Anatomic structure of leaf of some species of Hemerocallis genus

This is research of anatomic features of structure of leaf of 4 species of Hemerocallis genus in the conditions of forest-steppe zone of Western Siberia. It is provided the description of upper and lower epidermis, cross section of leaf. It is revealed that the structure of lamina is characterized by xeromesophytic characters. It is mentioned species specificity in arrangement of adaxial and abaxial stomas pursuant thereto leaves of two types of daylily are amphistomatic and hypostomatic. The greatest number of stomas observed on the abaxial part of leaf (53 – 72 pieces per 1 sq.mm). The conductive system of leaf is presented by well developed bunches of collateral type alternating with large pneumatic cavities