18 HISTORICAL INTRODUCTION 



Crepis biennis (hawk's beard) Herzinger, 1940 



Lactuca sativa (lettuce) McHargue and Calfee, 1933 



Sonchus oleraceits (sow thistle) Herzinger, 1940 



Cichorium Intybus (chicory) Muhr, 1942 



Taraxacum dens-leonis (dandelion) Muhr, 1942 



Zea mais (maize) Maze, 1919 



Saccharum officinarum (sugar cane) Martin, 1924 



Sorghum vulgare Sommer, 1927 



S. sudanense Skolnik, 1935 



Panicum miliaceum (millet) Sommer, 1927 



Phalaris canariensis (canary grass) Schropp, 1940 



Avena sativa (oat) Agulhon, 1910 



Triticum vulgare (wheat) Agulhon, 1910 



Secale cereale (rye) Lohnis, 1937 



Hordeum distichum (barley) Sommer and Lipman, 1926 



Lemna minor (duckweed) Steinberg, 1941 



L. polyrrhiza (small duckweed) Geigel, 1935 



Tradescantia albiflora Meier, 1938 



Allium Cepa (onion) Lohnis, 1937 



Chlorella sp. Geigel, 1935 

 Ulothrix tenerrima Herzinger, 1940 



Dothiorella sp. Davis, Marloth and Bishop, 1928 

 Azotobacter chroococcum Herzinger, 1940 



Silicon 



Beta vulgaris (red beet) Raleigh, 1939 

 Helianthus annuus (sunflower) Lipman, 1938 

 Zea mais (maize) Maze, 1919 

 Oryza sativa (rice) Ishibashi, 1937 

 Hordeum distichum (barley) Lipman, 1938 



Aluminium 



Pisum sativum (garden pea) Sommer, 1926 



Helianthus annuus (sunflower) Lipman, 1933 



Zea mais (maize) Maze, 1919 



Panicum miliaceum (?) (millet) Sommer, 1926 



Avena sativa (oat) Stoklasa, 1922 



Glyceria aquatica (reed meadow grass) Stoklasa. 1922 



Triticum vulgare (wheat) Stoklasa, 1922 



Hordeum distichum (barley) Stoklasa, 1922 



J uncus effusus (rush) Stoklasa, 1922 



Chlorine 



m 



Fagopyrum esculentum (buckwheat) Nobbe and Siegert, 1862 

 Pisum sativum (garden pea) Lipman, 1938 

 Zea mais (maize) Maze. 1919 



