46 



10b. (a) Oalyx-tube. 



(b) Calyx-rim. 



(c) Staminal ring. ■> 



(d) Floral disc, more advanced than in Fig. 10a. 



(e) Ovary. 



(/) Base of style. 



10c. (a) Calyx-tube. 



(b) Calyx-rim. 



(c) Staininal ring. 



(d) Floral disc, more advanced than in Fig. 10b. 



(e) Half-developed ovary. 

 (/) Base of style. 



10d. (Showing capsular disc) — ■ 



(a) Calyx-tube. 



(b) Calyx-rim. 



(c) Staminal ring. 



(d) Capsular disc. 



(e) Valves of the capsule. 



10e. (Showing capsular disc) — 

 (o) Calyx-tube. 



(b) Calyx-rim. 



(c) Staminal ring. 



(d) Capsular disc. 



(e) Valves of the capsule. 



It will be observed from the figures that the floral disc changes (evolves) into the capsular disc ; 

 in other words, there is no fixed line between them. The evolution of the calyx can be traced in the same 

 way. 



PLATE 250. 



The Disc. 

 E. •pyriformis Turcz. var. Kingsmilli Maiden (1a to 1e, of which 1e is alone of natural size). 



1a. Longitudinal section of flower. 



(a) Calyx-tube with wing. 



(b) Calyx-rim. 



(61) Thickness of calyx-tube. 



(c) Staininal ring. 



(d) Nectary trough between the staminal ring and the floral disc. 



(e) Floral disc. 



(/) A deep nectary between the ovary and the floral disc. 

 ((/) Ovary and style. 

 (//) Ovary. 



1b. A very young fruit. 



(a) Calyx (calyx-tube) showing prominent ribs. 



(b) Calyx-rim. 



(bl) Thickness of calyx-tube. 



(e) Torn membranous lining of the lower edge of the operculum. 



(d) Staminal ring. 



(e) Outer nectary (between the inner edge of the staminal ring and the disc). 

 (/) Floral disc. 



(g) Inner nectary, surrounding the ovary. 

 (/() Ovary and style. 



