MARCH. 55 
are mixed for the same purpose with tea. The branches 
are covered with long thorns, whence its name. This little 
tree soon attracts the eye in spring, as its white blossoms 
look conspicuous in the nearly naked hedges. There are 
several other species of this genus; but they do not flower 
so early as the present. 
IcOSANDRIA. PoLyGyNIA. 
CALYCIFLOR2. ROSACEZ. 
FRAGARIA. (SrrawBerry.) 
Generic Character. Calyx concave, divided into ten, the alter- 
nate parts smaller. Petals five. Stamens numerous. Fruit formed 
of numerous minute seeds, placed upon a large, juicy, dissolving 
receptacle. 
POTENTILLA. (CrinqueroI!t.) 
Generic Character. Calyx concave, divided into eight or 
ten parts, alternate divisions smaller than the rest. Petals four 
or five. Stamens numerous. uit of minute seeds, placed upon 
a flattish, dry receptacle. 
Two plants make their appearance at this early season 
which are often mistaken for each other, but a little study 
will soon make them clear. One is found in bloom a little 
