MONOCdTYLEDONS AND DICOTYLEDONS 



>o;3 



Many of the true roses have a strong resemblance (Fig. 

 '•307) to the buttercups (Rani(nciihis), with their hypogy- 

 nous regular flowers, and indefinite number of stamens and 

 carpels, but the sepals and petals are much more frequently 

 five, the Dicotyl number being better established. The 



Fig. 249. The common. pear (Pints communis), showing hranch with flowers (1), sec- 

 tion of a flower iJ) showing its epigynoiis character, section of fruit (3) showing 

 the thiclcened calyx outside of the ovary or "core" (indicated hy dotted outline), 

 and flower diagram (4) showing all the organs in fives except the stamens. —After 

 WossiDLO. 



whole family remains actinomorphic, but perigyny and 

 epigyny aj)pear in certain forms (Fig. 205), giving rise to 

 the peculiar fruit (pome) of apples and pears (Fig. 249), in 

 which the calyx and ovary ripen together. Another spe- 

 cialized group of roses is that which develops the stone- 



