— 
. Liberation of the young pollen grains. 
. Development of grume and cellular membrane : out- 
DEVELOPMENT OF THE FLOWER 
. Stamen, front view. 
Ditto, lateral. 
Ditto, back. 
One of the inner stamina. 
. Pistillum, as seen from the ventral face. 
Stamen in front, rather more advanced than c. 
. Its grume now separable, but not cellular even un- * 
der E C. N 
Development of Pollen. 
; Parent cells, 1 M. à 
. Same detached; 
Parent cells, still ‘adhering : nucleus of 5, now di- 
‚vided into 3 or 4, each with a Eom and rudi- 
ments of one tegument, 1. 
. Parent cells, now easily separable or even separa- 
ting 1 
. 1 
. Young bétiin grain, escaped, ; 
Young pollen grains, =, 
More advanced, (surface in focus.) 
. Same, centre in focus. 
Perfect pollen grain, i 
Sequence. 
. Grume. 
. Grume and traces of cells. 
Cellular cohering, cells: nucleary nucleus, like a glo- 
bule of fusion. 
. Divisions of nuclei. 
- Formation of each into a contained palle grain, dis- 
appearance of nuclei. s 
bj 
lining of the folds or furrows. 
Striz of the outer coat. 
. B. [Capital letters refer to sequence of period.] 
AMHEnsTIA NoBILis.—(Continued,) Pl. xix. 
- Young bud, bractez removed laterally. 
