Abstract
The analysis of macroscopic indicators of medicinal raw materials of Thymus serpyllumand Thymus crebrifoliusis carried out. Both species grow in the territory of the Karaganda region, forms considerable formations. Results of investigation have shown that Thymus serpyllumand Thymus crebrifoliushas the general and distinctive signs. The morphological features important for diagnostics of raw materials of two spe-cies are following: for a stalk — the cross section of a stalk, the nature of their omission, color of young and lignified stalks; for a leaf — a form of leaves, existence of a leaf stake, extent of omission, an arrangement of essential oil glandules and expressiveness of veins; for inflorescences — a form and the size of an inflorescence; for a cup — a form and the size of teeth of a cup, extent of omission, existence of glandules, color; for a nimbus – the direction of growth of hairs, existence of glandules, color of a nimbus.