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.
588. RESEDA Luteola. DYER'S WEED, or WELD.--The most usual plant from
which the yellow dye is extracted. For its culture, see p. 32.
589. RHAMNUS Frangula. BUCKTHORN.--The bark produces a slight yellow,
and the unripe berries impart to wool a green colour.
590. RHAMNUS catharticus. PURGING BUCKTHORN.--The bark yields a most
beautiful yellow colour; and the ripe berries in the autumn produce a
brilliant scarlet.
591. RHUS Cotinus. VENUS'S SUMACH.--The bark of the stalks produces a
yellow colour; the bark of the roots produces a red.
592. RHUS coriaria. ELM-LEAVED SUMACH.--This plant is possessed of the
same qualities as the one above.
593. RUBIA tinctorum.--The root produces a red colour. For its culture,
see p. 32.
594. RUMEX maritima.
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