ROSACES. 45 



4. R. rubigino'sa, L. (SWEET-BRIER. ) Stem tall. Prickles 

 numerous, the larger hooked, the smaller awl-shaped. Leaflets 

 5-7, doubly serrate, glandular beneath. Flowers mostly solitary. 

 Fruit pear-shaped or obovate. Roadsides and fields. 



* * Styles cohering in a protruding column, as long as the stamens. 



5. R. setig'era, Michx. Stem climbing. Prickles nearly 

 straight. Leaflets 3-5, ovate. Petals deep rose-coloured, changing 

 to white. Borders of thickets and along fences; south-western 

 Ontario. 



13. CRAT^E'GUS, L. HAWTHORN. 



1. C. COCCin'ea, L. (SCARLET- FRUITED THORN.) A low tree, 

 glabrous. Leaves rather thin, roundish-ovate, serrate, on slender 

 petioles. Fruit bright red, ovoid, hardly edible. Thickets. 



2. C. tomento'sa, L. (BLACK or PEAR THORN.) A tall shrub 

 or low tree, downy, at least when young. Leaves thickish, oval 

 or broadly ovate, finely serrate, on margined petioles, furrowed 

 along the veins. Fruit globular or pear-shaped, larger than in 

 No. 1, edible. Thickets. 



3. C. Crus-galli, L. (COCKSPUR THORX.) A shrub or low 

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

 serrate. Petioles vert/ short. Fruit globular, bright red. Thorns 

 very long. Thickets. 



13. PYRUS, L. PEAB. APPLE. 



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

 with ovate serrate simple leaves. Flowers in umbel-like cymes. 

 Styles woolly and cohering at the base. Fruit a greenish apple. 

 Chiefly west of Toronto. 



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

 finely serrate simple leaves. Flowers in compound cymes. Fruit 

 berry-like, nearly globular, dark red or black. Swamps. 



3. P. America'na, DC. (AMERICAN MOUNTAIN ASH.) A small 

 tree, with odd-pinnate leaves of 13-15 leaflets, the latter lanceolate, 

 taper-pointed, sharply serrate, bright green. Fruit scarlet, berry- 

 like. Flowers in flat cymes. Swamps and cool woods, northward. 



11. AMELAN'CHIER, Medic. JuNE-B E RRY. 

 A. Canaden'sis, Torr. and Gray. (SHADBUSH.) A shrub or 

 small tree, with a purplish, berry-like, edible fruit. The variety 



