ROSACES. 73 



Spines. Peduncles and calyx glandular. Leaves rather 

 thin, roundish-ovate, on slender petioles ; acutely glandular- 

 toothed, sometimes cut-lobed. Fruit bright red, globose or 

 obovate, half an inch broad. Thickets, common. 



Var. maeraeantha, Dudley, (C. tomentosa, L. in part) 

 has longer spines and thicker leaves, wedge-shaped at the 

 base, on stout petioles and often deeply cut. The cymes 

 also are broader and the flowers and fruit rather large. 

 Thickets. 



Var. mollis, Torr. and Gray, (C. tomentosa, L., var. mollis, 

 Gray) has densely pubescent shoots and large slender- 

 petioled leaves, usually with acute narrow lobes. Fruit 

 bright scarlet with a slight bloom, an inch broad. Queens- 

 ton and westward along Lake Erie. 



2. C. puneta'ta, Jacq. Not glandular. Branches hori- 

 zontal. Leaves rather small, wedge-obovate, tapering and 

 entire below, unequally toothed above, villous-pubescent 

 when young, not shining. Fruit globose, about an inch 

 broad. 



3. C. Crus'galli, L. (COCKSPUR THORN.) A shrub or low 

 tree, glabrous. Leaves thick, shining above, wedge-obovate, 

 finely serrate. Petioles very short. Fruit globular, dull 

 red, J of an inch broad. Thorns very long. Thickets, 

 south-western Ontario. 



4. C, Douglasii, Lindl. , has few short and stout spines, 

 ovate thin doubly serrate leaves, and small black-purple 

 fruit. N.W. prairies. 



16. PYRUS, L. PEAR. APPLE. 



1. P. eorona'ria, L. (AMERICAN CRAB- APPLE.) A small 

 tree, with ovate serrate simple leaves, tomentose beneath. 

 Flowers in umbel-like cymes. Styles woolly and cohering 

 at the base. Fruit a greenish apple. Toronto and west- 

 ward. 



2. P. arbutifo'lia, L. (CHOKE-BERRY.) A shrub, with 

 oblong or oblanceolate finely serrate simple leaves, tomentose 



