ROSACEA. 73 



spines. Peduncles and calyx glandular. Leaves rather 

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

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

 obovate, half an inch broad. — Thickets, common. 



Var. macracantha, Dudley, (C tomenloaa, 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, 

 Graj') 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. (Cockspue 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. PYKUS, L. . Peak. Apple. 



1. P. eorona'Fia, L. (American Crab-Appij).) 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 



