ROSACEAE— PYRUS 



513 



Fig. 274. Iowa Crab (Pyrus ioensis). 1. Flowering branch. 

 2, I^ongitudinal section of flower with petals removed, natural 

 size. 3. Fruiting branch. 4. Longitudinal section of fruit. 5. 

 Summer branch. 1, 3, 4, 5, one-half natural size. (M. M. Cheney). 



Crataegus L. Hawthorn. White Thorn 



Shrubs or small trees, usually spiny; leaves petioled; flowers in corymbose 

 clusters, white or pink; calyx-tube urn-shaped; limb 5-cleft; petals 5, roundish; 

 stamens numerous or few; styles 1-S; fruit a pome, containing 1-5 bony, 1-seed- 

 ed stones. About 75 species, although the number is sometimes estimated as 

 high as 125. Some species, like C. punctata, and C. mollis, are ornamental. 



Crataegus mollis Scheele 



Shrub or small tree ; shoots densely pubescent ; leaves large, slender-petioled, 

 cuneate, truncate or cordate at base, usually with acute lobes; more or less 

 densely pubescent beneath ; flowers large, 1 inch across ; fruit bright scarlet with 

 a light bloom. 



