22 SYSTEMATIC POMOLOGY. 



middle; (3) marginal, when near the outer end. A sharp knife and 

 careful cutting is necessary to determine this accurately. Some va- 

 rieties have too short a calyx-tube to make three divisions safe, but 

 in general it is a very useful point. Lucas * objects to making the 



*- 



a. Stamens marginal. a. Stamens median. 



Tube conical. Tube conical. 



Core meeting. Core clasping. 



b. Cells ovate. 



position of the stamens the main character in the classification because 

 it would necessitate cutting the specimens at once which is not always 

 desirable nor practicable. However he admits that the characteristic 

 is in fact a good and constant one, in spite of occasional exceptions 

 and variable varieties. 



Stamens marginal. a. Stamens median. 



Tube funnel-shaped. Tube funnel-shaped. 



Core clasping. Core meeting:. 



2. The Tube. When conical the outlines proceed from the base 

 of the sepals or segments in a curved line inwards towards the core, 

 forming a cone. These curves are generally inwards, but occasionally 

 they are outwards, as in Fig. 1, which suggested to Hogg the formation 

 of another division, under the name of urn-shaped; but he found it 

 appeared so seldom that no importance need be attached to it. When 

 funnel-shaped the outlines are as when conical, but instead of ending 

 in a point end in a hollow cavity like the stem of a funnel. 



*Dr. Ed. Lucas, Einleitung in dasStudium der Pomologie. 1877, p. 142. 



