xii LIST OF ILLUSTRATIONS 



IRIS SOFARANA MAGN1FICA . . . to face page 114 



KOROLKOWI . . . ,' - r , ." ,, n8 



* PUMILA CAERULEA . . . . , }J 122 



* STATELLAK . V . . > . . 134 



* GERMANICA . . . W\ ' ,, 1 44 



ASIATICA . . " . . . . ,, 146 



* FLORENT1NA . . ." " . ,, 150 



* XIPH1UM . . . . ,, 154 



XIPHIOIDES (by courtesy of Messrs Kelway) . ,, 158 



RETICULATA . . , . . , , 1 64 



* ORCHIOIDES . . , . ,, 172 



t WARLEYENSIS . . . . . ,,174 



SJNDJARENSIS . . . . . . ,, 176 



WJLLMOTTIANA . . . . . ,, 178 



* SISYRINCHIUM * . . . . ,, 1 88 



* TUBEROSA . . ' . . . . ,, 190 



A STUDY OF GERMAN IRISES . . . , ,, 214 



* From photographs by E. Allard. 



f From blocks kindly lent by Mr C. G. vau Tubergen, Junr., of Haarlem. 



