232 SUMMER FLOWERS. 



flowers pink, usually solitary ; fruit ovoid or oblong, the pri- 

 mordial ones pear-shaped, smooth or rarely bearing a very 

 few small prickles. Sweetbriar. Hedges and thickets. Fl. 

 June, July. There are two or three forms of this Rose. 



** Stems without glandular spiny hairs (setae) . 

 t Leaves glandulose on their disk or surface. 



B. villosa : shrub ; erect, bushy, 3-6 feet high, the prickles 

 of the stem straight or but slightly curved; leaflets softly 

 downy on both sides, almost always doubly -toothed ; flowers 

 white or pale pink ; calyx-segments long, and often expanded 

 near the top, sometimes entire, sometimes pinnately lobed ; 

 fruit red, globular, covered with small fine prickles. Hedges 

 and thickets. PL June, July. There are several forms. 



ft Leaves without glands on their disk. 

 J Styles distinct. 



B. canina : shrub, stems of several years' duration, the first 

 year erect, simple, 3-4 feet high, the flowering stems of two or 

 more years branched, rather weak and straggling, 6-8 feet 

 long, glabrous, without glands, armed with curved or hooked 

 prickles ; leaflets five, sometimes seven, ovate, usually glabrous 

 and simply toothed, or downy on the under side and then 

 often doubly-toothed; flowers pink or white, sweet-scented, 

 solitary or 3-4 together at the ends of the branches; fruit 

 ovoid, without bristles, the calyx-lobes pinnate, deciduous 

 before the fruit is ripe. Hedges and thickets ; the commonest 

 of our Roses, and variable. Fl. June, July. 



JJ Styles united into a column. 



B. arvensis: shrub; stems long, trailing, often extending 

 many feet, with slender branches ; foliage and prickles nearly 

 as in the last, the prickles usually small and much hooked, 



