280 THE NURSERY LIST. 



Nuphar. Propagated same as Nelumbo and Nymphaea, 

 which see. 



Nutmeg. See Myristica. 

 Nuttallia. Rosacece. 



May be propagated by seeds ; by divisions ; by means 

 of suckers, which spring from the roots. 



Nut-trees. See the various genera, as Almond, Chestnut, 

 Hicoria, Juglans and Pecan. 



Nymphaea, Castalia (Water Lily, Lotus). NymphaacetK. 



Seeds, which are rolled up in a ball of clay and dropped 

 into a pond, or sown in pots which are then submerged in 

 shallow water, either indoors or out. Usually increased 

 by portions of the rootstocks, which are sunk in the pond 

 and held by stones, or the tender species placed inside, in 

 pans of water. Some species produce tubers on the root- 

 stocks, which are used for propagation. 



Nyssa (Pepperidge, Sour Gum, Tupelo-tree). Cornacece. 



Increased by seeds and by layers. The seeds should be 

 sown as soon as ripe or else stratified. They usually lie 

 dormant the first year. 



Oak. See Quercus. 

 Obeliscaria. See Rudbeckia. 

 Ochna. Ochnacecz. 



During summer, cuttings may be made of growing 

 shoots. 



Odontoglossum. Orchidacece. 



Division. See also under Orchids. 



(Enothera, including Godetia (Evening Primrose). Ona- 



grace<z. 



Seeds may be sown in spring or summer. Divisions 

 may be made. Cuttings of perennials should be placed 

 in a cool frame in the early part of the season before flow- 

 ering begins. 



Okra, Gumbo (Hibiscus esculentus}. Malvaceae. 



Seeds, sown where the plants are to stand,, or started in 

 pots often in the north. 



Olax. Olacine&. 



Grown from cuttings of firm or mature shoots in heat. 



