POMACEAE 175- 



Leaf-blades ovate or ovate-lanceolate, rounded or cordate at the base, gla- 

 brous at maturity. I. A. Canadensis. 

 Leaf-blades oblong, oval, ovate or obovate, rarely subcordate at the base, 

 densely white-woolly beneath at least when young. 2. A . Botryapium, 

 Leaf -blades rounded, obtuse or merely abruptly pointed at the apex : top of 

 the ovary woolly. 3. A. spicata. 

 B. Flowers in clusters : fruit oblong or obovoid. 4. A. oligocarpa. 



1. Amelanchier Canadensis (L.) Medic. June or Service-berry. 

 (Man. p. 517 ; I. F. f. 1985.) In dry woodlands, Newf. to Out., Fla. and 

 La. — Pennsylvania : Monroe ; Northampton ; Schuyi.kii.1. ; Ches- 

 ter ; Lancaster ; Franklin ; Tioga ; Ali^EGheny ; Erie. 



2. Amelanchier Botryapium (L. f.) DC. Shad-bush. (Man. p. 517 ; 

 I. F. /. /gS6.) In swamps and moist soil, N. B. to Man., Fla. and La. 

 — Pennsylvania : Northampton ; Lancaster ; Huntingdon ; Ve- 

 nango ; Allegheny. 



3. Amelanchier spicata (Lam.) Dec. Low June-berry. (Man. p. 

 517 ; I. F.y. 198/.) In dry rocky places, N. Y. to N. C. — Pennsylvania r 

 Monroe ; Northampton ; Bucks ; Franklin ; Somerset ; Ali.E- 

 gheny. 



4. Amelanchier oligocarpa (Michx.) Roem. Oblong-fruiTEd June- 

 BERRY. (Man. p. 518; I. F. /. 1990.) In cold swamps, or wet rocky 

 places, Lab. to Ont., Pa. and Mich. — Pemisylvania : Monroe ; Schuyl- 



KILI.. 



6. CRATAEGUS L. 



A. Corymbs each with many flowers. 



Leaf-blades oblanceolate, spatulate or narrowly obovate. 

 Leaves, pedicels and calyx glabrous. i. C. Cms-galli. 



Leaves, pedicels and calyx pubescent, copiously so when young. 



2. C. pnnctala. 

 Leaf-blades ovate, oval or suborbicular. 



Leaves, pedicels and calj-x glabrous or essentially so. 

 Leaf-blades truncate or cordate at the base. 3. C. cordaia. 



Leaf-blades narrowed at the base, often cuneately contracted. 



Leaf-blades deeply cleft : styles 1-3. 4. C. Oxyacantha. 



Leaf -blades serrate or shallowly incised : styles 5. 

 Leaf- blades firm, lustrous. 

 Fruit pyriform. 5- C. Porteri. 



Fruit oval or globose-oval. 6. C. Canbyi. 



Leaf-blades thin, dull. 7- C. Ptuinosa. 



Leaves, sometimes only on the lower surface and about the teeth, the pedi- 

 cels and calyx pubescent or glandular. 

 Leaves nearly glabrous. 

 Leaf-blades cordate or truncate at the base. 

 Leaf-blades narrowed at the base. 

 Fruit 8-14 mm. in diameter. 



Fruit globular or oval : leaf-blades firm. 

 Fruit pyriform : leaf-blades thin. 

 Fruit 6-8 mm. in diameter. 

 Leaves manifestly pubescent, sometimes mainly along the veins on. 

 the lower side of. the blade. 



