564. DATISCA cannabina. BASTARD-HEMP.--This produces a yellow; but is not easily fixed, therefore it presently fades to a light tinge. 565. DELPHINIUM Consolida. BRANCHING LARKSPUR.--The petals bruised yield a fine blue pigment, and with alum make a permanent blue ink. 566. FRAXINUS excelsior. MANNA.--The bark immersed in water gives a blue colour. 567. GALIUM boreale. CROSS-LEAVED BEDSTRAW.--The roots yield a beautiful red, if treated as madder. 568. GALIUM verum. YELLOW BEDSTRAW.--The flowers treated with alum produce a fine yellow on woollen. The roots, a good red. 569. GENISTA tinctoria.--The flowers are in use among the country-people for dyeing cloth yellow. 570. GERANIUM sylvaticum. MOUNTAIN CRANESBILL.--The Icelanders use the flowers of this plant to dye a violet colour. 571. HIERACIUM umbellatum. HAWKWEED.--The whole herb bruised and boiled in water gives out a yellow dye. 572. HUMULUS Lupulus. HOP.--The strobiles are used for dyeing; but although they yield a yellow colour, the principal use is as a mordant. 573. HYPERICUM perforatum. PERFORATED ST. JOHN'S WORT.--The flowers dye a fine yellow. 574. IRIS germanica. GERMAN IRIS.--The juice of the corolla treated with alum makes a good permanent green ink. 575. ISATIS tinctoria. WOAD.--The leaves steeped in water till the parts are decomposed, produces a fine blue fecula, which is made into cakes, and sold to the woollen-dyers. For its culture, see p. 32. 576. LICHEN Roccella. ORCHIL.--The fine purple called orchil is extracted from this moss. 577. LITHOSPERMUM officinale. GROMWELL.--The roots afford a fine red, which is used by the young girls in Sweden to colour their faces. 578. LYCOPODIUM complanatum. CLUB-MOSS.--The juice of this plant extracted by an acid forms a most beautiful yellow. 579. LYCOPUS europaeus. WATER-HOREHOUND.--The juice of this gives out a black colour, and is sometimes used by the common people for dyeing woollen cloth. The gypsies are said to use the juice of this plant to colour their faces with. 580. LYSIMACHIA vulgaris. LOOSESTRIFE.--The juice of the whole herb is used to dye woollen yellow. 581. MYRICA Gale. SWEET GALE.--The whole shrub tinges woollen of a yellow colour. 582. NYMPHAEA alba. WHITE WATER-LILY.--The Highlanders make a dye with it of a dark chesnut colour.--Light. Fl. Sc. 583. ORIGANUM vulgare. WILD MARJORAM.--The tops and flowers contain a purple colour, but it is not to be fixed. 584. PHYTOLACCA decandra. VIRGINIAN POKEWEED.--The leaves and berries produce a beautiful rose-colour, but it is very fugacious. 585. PRUNUS domestica. PLUM.--The bark is used by the country people to dye cloth yellow. 586. PYRUS Malus. APPLE,-The bark of this plant, also, produces a yellow colour. 587. QUERCUS Robur. OAK.--The juice of the oak mixed with vitriol forms a black ink; the galls ar employed for the same purpose.