Raoul Maucherat Paul De Longpre ( 1859 - 1920 ) was a French painter. Raoul Maucherat Paul De Longpre s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 874.34 USD for Iris xyphioides (English Iris) in 2003 to 13560 USD for lilac & bearded iris on a stone shelf in 2004 , based on the size and medium of the artwork.