THE APPLE. 



21 



to denote both the calyx-tube and the segments.) Inserted in this 

 tube is a ring of small, bristle-like organs, which are the dried-up re- 

 mains of the stamens, and these occupy three different positions in 

 the tube. 



Stamens median. 

 Tube funnel-shaped. 

 Core meeting. 



a. Stamens marginal. 

 Tube conical. 

 Core clasping. 



b. Cells round. 



The tube itself is either conical or funnel-shaped. Further inside 

 just beyond the tube, is the core, the cells of which assume four differ- 

 ent forms. Each of these varies in its relation to the axis of the fruit, 

 some extending close to it and forming symmetrical cells, while others 

 are distant from it and are unsymmetrical. 



a. Stamens marginal. 

 Tube funnel-shaped. 

 Core clasping. 



b. Cells elliptical. 



a. Stamens basal. 

 Tube funnel-shaped. 

 Core clasping. 



1. The Stamens. Hogg adopts the varying positions of the sta- 

 mens in the tube as the primary divisions of his system, having found 

 by experience that they are on the whole the most reliable characters 

 where all are more or less changeable. The stamens are (1) marginal, 

 when near the inner end of the tube; (2) median, when near the 



