Dyer's greenweed (Genista tinctoria) is another nationally rare plant that is found in Dorset. It is very much like broom (it is a member of the Pea family too) only much smaller growing to a height of about 18 inches. It grows in grassy areas on heavy soils and it flowers from June in to August. It can be found in just one of the meadows at Durlston and also in a couple of cuttings on the Swanage Railway (thanks to Ted Pratt's book). I have also seen it at Powerstock Common and Alner's Gorse; it may occur elsewhere in Dorset but I have not seen it.
As the plant's name implies, it was used for dying material, even the scientific name suggests that too. Do not confuse this with the much more common dyers rocket, better known as weld.