186 DESCRIPTIONS OF THE SHRUBS 



H. Flowers small, white or pinkish ; leaves very variable, often 



lobed ; low bush to 30 feet. Dwarf Crab — Pyrus Torfngo. 

 H. Flowers rosy-red appearing with the leaves in large showy 

 clusters ; fruit red, not persisting till winter, seeds not especially 

 large ; plant often thorny. Flowering Crab — Pyrus flori- 

 biinda. 

 H. Similar to the last but with large seeds ; flowers often double. 

 Parkman's Crab — Pyrus Halli3,na. 

 * Flowers and small fruit in terminal compound clusters, cymes ; 

 shrubs to 12 feet. Chokeberries — Aronia. (I.) 

 I. Lower side of leaves and flower-clusters woolly ; fruit red, 

 remaining through the winter. Red Chokeberrt (282) — 

 Pyrus arbutifblia. 

 I. Leaves and flower-clusters nearly smooth ; fruit black, ripe in 

 Sept. and soon falling. Black Chokeberrt — Pyrus melanocirpa 

 (P. nigra). 

 I. Like the last, but with purple fruit. Purple Chokeberrt — 

 Pyrus atropurpurea. 



S6rbus. Shrubs with compound leaves (the first species has fully 

 separated blades only at base) and terminal clusters of small red fruit. 

 The Mountain Ashes are generally tree-like in form and size, some 

 reaching the height of 40 or 50 ft. [Seeds.] 



KEY TO THE MORE SHRUBBY MOUNTAIN ASHES 



* Leaves compound only at base with tips deeply notched ; shrub or 



small tree to 15 feet. A hybrid form sold under many names. 

 Pyrus (Sorbus) spiiria. 



* Leaves fully pinnate. (A.) 



A. Leaves with 7-15 sharply serrate but rather blunt blades dark 

 green above, pale beneath, IJ-^ inches long ; winter buds gluti- 

 nous and almost free from hairs. Western Mountain Ash — 

 Pyrus sitch^nsis (P. (Sorbus) sambucifblia) . 



A. Leaves with 11-15 long-pointed blades about 2 inches long; 

 winter buds with long white hairs ; branchlets red, glossy and 

 smooth. Pyrus (Sorbus) thianschanica. 



Calycdnthus (or Butnferia). The Sweet-scented Shrubs or Caro- 

 lina Allspices are popular shrubs much cultivated for their sweet- 

 scented purple or reddish brown flowers in spring or early summer. The 

 leaves are large, entire-margined, and opposite. The flowers have many 



