AMONG THE WILD FLOWERS. 35 
genus are more marked. A Natural Order may 
contain many genera. A genus may possess 
only one species, or many. The genus Vinca, 
Periwinkle, which blooms in spring, has two 
species, 7zxor and mazor - the latter is the large 
handsome blue flower so frequent in gardens ; 
the smaller species, zor, is found quite wild 
in woods. In some localities this species is 
found white ; in some a very fine rich purple, 
and with double flowers. A double flower is 
an overgrowth, in which the stamens are sub- 
stituted by additional petals in the corolla ; 
and such flowers seldom bear seed or fruit. 
Thus whilst in the flowers of the Wild Rose 
you find numerous stamens, the cultivated 
Roses are filled up with petals, which give form 
and beauty to the flower. 
An interesting little plant is abundant in the 
newly springing grass in the meadows and on 
lawns, Luzula Campestris, the Field-rush; it 
belongs to the same Nat. Order as the Com-~- 
mon Rush, Juncace#, and both are of Linn. 
Cl. VI., Hexandria, their dark flowers having 
6 stamens. The little Field Rush has a rather 
dense cluster, Aanzcle, of flowers. The perianth 
has six divisions, and in dull weather is often 
