BUDS AND STIPULES. 217 
functionless. As they get old they keep growing and hardening 
till they serve to protect the plant from browsing animals. 
In the Peas and Vetches the stipu'es vary greatly in size 
and shape. Some (figs. 17 & 18) are large and broad, some long 
and narrow, these again being in some cases (fig. 19) sagittate, 
in others (fig. 20) half-sagittate. 
Lathyrus maritimus, Bigel., belongs to the first category. The 
stipules (figs. 17 & 18) are large, foliaceous, and develop early. 
Figs. 17, 18, 19, 20. 
» Jj 
L / |i 
18 20. 19. 
Lathyrus maritimus. L. grandiflorus. L. pratensis. 
All 14 nat. size. 
In L. grandiflorus, Sibth. & Sm. (fig. 20), they are half-sagittate, 
y," and pointed. The upper and lower limbs moreover do not 
dein the same plane, but are somewhat twisted relatively to one 
another, 
In other species, as for instance in L. pratensis, they are sagittate. 
n Mi We open the bud of L. maritimus, we find that the 
the M naves and stipules occupy most of the space between 
stipul er stipules, which cover and protect both the leaves and 
their © of all the younger ones as well as the inflorescences and 
"" M leaf in its earlier stages. They are sessile, cordate, 
mmer P ade, and glabrous like the rest of the plant, with 
tion on P: nerves radiating from the point of their inser- 
Tangy) © axis. The smaller auricle is generally ovate or 
sar and entire ; the larger one has three or four cusps or 
17. 
