Structural characteristics of leaf trichomes and epidermis in species from three sections of the genus Aristolochia.

The structure of leaf epidermis in species from three sections (Diplolobus, Gymnolobus, and Siphisia) of the genus Aristolochia has been examined by light and scanning microscopy methods. As the results show, the number of the stomata and the length of stomatal guard cells in plants growing ex situ are not related to habitat conditions but are probably determined genetically. According to the type of leaf epicuticular waxes, the studied taxa can be divided into three groups, of which the Aristolochia-type is the most common.

Pollen ultrastructure in Aristolochia manshuriensis and A. contorta (Aristolochiaceae).

Pollen ultrastructure has been studied in two relict and rare species of the genus Aristolochia, A. contorta Bunge and A. manshuriensis Kom.

[Genetic variation of the relict species Acanthopanax sessiliflorus (Rupr. et Maxim.) Seem. (Araliaceae) in Primorsky Krai].

Based on the analysis of 17 genes encoding the allozyme diversity of 12 enzyme systems, data were obtained on the genetic variation of a relict of the Tertiary flora, a valuable medicinal plant Acanthopanax sessiliflorus (Rupr. et Maxim.) Seem.