ROSACES. 71 



ously stalked. Lower surface of the leaflets hairy and glan- 

 dular. Flowers racemed, numerous, large and white. Fruit 

 oblong, black. Var. fPOHd.OSUS is smoother and less glandu- 

 lar. Var. humifusUS is trailing and smaller, and the flowers 

 are less numerous. Borders of thickets. 



8. R. Canaden'sis, L. (Low BLACKBERRY. DEWBERRY.) 

 Stem shrubby, extensively trailing, slightly prickly. Leaflets 

 chiefly 3, oval or ovate-lanceolate, nearly smooth, sharply 

 serrate. Flowers in racemes. Thickets and rocky hills. 



9. R. his'pidus, L. , (EUNNING SWAMP-BLACKBERRY) occurs 

 occasionally in low meadows. Stem prostrate, with small 

 reflexed prickles, sending up at intervals the short flowering 

 shoots. Leaflets mostly 3, smooth and shining. Fruit of 

 few grains, red or purple. 



14. ROSA, Tourn. ROSE. 

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



1. R. SCtig'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. 



** Styles separate, included within the calyx-tube; sepals spreading 

 after flowering , and deciduous. 



2. R. Caroli'na, L. (SWAMP ROSE.) Stem 1-7 feet high, 

 erect, armed with stout straight or somewhat curved prickles. 

 Leaflets 5-9, very finely serrate, mostly narrowly oblong. 

 Stipules long and very narrow. Flowers in corymbs, numer- 

 ous. Calyx and globular calyx-tube beset with glandular 

 bristles. Wet places, Ontario. 



3. R. lu'eida, Ehrhart. Stem 1-6 feet high, armed with 

 stout more or less hooked prickles. Leaflets 5-9, coarsely 

 serrate, smooth and often shining above, rather thick. Ped- 

 uncles 1-3-flowered. Dry soil, or borders of swamps, chiefly 

 eastward. 



4. R. hu' mills, Marsh. Low, more slender and less leafy 

 than the last, with straight slender spines. Stipules nar- 

 row. Leaflets thin and pale. Outer sepals always more or 

 less lobed. Mostly in sandy soil. 



