MALACEAE (APPLE FAMILY) 133 



A. Leaves pinnately compound. SORBUS (p. 133) 



AA. Leaves simple. 



B. Leaves linear-lanceolate to oblanceolate; plant 1-2 m. high; flowers -1-2 in 

 a cluster. E. (Apparently. Gk. per = through, a = without, phyllon = a 

 leaf; hence through-absence-of-leaves.) Peraphyllum ramosissimum 



BB. Leaves wider; plant usually taller; flower clusters usually larger. 

 C. Smaller branches with stout thorns; flowers in corymbs; fruit with stony 

 carpels. CRATAEGUS (p. 134) 



CC. Plant without thorns; fruit with papery carpels. 



D. Flowers in corymbs; fruit yellowish green to red, having the appearance 



of an apple. PYRUS (p. 133) 



DD. Flowers in racemes; fruit black or purplish, having the appearance of a 



berry. AMELANCHIER (p. 133) 



SORBUS (MOUNTAIN ASH) 



Shrubs or small trees. Leaves odd-pinnate, deciduous. Flowers small, 

 in terminal compound cymes. Carpels 3-5, coriaceous, i-seeded. Fruit 

 small, globose or pyriform. (A Latin name for the service tree, Pyrus 

 domes tica.) 



A. Leaflets dull, serrate only near the apex; fruit purple, glaucous. W. C. E. 



S. occidentalis 

 AA. Leaflets shining, serrate from near the base; fruit coral-red. W. C. E. 



S. sitchensis 



PYRUS (APPLE) 



Trees, small. Leaves deciduous, more or less serrate, sometimes some- 

 what 3-lobed in ours. Flowers white to pink. Calyx tube urn-shaped. 

 Styles 5, more or less united at base. Carpels 5, 2 -seeded, wholly covered 

 by the adnate calyx tube. Fruit globose or oblong or pyriform, depressed 

 at both ends, acid. (The Latin name of the pear.) 



A. Fruit widest between the middle and the stem end, without grit cells. 

 B. Leaves often somewhat 3-lobed, white-pubescent beneath; fruit 8-12 mm. wide, 

 15-20 mm. long. W. P. rivularis (WILD CRAB APPLE) 



BB. Leaves not lobed; fruit larger. 



C. Leaves glabrate; calyx lobes glabrate outside; fruit 3 cm. or less wide. W. E. 



P. baccata (SIBERIAN CRAB) 



CC. Leaves white-pubescent beneath; calyx lobes white-pubescent outside; fruit 



mostly larger. W. E. Many varieties. P. malus (CULTIVATED APPLE) 



AA. Fruit widest between the middle and the flower end, with grit cells. W. E. 



Many varieties. P. communis (CULTIVATED PEAR) 



AMELANCHIER (SERVICE BERRY) 



Shrubs or small trees. Flowers white, in small racemes. Styles 3-5. 

 Carpels 3-5, incompletely 2-celled by a partition from the back, i -seeded, 

 wholly covered by the adherent calyx. Fruit small, berry-like, black or 

 purplish, edible, sweet. (The French name for a cultivated Hawthorn.) 

 Fruit edible. 



