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I Tobacco. — All the different kinds of 

 j Tobacco have showy flowers ; but 

 I the handsomest species are N. Ta- 

 i hacum, the Virginian or common 

 j Tobacco, N. noctiflom, N. multi- 

 I Tcdvis, and N. longiflhra. All these 

 are annuals, and their seeds should 

 be raised on a slight hotbed or -warm 

 border ; and the plants, when in 

 their second pair of leaves, should 

 be transplanted to a bed of light 

 rich soil, where they should be 

 planted three feet apart every way. 

 While the plants are young, the 

 joints of the leaves should be fre- 

 quently examined, in search of a 

 caterpillar which is frequently found 

 there, and which, if not removed, 

 will eat off the points of the shoots, 

 I and consequently destroy the beauty 

 ! of the plant. iV. rustica, the com- 

 mon, or English Tobacco, the leaves 

 of which are generally used for 

 making tobacco-water, &c., should 

 never be grown in a garden, as the 

 flowers are of a dirty greenish-yellow, 

 and the whole plant is covered with 

 clammy hairs, extremely disagree- 

 able to the touch. 



Niebembe'rgia. — Solanacece. — 

 There are four species of Nierem- 

 bergia, all natives of South America; 

 viz. N. rjracilis, N. aristata, N. 

 flicaidis, and N. ccdycina, all of 

 which are pretty little greenhouse 

 plants, with whitish flowers, but 

 not at all showy. I have been thus 

 particular in enumerating the kinds, 

 because from professor Don and Dr. 

 Graham having at first supposed 

 that some of the kinds of Petunia 

 belonged to Nierembergia, great 

 confusion has arisen. The Nierem- 

 bergias should be gro'mi in jjeat and 

 sand, and kept regularly watered. 



Nige'lla. — Jianunculdcece. — 

 The Fennel-flower, or Devil in a 

 Bush. — Annual plants, with showy 

 flowers, which are, however, almost 

 hidden by their leafy involucres. ! 



A". Jdspdnica is the handsomest 

 species. They only require sowing 

 in March or April in the open 

 border : or they may ba so^ti in 

 autumn, as they will stand the 

 winter without protection, and will 

 thus be ready to flower early in 

 summer. 



Nightshade. — See Sola^num. 



Nisso'lia. — Leguminosce. — The 

 Grass Vetch. — A rare British plant, 

 with grass-like leaves and bright 

 crimson single flowers, which looks 

 very well on rock-work, where it can 

 be kept moist. 



Nitra'ria. — Ficoidece. — Low 

 shrubs with white flowers, which are 

 very hardy, and will grow well in 

 situations exposed to the sea. In 

 gardens, the ground in which they 

 grow should be occasionally watered 

 with water in which saltpetre has 

 been dissolved. 



Nitrate of Soda. — This sub- 

 stance, which is found in great abun- 

 dance as a natural production of the 

 earth in South America, is a very 

 powerful manure ; but it must be 

 applied carefully, or it will make the 

 leaves look brown and shrivelled. It 

 should always be mixed well with the 

 soil in which plants are to be placed, 

 and not laid on the surface of soil in 

 which plants are already growing. 

 When it produces its proper effect, 

 it gives great vigour to the plants, 

 and renders the leaves of an intensely 

 deep green. 



Noisette Rose. — Roses which 

 bear their flowers in bunches, and 

 which were named from a nursery- 

 man of the name of Noisette, in 

 Paris, who raised the first from seed 

 of the common China. — For the 

 culture, see Ro'sA. 



Nola'ka. — Nolanhcece. -•Tra.iVmg 

 annual plants, with pretty blue 

 flowers, that only require sowing in 

 IMarch in the op-^ n border. N. atri- 

 plicifblia, the handsomest species, 



