BUDS AND STIPULES. 219 
Here, however, the petiole is round, the wings lie one on each 
side of it (figs. 21 & 22), and are fully covered by the stipule 
of the preceding leaf. 
Thus, then, the differenee between the sagittate and semi- 
sagittate stipules appears to depend on the form of the stem and 
the arrangement of the bud. Where the stem is winged, the 
outer barb of the stipule would be exposed. In such cases the 
stipule is semisagittate. 
In the Garden Pea (Pisum sativum, Linn.) the stipules are not 
only large in bud, and in arrangement resemble those of Z. mari- 
timus, but they continue to grow, and appear to act as a pair of 
leaflets. 
Lathyrus Nissolia, Linn.—The first and second leaf (see ‘ Seed- 
lings,” vol. i. fig. 284) are subulate, acute, and scale-like, with 
small and tooth-like or inconspicuous stipules. The third and 
all succeeding leaves are simple, entire, linear, slightly decurrent 
upon the stem, and have a strong midrib with more slender 
parallel lateral ones. They are alternate and distichous, that is 
on the 4 plan of arrangement, acuminate, and slightly narrowed 
to the base. 
The third and all succeeding stipules are subulate, acute, 
slender, gradually becoming shorter towards the apex of the 
stem, and inserted on the edge of the decurrent leaf, where 
t is narrowed, and below the articulation with the stem. They 
appear to be functionless owing to their minute size. 
The terminal bud is enclosed in successive, convolute leaves, 
which appear to be winged petioles without leaflets or tendril. 
They vary from 8 in. to 6 in. in length, and attain a considerable 
size before they unroll, after which they continue to be more 
or ess coneave, becoming slightly twisted. The axillary buds 
"i sheltered in their axils. The terminal bud is amply protected 
y them, The plant forms a spreading tuft like a species of grass 
with coarse leaves, > 
ings ar us Aphaca, Linn.—The first and second leaves (see ‘Seed- 
pointe vol.1. fig. 285) are seale-like, and trifid, with three subulate 
leaves s. bonding to leaf and stipules. The third and fourt 
stipules er pound, with one pair of leaflets and obliquely MM 
a mall sa erable size, and having a tendril represented by 
ulate point. 
"A and succeeding leaves are reduced to a subwiate 
" on of triangular, foliaceous stipules. The subulate 
' “SURN.— BOTANY, VOL. XXXIII. R 
