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. DOCK.--The whole herb gives out a yellow colour. 595. SALIX pentandra. WILLOW.--The leaves produce a yellow colour. 596. SCABIOSA succisa. DEVIL'S BIT SCABIUS.--The dried leaves produce a yellow colour. 597. SERRATULA tinctoria. SAW-WORT.--The whole herb produces a yellow tincture. 598. SENECIO Jacobaea. RAGWORT.--The roots, stalks, and leaves, before the flowering season, give out a green colour which can be fixed on wool. 599. STACHYS sylvatica. HEDGE-HOREHOUND.--The whole herb is said to dye a yellow colour. 600. THALICTRUM flavum. YELLOW MEADOW-RUE.--The roots and leaves both give out a fine yellow colour. 601. THAPSIA villosa. DEADLY CARROT.--The umbels are employed by the spanish peasants to dye yellow. 602. TORMENTILLA erecta. ERECT TORMENTIL.--This root is red, and might probably be usefully employed. 603. TRIFOLIUM pratense. MEADOW-CLOVER.--The inhabitants of Scania employ the heads to dye their woollen cloth green. 604. URTICA dioica. NETTLE.--The roots of bettles are used to dye eggs of a yellow colour against the feast of Easter by the religious of the Greek church, as are also madder and logwood for the same purpose. 605. XANTHIUM strumarium. LESSER BURBOCK.--The whole herb with the fruit dyes a most beautiful yellow. * * * * * SECTION XII.---PLANTS USED IN RURAL OECONOMY. The following few plants are such as are used for domestic purposes which do not fall under any of the foregoing heads, and I therefore have placed them together here. 606. CONFERVA.--This green thready substance has the power of rendering foetid water sweet; for which purpose, when water is scarce, it is usually put into water-tubs and reservoirs. 607. CORYLUS Avellana. HAZEL NUT.--The young shoots of hazel put into casks with scalding water, render them sweet if they are musty, or contain any bad flavour.