94 ROSACEAE. 



crenate continuous pith ; alternate somewhat raised transverse 

 or crescent-shaped leaf-scars with 3 bundle-traces ; no stipule- 

 scars ; sessile ovoid pointed buds with several exposed scales ; 

 rather small finely serrate short-petioled lance-oblong leaves ; 

 small perfect polypetalous epigynous white flowers in corymb- 

 like clusters terminating the spurs; and i- to 2-seeded somewhat 

 elongated small red pomes bearing the sepals somewhat below 

 the top, the fruit-stalks with very large lenticels. 

 Leaves pubescent beneath. P. villosa. 



Leaves glabrescent. P. villosa laevis. 



COTONEASTER. 



Mostly deciduous shrubs with hard light brown wood with 

 minute diffused ducts and fine medullary rays ; slender rounded 

 twigs ; angular homogeneous small pale pith ; alternate some- 

 what raised small transverse leaf-scars with I or 3 bundle- 

 traces ; narrow stipule-scars or persistent stipules ; solitary ob- 

 long sessile buds with about 4 exposed scales ; simple entire 

 stalked leaves ; small perfect epigynous flowers in terminal 

 corymbs ; and small berry-like pomes with incurved sepals. 



1. Evergreen: leaves very small, glossy. C, microphylla. 

 Deciduous or not fully evergreen. 2. 



2. Leaves white- or gray-woolly beneath. 3. 

 Leaves glabrate. 5. 



3. Sepals glabrous on the outside. 4. 



Sepals gray-fleecy. C. tomentosa. 



4. Leaves orbicular. C. racemiflora. 

 Leaves elliptical- or round-ovate. C. integerrima. 



5. Fruit black. C. acutifolia. 

 Fruit red. C. acuminata. 



AMELANCHIER. Shadbush. 



Shrubs or trees, usually rather small, with smooth bark ; 

 reddish brown hard wood with minute ducts, more crowded in 

 spring, and fine medullary rays ; slender nearly terete twigs ; 

 somewhat 5-sided pale continuous pith ; alternate sometimes 2- 

 ranked low crescent-shaped leaf-scars with 3 bundle-traces ; no 

 stipule-scars; appressed elongated acute buds with about 5 ex- 



