172 DOG ROSE: SWEET-BRIAR 



Venation pinnate-looped ; about half-a-dozen fairly 

 strong secondaries leave each side of the midrib at wide 

 angles about 70 and soon curve forward, forming more 

 or less distinct loops. Tertiaries numerous, at acute angles 

 from the outer sides of the secondaries, and rapidly 

 forming an extremely fine network. Secondaries about 

 ^ i the length of the midrib apart. 



[Rosa canina is very variable as regards pubescence, 

 glands on the venation, bristles, and strength and curva- 

 ture of prickles ; the simple or double serrature and shapes 

 of the leaflets, &c., and a number of sub-species and 

 varieties are described. 



The rule is that it is distinguished from R. spino- 

 sissima by the hooked prickles and large arching shoots 

 bearing leaves with smaller and more numerous leaflets ; 

 from R. rubiginosa by the lack of glandular hairs on its 

 leaf-surfaces and absence of fragrance ; from R. villosa by 

 the stouter curved prickles and want of distinct down; 

 and from R. arvensis by its less trailing habit.] 



7 /H7 Leaflets fragrant, owing to numerous 

 glandular hairs on the under-surface, 

 bi-serrate. 



Rosa rubiginosa, L. Sweet-briar, Eglantine. Tufted 

 bush, the shoots often rusty from the crowded glandular 

 hairs. Leaflets small, oval or sub-orbicular, with rounded 

 base, acute or obtuse, shining above. Bristles and glandu- 

 lar hairs often intermingled with the hooked prickles. 

 Venation as in R. canina', leaves purplish brown in autumn. 



Prickles slender and straight, setaceous, not 

 dilated below. 



l~~l Leaflets 7 9, small, elliptic or rounded, 

 obtuse, serrate, glabrous and eglandular, 

 or nearly so. Prickles very unequal. 



