QO'2 



CLENNYS HANDBOOK 



sion. N. lingua, X. pertusus, and N. rupestris are the prin- 

 cipal. 



NIPPLE CACTUS. See Mammillaria. 



NOLANA. [Nolanaceae.l Pretty annuals of prostrate 

 trailing habit, with Convolvulus-shaped blossoms. They may 

 be sown in the open ground in April and May ; or an earlier 

 crop, in pots for planting out, may be sown in March, and 

 the plants kept in a cold frame till the middle of May. They 

 will flourish in good light garden soil, and are increased by 

 seeds. 



NOTHOCHL^NA. [Polypodiace^.] Delicate but very 

 beautiful evergreen ferns, requiring a greenhouse. Soil, sandy 

 peat. Division. The plants must be carefully preserved 

 against damp, both at the root and on the leaves : the latter 

 should not be wetted, nor exposed to currents of air, nor the 

 desiccation caused by excessively dry air. The scaly fronds 

 suffer most from damp. N. distans, N. Eckloniana, N. lanu- 

 ginosa, N. Marantce, N. nivea, N. tenera, are the chief. 



NUPHAPt. [Nymphajaceae.] Hardy water plants, with 

 large floating leaves like those of Nymphaea, but having 

 yellow flowers. The exotic species are worth cultivating. 

 The culture of them is in all respects the same as that of 

 Kymphasa. 



NUTTALLIA. [Ptosacege.] Hardy shrub. Loam and peat. 

 Layers. The plants often called Nuttallia in gardening belong 

 to Sida. X. cerasifonnis, hardy deciduous shrub, flowers white, 

 in spring. 



NYCTERINIA. [Scrophulariacese.] Pretty greenhouse 

 plants, requiring to be grown in a sandy soil of peat and 

 loam. Increased by cuttings or seeds. The perennials re- 

 quire an airy greenhouse and care in watering. The annuals 

 to be treated as half-hardy annuals. 



NYMPHJ5A. Water Lily. [Nymphaeaceae.] A family 

 of beautiful water plants, including some of the most desirable 

 for cultivation in hardy aquariums. This genus includes 

 several stove species as well as the hardy ones, of which 

 latter nearly all have white flowers. The plants require to 

 be planted in a layer of rich mud at the bottom of the water ; 

 and so that there is room enough for their floating foliage 

 they need little other attention. One of the best ways of 



