Lecanora

Various species of _Lecanora_, particularly _L. tartarea_, known as cudbear, are used in dyeing woollen yarn.

The Commercial Products of the Vegetable Kingdom Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c. P. L. Simmonds

The Species used by the Scottish Cudbear makers were generally _Lecanora tartarea_ and _Urceolaria calcarea_; but the following lichens also give the purple colour on treatment with ammonia: -- _Evernia prunastri_, _Lecanora pallescens_,

Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer Ethel M. Mairet

The most noteworthy are _Calicium melanophæum_, found on fir-trees in Bricket Wood; _Peltigera polydactyla_, on moss-covered ground in Oxhey Woods, Watford; _Lecanora phlogina_, in the Tunnel

Hertfordshire Herbert Winckworth Tompkins 1901

At 17,000 feet occur _Lecanora ventosa, physodes, candelaria, sordida, atra, _ and the beautiful Swiss _L. chrysoleuca, _ also European species.] also some barren mosses.

Himalayan Journals — Complete 1864