THE NURSERY-LIST 367 



N. alata var. grandiflora ( N. affinis of gardens) propagates by root- 

 cuttings. Tobacco is handled essentially like tomato plants. 



Nidularium. Bromdiaceoe. 



Propagation by suckers. These should be placed in small pots in 

 compost of light porous material with broken crocks or charcoal 

 added for drainage. Place under frame with bottom heat and a 

 humid atmosphere. See Bromeliacece, page 259. 



Nierembergia. Solanacece. 



Grown from seeds, which are sold by seedsmen. Cuttings of firm 

 shoots in fall are also used. N. riwlaris is most readily increased 

 by dividing the creeping stem where it has rooted at the nodes. 



Nigella (Fennel-Flower. Love-in-a-Mist). Ranunculacece. 

 Annuals, grown readily from seeds sown early in the open. 



Nolana. Nolanaceoe. 



Raised from seeds sown in the open border ; for early blooming 

 they should be started under glass. 



Nolina. LiliacecB. 



Increased by seeds imported from their native country; by 

 cuttings, when obtainable ; usually, however, by offsets. 



Nuphar. Nymphaeaceos. 



Propagated the same as nelumbo and nymphsea, which see. 

 See also Nymphceaceoe. 



Nyctocereus. Cactacea. 



For propagation, see Cacti, page 261. 



Nymphaea, Castalia (Water Lily. Lotus). Nymph&aceGe. 



Propagated by 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 rootstocks, which are used for propagation. 



Nymphaeaceae. Water Lilies. 



All plants belonging to this family are readily increased from seeds. 

 The seeds should be sown in pots or boxes of loamy soil and sand, 

 submerged in a tank or tub of water, and placed in a sunny position. 



