TREES IN SCOTLAND 183 



Rhododendrons that thrive and flower well here. 

 No other shrubs give such a long and varied flower 

 display. 



RlBES. JR. alpinum, aureum, and rubrum. R. san- 

 guineum* and its varieties are the principal ornamental 

 currants. 



ROBINIA PSEUDACACIA.* An elegant foliage tree, 

 and usually the last to break into leaf. 



ROSA. Practically all the Tea and Hybrid Per- 

 petual Roses can be grown, if sheltered spots are 

 chosen and the plants grown as dwarfs. However, 

 the stronger varieties are the most satisfactory ones, 

 and in bad seasons it is July before they commence 

 to flower, although September has well advanced 

 before they cease. The hybrid Sweet Briars are the 

 freest of all to grow. Groups form thickets of 

 foliage which are almost hidden with blossom. 

 Rosa wichuraiana covers banks, or anything somewhat 

 flat, in a very short time. It flowers through Sep- 

 tember, and attracts great attention. Such tender 

 Roses as Marechal Niel, Niphetos, and Banksian 

 are useless. 



ROSMARINUS OFFICINALIS (Rosemary). 



RUBUS. Of these, R. arcticus, dwarf ; R. lacinatus^ 

 R. nutkanus* R. deliciosus* is a beautiful shrub, and 

 should be left alone after planting. 



RUSCUS (Butcher's Broom). R. aculeatus and R. 

 Hypoglossum . 



SALIX (Willow). S. alba, babylonica (Babylonian 

 Willow), and penduta, a lovely tree. S. Caprea* (Goat 

 Willow), fragilisy herbacea (the Alpine Willow, not 



