THEIR FORM AND FUNCTION. 239 
so that the leaf remains erect. This case is, so far as I know, 
unique. 
Fig. 11. 
Shoot of Bucklandia populnea.—S, S. Stipules. P. Petiole. 
MYRTACER. 
In the Myrtaceæ, again, we have cases of glandular stipules. 
In Psidium Cattleyanum they consist of 1-4 subulate processes, 
or of one rather membranous and colourless, trifid, or tridentate 
piece. They scarcely seem to be protective, but the outer 
process is generally tipped with a globule of fluid. 
LYTHRARIER. 
Punica Granatum.—Here also we find glandular stipules. The 
stipular processes are of two kinds—intrapetiolar glandular 
processes, of which those on the outer edge of the petiole are 
the largest; and secondly the triangular-subulate obtuse pro- 
longations of the wings of the stems. 
Lafoensia microphylla.— Here, again, the stems are quadrangular 
or narrowly winged, apparently from the leaves being decurrent. 
