THE BOOK OP ROSES. 133 



IV. Rosa Spinosissima. 

 Burnet-leafed Rose. 

 Scotch Rose. 

 Rosa Dumensis. 

 Rosa Campestris Odora. 

 Rosa Prcecox Spinosa. 

 Rosa Pimpinellifolia. 



Shrub, low, compact, dark, sometimes reddish, with 



trailing roots. 

 Branches, much ramified; short, thick, covered with 



bristles and thorns. 



Thorns, thick, uneven, sometimes scythe-shaped. 

 Leaves, springing in fasces, composed of seven leaflets. 

 Leaflets, flat, pale green, simply toothed; nearly or- 



bicular. 

 Flowers, solitary, small, cup-shaped, with emarginated 



concave petals; white, with yellowish base; if 



occasionally clustered, having floral leaves. 

 Flowerstalk, naked or bristly, and glandulous. 

 Sepals, short, entire, smooth or glandulous ; connivent 



or displayed. 



Tube of calyx, naked, oval, or nearly round. 

 Disk, thin. 



Styles, detached, hairy. 

 Fruit, oval or nearly round; of a blackish brown; 



crowned with sepals. 



This rose grows in abundance throughout Europe. 



1. Sarmentous Rose. 



Rosa Viminea. 

 Shrub, spreading. 

 Branches, long, feeble.flexile, covered with bristly thorns. 



