26 ROSACEAE 



Cydonia — Cjuince 



(L. cydonia, quince, from Cydonia, a town of Crete) 

 Flowers typically scarlet red, in 2-6-flowered clusters, appearing before the 

 leaves C. japdnica 



Malus — Apple 



(L. malus, apple-tree) 



1. Leaves and outer surface of sepals glabrate; cultivated shrubs or trees 



a. Leaves thick; flowers very numerous; fruit 1-1.2 cm. or less, red M.floribinda 



1). Leaves thin; flowers less numerous; fruit 1.5-2.5 cm., yellow M.baccata 



2. Leaves and outer surface of sepals persistently tomentose ; native or 



cultivated trees 



a. Leaves rounded or cordate at the base; pome 5-10 cm. in diameter; 



cultivated M. silvestris 



b. Leaves mostly narrowed at the base ; pome 2.5-3.5 cm. in diameter ; 



native .1/. ioensis 



Amelanchier — June-berry, Service-berry 



(The Savoy name) 

 PI. 10, fig. E : 1, 2 



1. Petals narrowly oblong, 14-25 mm. long; leaves finely and sharply 



serrate A. canadensis 



2. Petals oblong to obovate, 4-12 mm. long 



a. Flowers in 5-many-flowered racemes ; leaves obtuse or cordate at 



the base 



(1) Leaves oblong, finely serrate; blossoming April 10-May 15 A. oblongi folia 



(2) Leaves oval; blossoming May 15-25 A. spiedta 



b. Flowers 1-4, in terminal clusters ; leaves acute or somewhat wedge- 



shaped at the base A. oligocdrpa 



Crataegus — Thorn, Hawthorn 



(Gr. krataeg-os, a thorn) 



1. Leaves ovate, elliptic-ovate or nearly orbicular in outline, mostly lobed, 



more than 4 cm. wide 



a. Leaves cordate to truncate at the base, densely tomentose below ; 



fruit pubescent C. mollis 



b. Leaves cuneate at the base, glabrous or pubescent ; fruit glabrous 



(1) Leaves ovate-orbicular, coarsely serrate, glabrous on both sides C.rotundifolia 



(2) Leaves rhombic-elliptic, pubescent at least on the veins beneath, 



coarsely serrate 



(a) Leaves coriaceous, dark green and shining above C. macracdntha 



(b) Leaves thin, dull green, pubescent and with impressed veins 



above C. tomentosa 



2. Leaves obovate, oblanceolate, or spatulate, slightly or not all lobed, 



mostly 2-4 cm. wide 



a. Leaves dull, gray-green, pubescent C. punctata 



b. Leaves bright green, glabrous and shining C. crus-gdlli 



Cotoneaster — Fire Thorn 



(Name New Latin, signifying quince-star) 

 Flowers cymose, small and white; leaves leathery and sometimes evergreen C. acutifolia 



Aronia — Chokeberry 



(L. aronia, formed from aria, the beam-tree) 

 Flowers white or pink, in terminal compound cymes A. nigra 



Primus — Plum, Cherry 



(Classical L. name of the plum-tree) 

 PI. 10, fig. F : 1, 2 

 1. Flowers single (not filled) Cherries and Plums 

 a. Large shrubs or trees 



(1) Flowers in racemes, terminating the season's growth 



(a) Small tree or large shrub; leaves broadly ovate P.virginidna 



(b) Large tree ; leaves narrowly ovate or lanceolate P. serotina 



