ON THE RESERVE PROTEIN IN PLANTS. 83 



leaves of Primus contain a large amount of active albumen. The 

 passive albumen may easily be found in leaves that do not 

 contain active albumen, by crushing them in a mortar, adding 

 water, filtering, and adding nitric acid to the filtrate. The co- 

 agulation by this acid or by heat leaves no doubt that albumen 

 was present. Some biological relations of interest are re- 

 cognized from the inspection of the following tables : — 



ROSACEAE. 



Species. 



Objects tested. 



Active 



ALBUMEN. 



Remarks. 



Prunus persica. 

 Prunus pseudocerasus. 



1 1 11 

 11 11 



Young leaves. 

 Young leaves. 

 Epidermis of root. 

 Inner tissue of root. 



Present 



Much 

 present. 



Present. 

 None. 



No starch. 

 No starch. 

 No starch. 

 Much starch. 



Pyrus japonica. 

 11 11 



Roots. 



X 1 CoCIll. 



None. 



No starch. 



Photinia glabra. 

 11 11 



Young leaves. 

 Flowers. 



Much 

 present. 



ivi ucn 

 present. 



Much starch. 



Rosa laevigata. 



11 11 

 Rosa Banksias. 



Young leaves. 



Flowers. 

 Roots. 



Much 

 present. 



Much 

 present. 



Present. 



No starch. 



No starch. 

 No starch. 



Kerria japonica. 



Young leaves. 



Much 

 present. 



No starch. 

 Neutral reaction. 



Rubus palmatus. 



11 11 

 Rubus Thumbergi. 



Young leaves. 



,, berries. 

 Young leaves. 



None. 

 None. 

 None. 



Neutral reaction. 

 Acid reaction. 

 No starch. 



PALMEAE. 



Trachycarpus excelsa. 



Young buds. 



None. 



No starch. 



