ROSACEAE. 91 



ately small polypetalous white flowers in ample panicles ; and 



small oblong capsules dehiscent at top. 



Leaves with rather large leaflets. S. sorbifolia. 



CHAMAEBATIARIA. 



Deciduous small glandular-pubescent shrubs resembling Sor- 

 baria but with decompound fern-like foliage. 

 Leaves bipinnate, with minute leaflets. C. Millefolium. 



PYRUS. Pear. Apple. 



Deciduous trees or shrubs with hard mostly reddish-brown 

 wood with minute scattered ducts and fine medullary rays ; 

 moderately slender terete twigs sometimes dwarfed or pungent; 

 roundish continuous pale pith ; alternate somewhat raised nar- 

 rowly crescent-shaped leaf-scars with 3 bundle-traces ; scarcely 

 evident if any stipule-scars; ovoid sessile buds with several 

 often gland-tipped scales ; ovate to lanceolate entire or serrate 

 or lobed petioled) leaves ; rather large white or pink perfect 

 polypetalous epigynous flowers clustered on the spurs ; and few- 

 seeded apple- or pear-like fruit with papery core. The apples are 

 often segregated under the genus Mains. 



1. Leaves nearly glabrate. 2. 



Leaves markedly hairy or woolly beneath. 5- 



2. Leaves entire or finely serrate, ovate, (Pear). P. communis. 

 Leaves toothed or rarely lobed. "3. 



3. Leaves long-pointed. P. serotina culta. 

 Leaves at most acute. 4. 



4. Leaves ovate or oblong to lanceolate. P. angustifolia. 

 Leaves broadly ovate. P. spectabilis. 



5. Leaves toothed but scarcely lobed. 6. 

 Leaves often distinctly lobed. 12. 



6. Usually seen as shrubs. 7 

 Trees. 8. 



7. Calyx absent from the ripe fruit. P. pulcherrima. 

 Calyx persistent on the fruit. P. prunifolia Rinki. 



8. Fruit very small (scarcely 20 mm.). 9. 

 Fruit distinctly larger. 10. 



