Роды Hymenolobus и Hornungia (Cruciferae) флоры Дагестана: ботанико‑географические заметки

The genera Hymenolobus and Hornungia in the flora of the Caucasus occupy a special place among the Cruciferae. First of all, both genera are relatively close, hence the repeated attempts to unite them  in  one  genus  (Hayek,  1924;  Appel,  Al‑Shehbaz,  1997;  German,  2005);  secondly,  they  are spring  ephemerals;  thirdly,  the  plants  of  these  genera  are  of  extremely  small  size;  fourthly,  the ecological niches of representatives of these genera are very limited, although they are different among  themselves. Hymenolobus procumbens was  first  discovered  in  the  Manas‑Samur  region of the Eastern Caucasus. The northernmost known population of H. puberulus was found in the Verkhne‑Sulak botanical and geographical region of the Eastern Caucasus. Ecology of a Hornungia angustilimbata population in the Talginsky Canyon has been studied in detail.