





OF FICCS ROXBCKGHII 



ptacles, a certain amount of evolution occurs, the flowen 



25 



in length and, with their bracts, coming to form ■„'.! .7 J , " Crea8in & «»M<U»My 

 the a^a of sterile ostiolar bracts. The^oVeTon 2 H /' ""I *"* "*«* 



bracts, and the outer perianth remains closed, due to the 2 TT / "'^ pr0per 



The following were the measurements of such a flower ' ' ° Ver,aPP, " S °* i,S ^ 



Tot al height 



Height of stamens . . * 6 mra - 



Breadth from face of anther-lohes to most prominentia* of connective" 





2 5 mm 

 10 mm 



The flowers thus, in such cases of partial maturation, independent of the ac « of 

 insects, acquire dimensions four or five times as great as they have at tl,. 1 

 for the occurrence of access. The anthers become much moTetl ;' Z^T ^ 



a yellowsh-whue tmt, but the filaments remain almost unaltered in length (Plato IV id , 



Transverse sections through the anther-lobes show that the oro 



advanced to the stage of the formation of tetrads (Plate IV, figg'Tef Tl, » f 2 



dense masses surrounded by a double stratum of large tap, al cells, whi h in it. tun, 



is for the greater part embedded in tissue the cells of which have undergone fibrous 



ution of poll 



resolut 



This fibrillation has advanced to the greatest extent between the locul 



d 



along the central portions of the faces of the lobes. In the latter site even the epidermal 



cells have disappeared, and the loculi are only covered by the persistent cuticle and the 



subjacent fibrous stratum (Plate IV, fig. 5). The evolution of the anthers, how 



advances beyond this stage if insects do not gain access to the receptacle, and distinct poll 



never 



grains are never formed 



II.— Gall-Flowers. 



A. — Characters of gall-flowers at the period for access of insects to the receptacle!'. 



The following are the measurements of various specimens, some of the flowers being 

 sessile and others shortly pedicellate : — 



1. Averages of six flowers- 

 Height from hase of pedicel to summit of ovary 0-4-06 mm. 



Greatest hreadth of ovary 0*436 mm. 



Length of style along its inner side 0*478 mm. 



Diameter of stigma 0*285 mm. 



2. Height from base of pedicel to stigma, which at this time is the 



highest point 



0*826 mm. 



Height from hase of pedicel to ovary 427 mm 



Greatest hreadth of ovary 



0399 mra. 



Length of style along its inner side 256 mm. 



3. Average length of styles in ten flowers 





Along inner side 



376 mm. 





ranging from 285 mm to 427 mm. 



4. Average length of styles in five flowers 

 Along inner edge 



384 mm. 



Ann. Roy. Bot. Gard. Calcutta, Vol. I. Appendix 



