The Hare’s-ear Treacle Mustard (Erysimum orientale) is a rare crucifer, frequenting the cliffs of the southern and eastern counties. It grows to a height of one to two feet, and bears its white flowers about midsummer. It has glaucous leaves, and the fruit-pods are quadrangular in form.

Fig. 307.—The Great Sea Stock

Fig. 308.—The Hoary Shrubby Stock

The Common Scurvy Grass (Cochlearia officinalis) is abundant on many shores, and its fleshy leaves, once highly valued as an antiscorbutic, are still used for salad by the cottagers near the sea. It generally grows to a height of six or seven inches, and displays its white flowers during late spring and early summer. The root-leaves are cordate in form, and the upper ones are sessile and angled, half embracing the stem. The fruit is a rounded pouch. A variety (danica) with stalked, deltoid leaves and an oval veiny pod, is plentiful in some places.