454 JOURNAL OK THE ROYAL HORTICULTURAL SOCIETY. 



lowers tctramerous ; styles free, exserted ; inflorescence one-ttowered ; sepals erect 

 again after flowering, persistent upon the receptacle ; stems erect ; thorns straight, 



regularly in pairs under the leaves XI. Sericese. 



Example: B. sericea, 



Middle leaves 7-foliate ; sepals again erect, entire, persistent; ovaries inserted ex- 

 clusively at the bottom of the receptacle ; inflorescence one-flowered, ebracteate ; 

 upper stipules with auricles very dilated and divergent ; steins erect ; thorns 

 slender, straight, alternate, intermixed with numerous prickles. 



Example: R. minutifolia. XII. Minutifolise. 



Middle leaves 9-foliate ; sepals reflexed, entire, caducous ; disc very large ; stamens 

 very many ; inflorescence several-flowered, with large and incised bracts ; stipules 

 shortly adnate, deeply pectinate ; stems erect, somewhat sarmentous ; thorns 

 hooked or straight, regularly in pairs below the leaves, intermixed or not with 



prickles 



Examples 



R. bractcata, cUnopJq/lla. 



. XIII. Braeteatse. 



stamens many ; inflorescence one- 

 at last caducous ; stems long and 



. XIV. Lsevig-atse. 



( Leaves trifoliate, sepals again erect ; disc large 

 flowered, ebracteate ; stipules nearly free, 

 sarmentous, climbing or creeping 



Example : R. hcvigata (Rose Camellia). 



Middle leaves 11-13-15-foliate ; sepals again erect, persistent, the extremities strongly 

 appendiculate ; ovaries inserted exclusively upon a projection at the bottom of 

 the receptacle ; inflorescence usually several-flowered ; stems erect ; thorns 

 straight, regularly in pairs, below the leaves . . XV. Mierophyllse. 

 Example: R. microphylla. 



Leaf simple instead of being composed of several leaflets, exstipulate (the single 

 species of this section has formed the genus Hulthc.mia, a name but little used 

 in horticulture) XVI. Simplicifolise. 



Example: R. berberifolia. 



