Genus 4. 



APPLE FAMILY, 



2. Aronia atropurpurea Britton. 



Purple-fruited Choke-berry. 



Fig. 2327. 



Aronia atropurpurea Britton, Man. 517. 1901. 



Pyrus arbutifolia vat. atropurpurea Robinson, 

 Rhodora 10: zi. 1908. 



A shrub, sometimes 12° high, usually 

 taller than the other species. Calyx, pedi- 

 cels and lower leaf-surfaces tomentose; 

 leaves oval to obovate ; calyx-lobes gland- 

 less, or with very few glands ; fruit oval 

 to globose, purple-black, 3"-s" long, per- 

 sistent into late autumn. 



Wet grounds, especially shaded swamps, 

 Newfoundland to Ontario, Michigan and Vir- 

 ginia, perhaps extending south to Florida. 

 April-June. 



3. Aronia melanocarpa (Michx.) Britton. 



Black Chokeberr)'. Chokepear. 



Fig. 2328. 



Sp. PI. 2 : 1013. 

 Michx. Fl. Bor. 



Leaves 



Mespilus arbutifolia van nigra Willd. 



I'Soo. 

 Mespilus arbutifolia var. melanocarpa 



Am. I : 292. 1803. 

 Pyrus melanocarpa Willd. Enum. 525. 1809. 

 Pyrus nigra Sargent, Gard. & For. 3: 416. 1891 

 Aronia nigra Britton, Mem. Torr. Club 5: 182. 



A shrub resembling the preceding species, 

 obovate or oval, obtuse, acute or abruptly acuminate 

 at the apex, narrowed or cuneate at the base, short- 

 petioled, crenulate, dark green above, paler beneath, 

 glabrous or nearly so on both surfaces; flowers simi- 

 lar to the preceding; calyx and pedicels nearly gla- 

 brous; calyx-lobes glandular; fruit globose or oval, 

 nearly black, or purplish black, 3"-4-" in diameter, 

 early deciduous. 



In swamps or low woods, or sometimes in drier soil. 

 Nova Scotia to western Ontario, south to Florida and 

 Michigan. Ascends to 6000 ft. in North Carolina. 

 March-June. 



5. AMELANCHIER Medic. Phil. Bot. i: 155. 1789. 



Shrubs or trees, with alternate simple petioled serrate or entire leaves, unarmed branches, 

 and racemose or rarely solitary white flowers. Calyx-tube campanulatf , more or less adnate 

 to the ovary, 5-lobed, the lobes narrow, reflexed, persistent. Petals 5. Stamens =«, inserted 

 on the throat of the calyx; filaments subulate; styles 2-5, connate, pubescent .at the base. 

 Ovary wholly or partly inferior, its cavities becoming twice as many as the styles ; ovule i 

 in each cavity, erect. Pome small, berry-like, 4-10-celled. Testa of the seed cartilaginous. 

 [The Savoy name of the Medlar.] 



A genus of about 25 species, natives of the north temperate zone. Besides the following, some 

 12 others occur in western North America and i in Mexico. Type species : Mespilus amelanchier L. 



The species apparently consist of many races, diiTering in size, in pubescence, and in size of 

 flowers and fruit. Hybrids are also supposed to exist. 

 Flowers several or numerous in the racemes ; pome globose. 



Glabrous or pubescent trees and shrubs ; leaves usually serrate nearly all around. 

 Leaves acute or acuminate at the apex ; top of the ovary glabrous or nearly so. 



Leaves ovate or ovate-lanceolate, usually glabrous when mature ; base cordate or rounded ; 



petals narrowly oblong. i. A. canadensis. 



Leaves oblong, oval, ovate or obovate, rarely subcordate at base, densely white-woolly 

 beneath, at least when young, petals oblong to obovate. 2. A. intermedia. 



Leaves rounded, obtuse or subacute at the apex ; top of the ovary woolly. 



Low shrub of rocky places, i°-3° high ; petals 2"-4" long. 3. A. spicata. 



Tree or small shrub ; petals 5"-8" long ; leaves coarsely toothed. 4. A. sanguivea. 



Glabrous western shrub ; leaves dentate above the middle only. 5. A-, alnifolia. 



Flowers only 1-4 in the clusters ; pome oblong or obovoid. 6. A.Bartramiana. 



