


221 
DEVELOPMENT OF LEAVES, PITCHERS, STIPULES 
AND TENDRILS,—Prares LVIII. TO LX. 
Pl. 59. A. Bauhinia. 
1. Very young leaf. Lateral view. 
2. Front view. - 
3. Apex of growing point ; a. a. stipules or scale buds— 
one deflexed ; b. the leaf of the same; c. first puncta 
of other stipules; d. disc. This bears on very oblique 
Pistilla !* 
Pl. 59. B. Bursera (Boswellia) serrata. 
|. Vertical view of apex of axis, shewing the three 
puncta, of which two are very small. 
2. The same, with very young leaves not removed, seen 
vertically. 
3. Ditto lateral. 
4. Very young leaf =. Front view. 
5. Same more developed lateral; the undulating promi- 
nences on the further pinnule. 
6. Same more advanced seen in front. 
7. Transverse section of same. 
8. Oblique lateral view of leaf more advanced. 
An instance shewing that the point of the leaf may be quite 
simple at*first, and yet subsequently become foliaceous. It 
shews also that the pinnation is determined by the develop- 

g g tyle, and so destroying that definition 
which states ‘the stigma is the upper extremity of the style." I may cite as 
instances, Apocynez, Asclepiadex, and in a very marked degree Nymphea, and 
still more the aphalangial forms of Pandanus, in which the stigmata are papillose 
lines on the posterior side of the spinous prolonged subulate styles. = 
" The single vascular fascicle, one to each division or costa of ovarium, 1sin accord- 
ance with a tricarpellary structure, but not with a hexacarpellary; the placental 
vessels rarely if ever being single. uy i ae 
In the six carpelli hypothesis, p d 

