ROSACEAE (ROSE FAMILY) 



8 HAMAMELIDACEAE. Witch Hazel Family. 



i HAMAMELIS WITCH HAZEL. (H. virginiana.) 



a LIQUIDAMBAR SWEET GUM. (L. styraciflua.) 



9 PLATANACEAE. Plane-tree Family. 

 i PLATANUS. 

 i a Flowering or fruiting heads solitary 



SYCAMORE. (P. occidentalis.) 

 b Flowering or fruiting heads usually 2-4 together 



ORIENTAL PLANE-TREE. (P. orientalis.*) 



10 ROSACEAE. Rose Family. 



1 OPULASTER NINEBARK. (O. opulifblius.) 



2 SPIRAfeA. 



1 a Flowers in dense panicles 2 



b Flowers not in panicles 4 



2 a Leaves not densely hairy beneath ; flowers usually white 



MEADOW-SWEET. (S. 'salicifblia.) 

 b Leaves hairy or woolly beneath ; flowers pink to purple 3 



3 a Shrub 2-4 ft. high; leaves ovate, brownish beneath 



HARDHACK. (S. tomentbsa.) 

 b Shrub 4-6 ft. high ; leaves oblong to lanceolate, whitish 



beneath BILLARD'S SPIREA. (S. billdrdii.) 



4 a Flowers usually pink, rarely whitish, in corymbs 5 



b Flowers white, in umbels or umbel-like racemes or 



in clusters 6 



5 a Branches more or less angled ; leaves not usually glau- 



cous beneath BUMALD'S SPIREA. (S. bumdlda.*) 



b Branches not angled; leaves glaucous beneath 



JAPANESE MEADOWSWEET. (S. japonica*) 



6 a Flowers in sessile umbels or in lateral clusters with no 



leaves subtending 7 



b Flowers in umbel-like racemes on leafy branches 9 



7 a Leaves entire or toothed only toward the apex, often 



3-veined, grayish-green 



HYPERICUM -LEAVED SPIREA. (S. hypericifblia*) 

 b Leaves toothed, usually many veined, bright green .... 8 



8 a Flowers usually double; flowers in clusters or sessile 



umbels BRIDAL WREATH. (S. prunifblia*) 



b Flowers not double; lower umbels sometimes stalked 



THUNBERG'S SPIREA. (S. argiita.*) 



9 a Stamens longer than the petals; branches angled 



GERMANDRA-LEAVED SPIREA. (S. chamaedry folia*) 

 b Stamens not longer than the petals ; branches not angled 10 

 :o a Leaves blunt at apex, often 3-lobed 



LOBED-LEAVED SPIREA. (S. trilobata*) 

 b Leaves pointed at apex, toothed 



VAN HOUTTE'S SPIREA. (S. van houttei*) 



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