164 ROSE ORDER 



in each cell, styles 1-5, fruit a pome, i. e. the fleshy calyx-tube enclosing 

 the bony, papery or leathery pistils or carpels; flowers regular, perfect, 

 solitary or in racemes or cymes ; trees or shrubs .with alternate, simple or 

 pinnate leaves. 



1. Leaves simple 



a. Flowers solitary, or in racemes or in 2-3-flow- 



ered umbels 



(1) Leaves oblong-ovate or round; flowers 



white AMELANCHIER 



(2) Leaves linear-oblanceolate ; flowers pink PERAPHYLLUM 



b. Flowers in corymbs ; leaves double-toothed or 



3-5-lobed CRATAEGUS 



2. Leaves pinnate; flowers in compound cymes SORBUS 



AMELANCHIER Linne 1753 JUNEBERRY 

 (The Savoy name) 



PI. 26, fig. 10. 



Sepals 5, united into a bell-shaped tube, somewhat fused with the 

 ovary, petals 5, white, stamens many, inserted on the throat of the calyx, 

 styles 2-5, united, ovary wholly or partly inferior, 4-10-celled, fruit a small 

 4-10-celled berry-like pome ; flowers in racemes or rarely solitary ; leaves 

 alternate, simple, serrate or entire; shrub or tree. 

 Stems 1-12 ft. high; leaves entire or serrate, smooth 



or hairy A. alnifolia 



CRATAEGUS Linne 1753 HAWTHORN 

 (Gr. krataigos, hawthorn, from krataios, tough, strong) 



PL 26, fig. 11. 



Sepals 5, united into a cup- or bell-shaped tube, fused with the ovary, 

 petals 5, white or pink, inserted on the calyx, stamens many, ovary inferior 

 or nearly so, 1-5-celled, styles 1-5, fruit a small, drupe-like pome, contain- 

 ing 1-5 bony carpels, each usually 1-seeded; flowers in terminal corymbs; 

 leaves alternate, doubly toothed, lobed or pinnatifid; trees or shrubs. 

 Shrubs or trees, 5-30 ft. high; leaves broadly spatu- 

 late to obovoid, usually with sharp or round shallow 

 lobes, finely toothed, 1-3 in. long, .5-2 in. wide C. rimildris 



PERAPHYLLUM Nuttall 1838 

 (Gr. pera, leather pouch, phyllon, leaf) 



PI. 26, fig. 12. 

 Sepals 5, united, petals 5, pink, stamens many, inserted with the petals 



