90 FODDER AND PASTURE PLANTS. 
It is also a trifle lighter in colour, and the shiny lustre, characteristic 
of the seed of Perennial Rye, is much less conspicuous. The weight 
of the seed varies, sixteen pounds per bushel being the average for 
good seed; it sometimes rises to twenty-four pounds per bushel. 
WESTERN RYE GRASS (Agropyron tenerum Vas.) 
Plate 15; Seed, Plate 27, Fig. 26. 
Other English names: Slender Wheat Grass, Bald Wheat Grass. 
Botanical description: Western Rye Grass is perennial with 
a very short rootstock not creeping, like that of Couch Grass, which 
Western Rye in other respects, closely resembles. On account of 
the shortness of the rootstock, the stems and shoots become crowded 
and the whole plant grows in dense tufts. Western Rye is therefore 
a bunch grass. Besides a great number of strong roots from the 
short underground rootstocks, numerous stems and sterile shoots 
are produced. Both stems and sterile shoots are strictly upright, 
the former being from two to four feet high, the latter varying with 
individual plants and in different localities. Western Rye Grass 
varies in many other respects. Thus the foliage of some individuals 
is poor and confined almost entirely to the base of the plant, whereas 
in others it is about as rich as that of ordinary Timothy and dis- 
tributed along the stems to above the middle. Plants with narrow, 
dry leaves may be found growing beside individuals with broad and 
rather soft leaves; and greyish or bluish-green plants occur side by side 
with bright green ones. The flowers are in a long, spike-like inflor- 
escence which has the flattened spikelets solitary at each joint and 
thus somewhat resembles that of Perennial and Italian Rye Grass. 
As the two latter grasses turn the narrow side of the spikelets toward 
the main stem, whereas the spikelets of Western Rye (like those of 
all other species of the genus Agropyron) turn their broad side 
toward the main stem, there is little danger of confusion. Moreover, 
in the spikelets of a species of Agropyron there are two sterile glumes 
(see page 10); whereas the species of the genus Lolium have only 
one sterile glume. In Western Rye the two sterile glumes are about 
as long as the whole spikelet and sometimes enclose it completely. 
The spikelets are always strongly appressed to the main stem, making 
the whole inflorescence narrow and slender—hence the name Slender 
Wheat Grass. At first they are green but toward ripening time 
