104 THE VEGETABLE WORLD. 
Fig. 131, the two stipules are on the same side of the stem, and 
belong to two different leaves, being so mingled together as to appear 
to form two double stipules. In the Buckwheat, Fig. 132, we 
: see only a stipula placed 
between the leaf and the 
stem. 
The stipula appears, as we 
havesaid, after the leaf which 
accompanies it. Neverthe- 
Pa less, it often grows much 
aw more rapidly than the leaf, 
i a N SSS and in the bud they often 
es 4 + completely cover these 
organs. They are probably 
intended in this case to 
shelter the young leaves. 
They are also very fugitive. 
Sometimes the stipules have 
neither this rapid develop- 
ment nor this fugitive character. They are then called persistent. 
It is probable that in their persistent character they are useful to 
the plant, either in sheltering its more delicate organs and feeding 
Bs? the buds, or in replac- 
ing the leaves when 
they are prematurely 
hed 
x 
Fig. 131.—The Hop-plant. 
shed. 
Inthe grasses ( Gram- 
ine@) there is a little 
membrane which ap- 
pears to be a continua- 
tion of the inner lining 
of the petiole or sheath 
beyond the origin of 
the lamina of the leaf. 
. It is called Jigula, 
Fig. 132.—Buckwheat ( Fagopyrum). ons tail, As at 
example of ligula we give a vegetable furnished with the ligula 
leaf, the Milium multiflorum, Fig, 133, which represents a branch 
