IOWA ACADEMY OF SCIENCES. 



137 



greasy when green; cavity medium, sloping gradually; stem 

 five-eighths to one inch, stout; basin broad, wide at bottom; 

 calyx closed; flesh firm, meaty; quality brisk acid without 

 astringency; texture pithy, but juicy; core small, ovate; seed 

 small, dark, plump; season probably midwinter. General 

 notes. 



Fig. 8. Variations In leaves of Howard. 



The Howard crab is, in all probability, the result of a cross 

 between P. lowensis and P. malus. The leaves resemble those 

 of P. lowensis in serrations, but leaves are also present, reg- 



