Constantin Von Ettingshausen And Alois Pokorny ( 1826 - 1897 ) was a German painter. Constantin Von Ettingshausen And Alois Pokorny s works have been put up for auction numerous times, with realized prices varying from 200 USD for PLANT STUDIES in 2005 to 750 USD for A group of four works from Physiotypia plantarum Austriacarum in 2014 , based on the size and medium of the artwork.