ROSACEAE. pg 



1. Leaves entire. D. integrifolia. 

 Leaves cfenately serrate. 2. 



2. Flowers white : sepals narrow. D. octopetala. 

 Flowers yellow ; sepals ovate. D. Drummondii. 



RUBUS. Bramble. 



Tardily deciduous mostly prickly shrubs with moderately 

 slender more or less angular twigs ; continuous pith of corre- 

 sponding shape; alternate raised torn petiole-bases rather than 

 distinct leaf-scars ; no stipule-scars ; ovoid sometimes superposed 

 buds with several exposed scales ; simple or mostly compound 

 often toothed petioled leaves ; conspicuous perfect usually clus- 

 tered polypetalous perigynous flowers ; and small drupe-like 

 fruits in a cluster which breaks away from each persistent calyx 

 with the end of the receptacle (blackberries), or separates from 

 this, thimble-like (raspberries). 



1. Leaves simple : bark shredding : branches bristly, 



without prickles. (Flowering raspberries). 2. 

 Leaves compound : bark not shredding. 4. 



2. Flowers white. 3. 



Flowers magenta. R. odoratus. 



3. Flowers usually solitary. R. deliciosus. 

 Flowers usually several in a cluster. R. parviflorus. 



4. Leaflets 5-15, distinctly pinnate. (Flowering brambles). 5. 

 Leaflets 3-5, nearly or quite palmate. 6. 



5. Flowers single. R. rosaefolius. 

 Flowers double. R. rosaefolius coronarius. 



6. Leaves white beneath: fruit thimble-like. (Rasp- 



berries). 7. 

 Leaves not white: fruit solid, n. 



7. Stems with glandular hairs. R. phoenicolasius. 

 Stems not red-hairy. 8. 



8. Stems with bristles and also somewhat prickly. 9. 

 Stems prickly but scarcely bristly. 10. 



9. Fruit red. R. strigosus. 

 Fruit amber. R. strigosus albus. 



