No. 14.] FLOWERING PLANTS AND FERNS. 433 



also possible that a species now considered adventive and well 

 established may later disappear. 



Sorghum halepense (L.) Pers. 



Echinochloa frumentacea (Roxb.) Link. 



Bromus squarrosus L. 



Agropyron tenerum Vasey. 



Elymus brachystachys Scribn. & Ball. 



Salix incana Schrank. 



Corylus heterophylla Fisch. 



Cycloloma atriplicifolium (Spreng.) Coulter. 



Chenopodium capitatum (L.) Aschers. 



Atriplex tatarica L. 



Acnida tuberculata Moq. 



Acnida tuberculata Moq., var. prostrata (U. & B.) Robinson. 



jMirabilis Jalapa L. 



Anychia polygonoides Raf. 



Tetragonia expansa Marr. 



Gypsophila muralis L. 



Gypsophila elegans Bieb. 



Nigella sativa L. 



Nigella damascena L. 



Eschscholtzia californica Cham. 



Lepidium ruderale L. 



Lepidium Draba L. 



Iberis amara L. 



Camelina sativa (L.) Crantz. 



Camelina microcarpa Andrz. 



Neslia paniculata (L.) Desf. 



Brassica japonica Siebold. 



Diplotaxis muralis (L.) DC. 



Conringia orientalis (L.) Dumort. 



Alliaria officinalis Andrz. 



Sisymbrium canescens Nutt. 



Sisymbrium Sophia L. 



lodanthus pinnatifidus (]\Iichx.) Steud. 



Reseda Luteola L. 



Reseda odorata L. 



Philadelphus inodorus L. 



Deutzia scabra Thunb. 



28 



