228 DEVELOPMENT OF LEAVES, 
6. Leaf more advanced, two lobes; two stipule and 
axillary disc. 
7. A more advanced leaf; a. a. shews the lateral lobes of 
the pinnules; 4. the bud in axil of stipula ; c. future tendril. 
8. More advanced, in this as in preceding ; lamina commen- 
ced, and conduplicate, same figures have same references. 
Results. 
l. That in all three, the stipule are nothing but the lowest 
pinnule of the leaf. 
This is probably the case with all which have alternate 
leaves and opposite stipulz. 
The direction of development is curious, first terminal 
punctum, then stipules, then intermediate pinne from above 
downwards. 
2. No distinction between development of Cissus and Passi- 
flora! in regard to leaves, stipulze, tendril, or first steps of the 
bud. (?) 
3. No distinction at first between flower and leaf bud; 
compare the stipular bud of this, with that of P. kermesina. 
4. That that of Bauhinia diphylla has folium impari pin- 
nate or trifoliatum. 
In a species of Bauhinia, protecting functions are assumed 
by the end of the petiole, which is dilated, sub-foliaceous, as 
much so as the real stipule, and cucullate, embracing the 
two young pinnules!! "This remains up to a latish period. 
In this instance also the stipule from their development 
posterior to the leaf punctum are to be considered as the 
pinnules lowermost pair. 
The same also occurs in Hymenza Courbaril, the stipules 
are formed posteriorly to the leaf punctum, and however 
distinct they may be afterwards, have as in the preceding, in 
their very young state, exactly the appearance of a leaf tripin- 
nulate, and are moreover evidently belonging to the leaf 
punctum. 
Between Cissus and Passiflora there is no discrimination 
in developments, either of stipule leaves, or tendril, the axil- 
