POMACEAE 175' 



Ijeaf-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. 

 I,eaf-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 Servicb-berry. 

 (Man. p. 517 ; I. F. /. igS^-) In dry woodlands, Newf. to Out., Fla. and 

 La. — Pennsylvania . Monroe ; Northampton ; SchdyIvKIi,i< ; Ches- 

 ter ; Lancaster ; Franklin ; Tioga ; Allegheny ; Erie. 



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

 I. P. /. igS6.) 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./. 7957.) In dry rocky places, N. Y. to N. C— Pennsylvania r 

 MoNRoE ; Northampton ; Bucks ; Franklin ; Somerset ; Alle- 

 gheny. 



4. Amelanchier oligocarpa (Micbx.) Roem. Oblong-FRUiTBd JUNE- 

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

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

 kill. 



6. CRATAEGUS L. 



A. Corymbs each with many flowers. 

 Leaf-blades oblanceolate, spatulate or narrowly obovate. 

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



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



i. C. punctata. 

 Leaf-blades ovate, oval or suborbicular. 

 Leaves, pedicels and calyx glabrous or essentially so. 

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



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. pfuinosa. 



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. 8. C. coccinea. 



Leaf -blades narrowed at the base. 

 Fruit 8-14 mm. in diameter. 



Fruit globular or oval : leaf-blades firm. 9. C. rotundifolia. 



Fruit pyriform : leaf-blades thin. 10. C. tenuifolia. 



Fruit 6-8 mm. in diameter. 11. C. macracantha. 



Leaves manifestly pubescent, sometimes "mainly along the veins on. 

 the lower side of the blade. 



