92 PRACTICAL NOTES ON GRASSES AND GRASS GROWING. 
Cow grass seed is worth from 20 to 25 per cent. more than 
clover seed ; but this fact is accounted for by its scarceness 1n 
comparison. 
As the seed is indistinguishable from that of red clover, the 
greatest caution is required in purchasing it, and, as a rule, it is 
only sold with the name of the man who has actually grown it 
as a guarantee of its genuineness. 
Occasionally we get samples of so-called cow grass seed from 
abroad ; but, as one can never rely upon their being true, they 
are not recommendable. 
The seed weighs about 65 Ib. per imperial bushel, with a 
germinating power of about 220,000 per pound ; 20 lb. per acre 
is the quantity usually sown. 
Zic-Zac CLovER (TRIFOLIUM MEDIUM, Hupsoy). 
This plant derives its name from its peculiar zig-zag growth. 
It is chiefly found on dry banks, roadsides, or waste places, 
whilst its bright, crimson bloom, and dark green pointed leaves 
cause it to be easily distinguishable from the common red, the 
perennial, or any other clover. 
Its seed pods are also of a peculiar shape, they are oblong in 
form, sometimes contain two seeds, and open at the side; 
whereas the pod of the allied species and varieties of this 
genus are shaped more like a pear, they open at the top, and 
contain in each one seed only. 
Zig-zag clover is a deep rooted and very coarse growing 
plant, in which respect it surpasses all other clovers. Often 
have we seen its showy blossoms peeping out from and over- 
topping the bushes on odd bits of waste land. In flavour it is 
bitter, which prejudices stock against taking a second mouthful 
of its foliage, unless sorely pressed by hunger, or want of 
something better. 
Not only does its tap-root run far down into the soil, but 
