. Flowers of the field. Botany. 28 19. Alliaria (Garlic Mustard) I. A. ofwinalis (Garlic Mustard, Jack-by-the-Hedge, or Sauce- alone).—Leaves broadly heart-shaped, stalked, heavily veined. An early flowering hedge-plant, 1-3 feet high, with delicate green leaves and snow-white flowers. The whole plant emits when bruised a nauseous scent of garlic, from which it derives its Latin and English names.—Fl. April to June. Annual or biennial. 20. Erysimum [Treacle Mustard) 1. E. cheiranthoides (Treacle Mustard, Worm Seed).—Leaves narrow, slightly toothed, roughish with three-forked bris
. Flowers of the field. Botany. 28 19. Alliaria (Garlic Mustard) I. A. ofwinalis (Garlic Mustard, Jack-by-the-Hedge, or Sauce- alone).—Leaves broadly heart-shaped, stalked, heavily veined. An early flowering hedge-plant, 1-3 feet high, with delicate green leaves and snow-white flowers. The whole plant emits when bruised a nauseous scent of garlic, from which it derives its Latin and English names.—Fl. April to June. Annual or biennial. 20. Erysimum [Treacle Mustard) 1. E. cheiranthoides (Treacle Mustard, Worm Seed).—Leaves narrow, slightly toothed, roughish with three-forked bristles, duU green ; fods erect on spreading stalks ; stem branched, 1-3 feet high ; flowers small, yellow, with whitish sepals. Fields, gardens, and waste places, not common.—Fl. June to August. Annual. 2. E. orientale (Hare's-ear Treacle Mustard). — With smooth entire leaves clasping the sletn, which is about i foot high ; flowers cream-coloured. Grows on some parts of the coast of Essex, Suffolk, and Sussex, but is an escape.—Early summer. Cheiranthus Ciieiri {W all-flower) 21. Cheiranthus [Wall-flower) I. C. Cheiri (Wall-flower).—The only British species, flourishing best on the walls of old buildings, and producing its sweet-scented yellow flowers nearly all the summer, although scantily supplied with water. Not a true native, but has become thoroughly established in many situations of the kind described above. Many beautiful some with Perennial. varieties are cultivated in gardens, blood-red flowers, some double. 22. Matthiola [Stock) I. M. incana (Hoary Shrubby Stock, Gilli- flower).—Stem shrubby, 1-2 feet high ; leaves hoary with down, entire ; flowers large, light purple. The origin of the garden Stock. On the southern seashore of the Isle of Wight. —Fl. May, June. Perennial. 2. ^L sinnata (Great Sea Stock).—Stem herbaceous, spreading; leaves oblong, downy, the lower ones imperfectly lobed; pods rough with prickles ; flowers dull purple, very
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