Psathyrostachys huashanica is perennial herb belongs to Psathyrostachys of hordeeae of pooideae in Gramineae.Psathyrostachys distribute in center of middle Asia and Caucasus Mt.,but Psathyrostachys huashanica are only located on the Qinling Mt.in China.At present,the amount of the population is much less than the past,being at the edge of extinction.Owing to distributing limitation and importance as breeding material for germplasm storage,it was listed into the first class of national protected rare plants ...