NIG 



[ 569 ] 



NIS 



N. damasce'na (damask). l. Lilac, blue. July. 



South Europe. 1570. 

 flu're-ple'no (double-flowered). l. Lilac, 



blue. July. South Europe. 15/0. 



Hispu'nica (Spanish). l. Brown, white. July. 



Spain. 1629. 



orienta'lis (eastern). l. Yellow. July.Syria.l699. 



satl'va (cultivated). l- Yellow. July. 



Egypt. 1548. 



citri'nu (citron-coloured-seerferf). 1^. Pale 



blue. July. South Europe. 



Cre'tica (Cretan). l^.Pale blue. July. Crete. 



1'ndica (Indian). 1. Pale blue. July. 



E. Ind. 



NIGHTSHADE. Sola'num. 



NIGHT-SOIL. See DUNG. 



NIGHT TEMPERATURE in hothouses, 

 greenhouses, and frames should always 

 average from 10 to 20 lower than the 

 temperature in which the plants are 

 grown during the day. It is in the night 

 that the individual functions are reno- 

 vated by a temporary repose, and if left to 

 the dictates of healthy nature, the sap, 

 like the blood, rises at night with a much 

 diminished velocity. That plants do 

 become exhausted by too unremitting 

 excitement, is proved to every gardener 

 who has peach-houses under his rule; for 

 if the greatest care be not taken to ripen 

 the wood by exposure to the air and light 

 during the summer, no peach-tree will 

 be fruitful if forced during a second suc- 

 cessive winter, but will require a much 

 more increased temperature than at first 

 to excite it even to any advance in vege- 

 tation. 



The experiments of Harting and Mun- 

 ter upon vines growing in the open air, 

 and those of Dr. Lindley upon vines in 

 a hothouse, coincide in testifying that 

 this tree grows most during the less light 

 and cooler hours of the twenty-four; 

 but the hours of total darkness were the 

 period when the vine grew slowest. This, 

 observes Dr. Lindley, seems to show 

 the danger of employing a high night 

 temperature, which forces such plants 

 into growing fast at a time when nature 

 bids them repose. 



That the elevation of temperature at 

 night does hurtfully excite plants is 

 proved by the fact, that the branch of a 

 vine, kept at that period of the day in 

 temperature not higher than 50, inhales 

 from one-sixteenth to one-tenth less 

 oxygen than a similar branch of the 

 same vein, during the same night, in a 

 temperature of 75=. The exhalation of 

 moisture and carbonic acid is also pro 

 portionably increased by the higher tem- 

 perature. 



NI'PA. (The Moluccan name. Nat. 

 ord., Palms [Palmaceae]. Linn., 21-Mo- 

 ncecia 10-Monadclpliia. ) 



Stove Palm. Seeds in :i strong, moist heat, not 

 giving too much moisture to the seed at first ; 

 rich loam. Winter temp., 60 to 65; summer, 

 60 to 90, and moist atmosphere. 

 N.fru'ticans (shrubby). 10. White. E.Ind. 1822. 



NIPELE'A. (From niphos, snow ; snow- 

 white flowers. Nat. ord., Gesnerworts 

 [Gesneracere]. Linn., l-Didynamia 2- 

 Angiospermia. Allied to Achimenes.) 



Stove herbaceous, white-flowered perennials. 

 Divisions of tiie roots, as growth commences, in 

 the sprint; sandy loam and peat, enriched with 

 leaf-mould or rotten cow-dung. Temp, when at 

 rest, 40 to 45 ; when starting and potted, 55 to 

 70; when growing. 60 to 75; when flowering, 

 rather less; until after flowering they are allowed 

 to become nearly dry, when a low temperature 

 suits them. 



N. a'lbo-linea'ta (white-lined-teaf). |. Sep- 

 tember. New Grenada. 1844. 



oblo'nga (oblong). . September. Guatimala. 



1841. 



ru'bra (red-hatred). . November. 1846. 

 NIPHO'BOLUS. (From niphobohis, 



covered with snow ; referring to the white 

 covering of the spore^cases. Nat. ord., 

 Ferns [Polypodiacese]. Linn., 2-Cryp- 

 toyamia l-Filices.) 



Stove Ferns, with brown spores. See FERNS. 

 N. acrostichoi'des (acrostichum-like). September. 

 Isle of Luzon. 



adna'scens (stem-leaf-pressed). . May. E. 



Ind. 1894- 



a'lhicuns (whitish). 1. July. Ceylon. 



bi'color (two-coloured). August. Malacca. 



co'nfluens (running-together). . May. N. 



Holland. 18-20. 



costa'tus (ribbed-teaced). July. Ceylon. 1824. 



flocculo'sus (woolly-tufted). August. Manilla. 



1841. 



gla'ber (smooth). July. Malacca. 



linen' re (narrow -leaved). . May. Japan. 1822. 



li'ngua (tongue-like). . May. Japan. 181/. 



nummularifo'lius (moon wort-leaved). May. 



Isle of Luzon. 



pertu'sus (bored). . May. China. 1821. 



rupe'stris (rock). . May. N. Holland. 1824. 



Sine'nsis (Chinese). . September. China. 



sple'ndens (shining). July. E.Ind. 



i>ph<Kr<ice'phulus (round-headed). July. Ma- 



lacca. 



va'rius (variable). July. Malacca. 1845. 



NISSO'LIA. (Named after W, Ni$sole t 

 a French botanist. Nat. ord., Legtimi* 

 nous Plaiils [Fabacese]. Linn., 17 Dia- 

 dclpliia 4:-Decandria. Allied to Amicia.) 



Cuttings of short, stubby, half-ripened shoots 

 in spring and summer, in sand, under a bell- 

 glass, in bottom-heat ; peat and loam. Winter 

 temp., 55 to 60 ; summer, 60 to 85. 



STOVE EVERGREEN SHRUBS. 

 N. glabru'ta (polished). 6. White. 1823. 



micro'ptera (small-winged). 10. White. July. 



Teneriffe. 1820. 



Robiniasfu'lm (Robiuia- leaved). 6. St. Vin- 



cent. 1824. 



