First described by Grisebach from material which he collected near Makri in Thrace, and from Macedonian specimens of Friedrichsthal and de Frivaldzki. Its known distribution in the Balkan Peninsula is from Thessaly in the west to Thrace in the east. Northwards it extends only a short distance over the present boundaries of South (Greek) Macedonia into North Macedonia and south-west Bulgaria. It is a plant of the plains and foot-hills and in some parts of South Macedonia, as for example on the edge of the Struma Plain and the lower parts of the bordering hills, occurs in considerable quantity. The plants grow either separately or in small clumps with a low bush-like habit. In May and the early part of June the annual stems produce very numerous inflorescences with three to five relatively large flowers. The corolla is a bright yellow often with some red-orange veins on the standard. The real beauty lies in the plant as a whole with its mass of yellow flowers seen against and intermixed with the greenish-grey vegetative.

L. sulphureus Boiss. Diagn. I. ii. 35 (1843) et Fl. Orient. II. 167 (1872).

L. grandiflorus Form. in Ver. Naturf. Ver. Br nn. XXXVIII. 238 (1900).

L. cytisoides L. f. vestitus Adamovi in Denkschr. Akad. Wiss. Wien