Abstract: Pugionium cornutum( L. ) Gaertn is a biennial herb found in the desert zone. The special species of China grows in fluxion and sem-i fluxion sand dune and is a good plant for fix sand. The study on vegetative growth law and leaf anatomy of different vegetative growth stagesmastered growth character of Pugionium cor- nutum( L. ) Gaertn and relation between leaf structure and its function to provide theory foundation for cultiva- tion and development. The results are showed below: The total vegetative growth period of Pugionium cornu- tum( L. ) Gaertn is ( 130? 4) d which is successively divided into four stages: germinating stage, seedling stage, vigorous growing stage and senescent growing stage, and the days of each stage are respectively 16-18 d, 20- 22 d, 50-52 d, 40-42 d; Leaf of Pugionium cornutum( L. ) Gaertn has evolved the high photosynthesical eff-i ciency wreath grid type leaf, transporting tissue is flourishing, but mechanical tissue is unflourishing; leaf ep-i dermis is formed of two lager of cell which is epidemis cell and accessory epidemis cell, the number of epidemis cell developed big bulliform cell for storaging water; stoma of leaf grow below epidemis and have the bigger sub- stomatic chamber.

Key words: Pugionium cornutum( L. ) Gaertn, Vegetative growth, Growth and development law, Anatomy

CLC Number: 

• S634.4