has a creeping rootstock, and a twining stem, from a few inches to two feet in length, that sometimes climbs, but more commonly trails along the ground and over low-growing plants. The leaves are stalked, arrow-shaped, about an inch and a half long, with sharp, spreading lobes at the base. The axillary peduncles are usually forked, with a single flower on each of the two branches; and there are two small bracts at the angle of the fork, and another one or a pair above these, but some distance below the flower, on each branch. The calyx is very small, but the salver-shaped corolla is usually over an inch in diameter, either pink or pinkish white. The plant flowers from June to August. [Illustration: THE SNEEZE-WORT.] The Meadow Clary (_Salvia pratensis_--order _Labiatæ_), shown on Plate IV, Fig. 6, is a rather rare plant, apparently to be seen only in the dry fields of Oxfordshire, Kent, Surrey, and the extreme south-west of England; but it is one of the most handsome of the Labiates. Its stem is erect, from one to two feet high. The radical leaves are large, stalked, ovate or cordate, toothed, and much wrinkled; and the stem-leaves few, ovate or lanceolate, acute, the upper ones sessile. The flowers are arranged in whorls of from four to six at regular distances, the whole forming a long, simple or branched spike. The calyx is divided into two lips, the upper of which has often three small teeth, while the lower is divided into two lobes; and the corolla is of a bright blue colour, about three times as long as the calyx, with a long, arched upper lip and a three-lobed lower lip. There are two stamens, each with a fertile and an abortive anther connected by a thin stalk which is fastened to the short filament in such a manner that it rocks. This plant flowers from June to August. [Illustration: THE SMALL BINDWEED.]