Genista tinctoria, with common names: Dyer's Broom, Dyer’s Greenweed, Dyer's Whin, Furze, Greenbroom, Greenweed, Waxen Woad, Woad Waxen and Waxen Wood, is a plant species of the genus Genista.
A perennial herbaceous shrub which is found in dry uplands from Maine to Massachusetts and in eastern New York, as well as in meadows, pastures and woods in Europe. Growing to a heights of 1-2 feet, the stems are woody, slightly hairy, and branched. The alternate, nearly sessile leaves are glaborous and lanceolate . Golden-yellow flowers grow in narrow panicles from June to August. The fruit is a long, shiny pod shaped like a green bean pod.
All Genista tinctoria microsymbionts were slow-growing bradyrhizobia with generation time of 10–14 h, acid tolerant, salt sensitive, and antibiotic resistant.