4. White Goose-foot (_C. album_).--A very common plant, varying in colour from a pale green to a mealy white. Stem stout, erect, from one to three feet high. Lower leaves stalked, ovate or rhomboid, more or less toothed or angular, but entire at the base. Upper leaves lanceolate, entire. Spikes of flowers irregularly clustered, leafy, and usually branched; the upper ones forming a long panicle, intermixed with the upper leaves. Perianth entirely covering the fruit. 5. Fig-leaved Goose-foot (_C. ficifolium_).--by some regarded as a distinct species, but by others included among the varieties of _C. album_. It closely resembles the latter in general appearance, but its lower leaves are divided into three unequal lobes, and are somewhat spear-shaped. 6. Red Goose-foot (_C. rubrum_).--An erect plant, from one to three feet high, with smooth, triangular, irregularly-toothed leaves, resembling those of the Upright Goose-foot. The spikes, also, closely resemble those of the same plant, but the flowers have generally only two or three segments to the perianth, and these often turn red as the fruit ripens. The flowers appear during August and September. This species is moderately common in most parts, and especially near the sea, where it may be seen growing on the shingle very close to the water's edge. 7. Mercury Goose-foot, Allgood, or Good King Henry (_C. Bonus-Henricus_).--An erect plant, from one to three feet high, growing from a thick, fleshy root like that of the Dock. Leaves stalked, triangular, acute, wavy or toothed, of a dark green colour. Upper leaves smaller, and almost sessile. Flowers in clustered, compound spikes, forming a terminal panicle, leafy below. Fruit completely enclosed in the perianth. This plant was formerly cultivated as a potherb, and is now commonly found on waste ground near villages. Time of flowering--June to August. In the same order we have the Common Orache (_Atriplex patula_)--a very variable plant, from a few inches to three feet in height, with erect or prostrate stem, and more or less mealy in appearance. Lower leaves triangular, with spreading lobes at the base. Upper leaves narrower, and entire or slightly toothed. Flowers in simple spikes, forming leafy, terminal panicles. They are of two kinds--male and female, either mixed, or collected in separate clusters. Segments of the perianth united, pointed, sometimes toothed, and spotted above. The plant flowers from July to September, and is abundant in most parts, especially near the sea. The order _Polygonaceæ_ also includes several wayside plants which may be easily distinguished as a group by the following characters:--At the bases of the alternate leaves are membranous stipules that form a sheath round the stem. The flowers are small, arranged in clusters in the axils of the leaves, or in terminal spikes or racemes. The fruit is a small nut, enclosed more or less in the persistent perianth.