ROSACEAE. 93 



2. Leaves pinnate throughout. 3. 



Upper part of leaves not pinnate. X S. hybrida. 



3. Buds silky, not glutinous. S. Aucuparia. 

 Buds very glutinous. S. americana. 



CHAENOMELES. Japanese Quince. 



Deciduous firm-leaved shrubs, with typically axillary spines; 

 with roundish rather slender twigs ; irregular rounded homogen- 

 eous pale pith ; alternate raised crescent-shaped small leaf-scars 

 with 3 sometimes compound bundle-traces ; small stipule-scars ; 

 ovoid small solitary sessile buds with about 2 exposed scales ; 

 crenulate to serrate moderate-sized short-stalked leaves ; rather 

 large solitary deep red to pure white perfect epigynous poly- 

 petalous flowers ; and large fragrant many-seeded orange ponies. 

 Often placed under Cydonla. 



1. Stipules large and leaf-like. 2. 



Stipules small. C. sinensis. 



2. Leaves pubescent when young. C. cathayensis. 

 Leaves glabrous. 3. 



3. Twigs glabrate : leaves sharply serrate. C. japonica. 

 Twigs hairy when young : leaves crenate. C. Maulei. 



CYDONIA. Quince. 



Deciduous shrubs or very small trees with light brown firm 

 wood with minute diffused ducts and fine medullary rays; 

 rounded twigs ; small roundish homogeneous pale pith ; alter- 

 nate raised crescent-shaped 3-lobed small leaf-scars with 3 bundle- 

 traces ; no stipule scars ; simple entire stalked moderately large 

 leaves ; rather large perfect epigynous polypetalous whitish 

 flowers solitary at ends of the branches ; and large firm aro- 

 matic pomes. 



1. Leaves not variegated. 2. 



Leaves mottled. C. oblonga marmorata. 



2. Round- topped. (Common quince). C. oblonga. 

 Conical. C. oblonga pyramidalis. 



PHOTINIA. 



Deciduous shrubs with hard wood with minute diffused 

 ducts and fine medullary rays ; rather slender roundish twigs ; 



