262 THE NURSERY-BOOK. 



Rhodotypos. See Kerria. 



Rhubarb. See Rheum. 



Rhus (Sumach). Anacardiacece. 



Seeds, layers, suckers, root-cuttings, and cuttings of green 

 of ripe wood. Suckers are oftenest used. 



Rhynchosia. Leguminosce. 



Propagated by seeds and division. 

 Rhynchospermum. See Trachelospermum. 

 Ribes (Currant, Gooseberry). Saxifragece. 



Seeds, which should be sown as soon as ripe, or else strati- 

 fied for new varieties. Commonly from ripe cuttings. See 

 Currant and Gooseberry. 



Richardia (Calla) Aroidece. 



Offsets, which should be removed and potted off when the 

 plants are at rest. 



Ricinus (Castor Bean). Euphorbiacece. 



Seeds, which in the north are started in-doors. 

 Rivina, Piercea (Hoop Withy). Phytolaccacece. 



Readily propagated by seeds ; also by cuttings, inserted 

 during spring in heat. 



Robinia (Locust, Rose Acacia). Leguminosce. 



Seeds, sown in fall or spring, and which usually germinate 

 better if soaked in hot water previous to sowing. Also 

 grown from layers and root-cuttings. Named varieties are 

 grafted or budded, the common locust stock {R. Pseudacacia) 

 being preferred, even for the rose acacia {R. fuspida). 



Rocambole (A Ilium Scorodoprasuni}. Liliacece. 



" Cloves," or divisions of the bulb. 

 Rocket, ornamental sorts. See Hesperis. 

 Rocket Salad (Eruca sativa). Crudferce. 



Seeds, sown where the plants are to grow. 

 Rock-Rose. See Cistus. 

 Romneya. Papaveraccce. 



-Propagated by seeds in spring. 

 Romulea. Iridece. 



Offsets. 



