ON THE RESERVE PROTEIN IN PLANTS. 
83 
leaves of Prunus 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. 
Young leaves. 
Present. 
No starch. 
Prunus pseudocerasus. 
Young leaves. 
Much 
present. 
No starch. 
99 99 
Epidermis of root. 
Present. 
No starch. 
>5 99 
Inner tissue of root. 
None. 
Much starch. 
Pyrus japonica. 
Young leaves. 
Present. 
No starch. 
99 99 
Roots. 
None. 
Photinia glabra. 
Young leaves. 
Much 
present. 
Much starch. 
99 9 9 
Flowers. 
Much 
present. 
Rosa lævigata. 
Young leaves. 
Much 
present. 
No starch. 
99 99 
Flowers. 
Much 
present. 
No starch. 
Rosa Banksiæ. 
Roots. 
Present. 
No starch. 
Kerria japonica. 
Young leaves. 
Much 
present. 
No starch. 
Neutral reaction. 
Rubus palmatus. 
Young leaves. 
None. 
Neutral reaction. 
9 9 9 9 
,, berries. 
None. 
Acid reaction. 
Rubus Thumbergi. 
Young leaves. 
None. 
No starch. 
PALMEAE. 
Trachycarpus excelsa. 
Young buds. 
* 
None. 
No starch. 
