DOG ROSE 167 



Common Dog Rose is found in every part of Great Britain, N. to 

 the Orkneys, and ascends to 1350 ft. in Yorkshire. It is native in 

 Ireland and the Channel Islands. 



The Dog Rose is one of those flowers that help to call up memories 

 of pleasant rambles along the highway, and is one of the greatest 

 ornaments of our wayside hedges, in fields removed from the roads, 

 and in isolated bushes, as well as on commons and heaths. 



It forms a certain proportion of the undergrowth in brakes and 

 thickets or woods. 



A prickly climbing shrub, the Dog Rose is a tall, arching bush, 

 with a green or purple stem, armed with strong, equal, curved-back 

 prickles, which serve as a protection and for climbing, smooth, shiny, 

 with simply or doubly coarsely-toothed, rigid leaflets, the leaves being 

 arranged each side of a stalk, egg-shaped, coarsely-toothed, the upper 

 surface shining, the lower mostly smooth or hairy. 



The Dog Rose has the shrub habit. It is a large bush, with long, 

 spreading, arching branches. The prickles are scattered, uniform, 

 stout, broad, equal -hooked, the base thickened. The leaves are 

 pinnate. The leaflets are hairless, simply -toothed, the secondary 

 nerves not glandular, acute, flat, or keeled. 



The leaf-buds consist of scales with 3 projections at the tip, which 

 are the leaf bases, and the stipules and upper part of the leaf are the 

 3 projecting points. The outer scale is the shortest. 



Everyone welcomes the appearance of the first Dog Rose in flower 

 in summer. The flower varies from white to pink. In this it is a 

 whitish-pink. The sepals are unequal, owing perhaps to the arrange- 

 ment of the leaves in the bud. The edges of two are covered, two are 

 not, and in the fifth, one side is and the other not covered, and the 

 uncovered edges are bearded. 



The sepals are naked, bent back, pinnate, falling, 5, free, on the 

 rim of an egg-shaped receptacular tube. The disk is flat, the mouth 

 conspicuous. The flower-stalks are usually naked. The styles are 

 distinctly hairy, free, or nearly free. The fruit is egg-shaped to 

 pitcher-shaped, roundish, the numerous achenes being included in the 

 scarlet hip or receptacular tube which serves in the place of a pericarp. 



There are numerous i -seeded carpels, which are clothed in long 

 hairs, sunk in the receptacle, which is globular, open at the apex. 



The Dog Rose attains a height of 8-10 ft. It begins to flower in 

 June and continues in July. It is a perennial, deciduous shrub. 



The flowers are conspicuous, wide open, and scented, and there is 

 abundant pollen, but no honey. The flowers are homogamous, the 



