[ 509 ] 



IMP 



I. cocci'nea (scarlet). 2. Scarlet. August. I 

 East Indies. 1803. 



cornu'ta (horned). 2. Red. August. I 



Ceylon. 1826. 



horte'nsis (common. Garden). 3. Bed. Sep- 



tember. East Indies. 1596. 



latifo'lia (broad -leaved). 1. Pale red. 



August. East Indies. 1818. 



longico'rnu (long - horned). May. East 



Indies. 



na'tans (floating). 2. Red. July. 



East Indies. 1810. 



Mastersia'na (Mr. Masters's). 1. Purple. 



July. Khoscea Hills. 1837. 



pi'cta (painted). 2. Pink. June. East 



Indies. 1837. Biennial. 



platype'talu (broad-petaled) . l. Rose. 



June. India. 1844. 



re'pens (creeping). l. Yellow. June. 



Ceylon. 1848. 



scapiflo'ra (scape-flowered). $. Lilac. Au- 



gust. East Indies. 1835. Bulb. 



trico'rnis (three -horned). 6. Yellow spotted. 



June. India. 1839. 

 GEEENHOUSE ANNUALS. 



/. bi'fidu (two-cleft). . Red. August. Japan. 

 1820. 



Capt'mis(Cx^G). . Red. August. Cape 



of Good Hope. 1818. 



Chine'iisis (China). 1. Purple. August. 



China. 1824. 



glanduli'gera (gland-bearing). 12. Purple. 



August. India. 1839. 



Madagascarie'nsi s (Madagascar). . Red. 



August. Madagascar. 1820. 



mi'nor (smaller). . Red. August. East 



Indies. 1817. 



Mysore'nsis (Mysore). . Red. August. 



Mysore. 1820. 



ro'sea (rose-coloured). 6. Rose. July. 



Himalayas. 1839. 



triflo'ra (three-flowered). 1. Pale red. 



August. Ceylon. 1818. 



tripe'tala (three-petaled). 1. Red. August. 



Nepaul. 1825. 



IMPATIENT. A plant is said to be 

 impatient of heat or cold, when it is 

 speedily injured by a slight excess of 

 either one or the other. 



IMPREGNATION. No seed ever attains 

 the power of germinating, unless the 

 pollen from the stamens in the same, 

 or some nearly allied flower, has reached 

 and impregnated its pistils. In fa- 

 vourable seasons, when genial warmth 

 and gentle winds prevail, impregnation 

 is readily effected by the plant's own 

 provision. The pollen is never shed 

 from the anther of the stamen, until 

 the stigma of the pistil is fully deve- 

 loped, and this soon withers after the 

 contact. 



Insects aid in effecting this impreg- 

 nation, and in frames, hothouses, &c., 

 from whence they are almost totally 



excluded, other artificial means might 

 be adopted with success to render 

 tiowers fertile that had hitherto failed 

 in producing seed. Thus the gardener 

 always finds the advantage of using the 

 camel hair pencil to apply pollen to the 

 stigmas of his forced melons, cherries, 

 and peaches. See Hybridizing. 



INARCHING or Grafting by approach 

 differs from grafting only in having the 

 scion still attached to its parent stem 

 whilst the process of union with the 

 stock is proceeding. It is the most 

 certain mode of multiplying an indi- 

 vidual that roots or grafts with diffi- 

 culty, but is attended with the incon- 

 venience that both the stock and the 

 parent of the scion must be neighbours. 



Having the stocks properly placed, 

 make the most convenient branches 

 approach the stock, and mark in the 

 body of the branches the parts where 

 they will most easily join to the stock, 

 and hi those parts of each branch, pare 

 away the bark and part of the wood 

 two or three inches in length, and in 

 the same manner pare the stock in the 

 proper place for the junction of the 

 graft, then make a slit upward in the 

 branch so as to form a sort of tongue, 

 and make a slit downward in the stock 

 to admit it ; let the parts be then joined, 

 slipping the tongue of the graft into 

 the slit of the stock, making the whole 

 join in. an exact manner, and tie them 

 closely together with bass, and after- 

 wards cover the whole with a due quan- 

 tity of clay, or wax. After this let a 

 stout stake be fixed for the support of 

 each graft, and so fastened as to pre- 

 vent its being disjoined from the stock 

 by the wind. 



The operation being performed in 

 spring, let the grafts remain in that 

 position about four months, when they 

 will be united, and they may then be 

 separated from the mother- tree ; in 

 doing this be careful to perform it with 

 a steady hand, so as not to loosen or 

 break out the graft, sloping it off down- 

 wards close to the stock ; and the head 

 of the stock cut down close to the 

 graft, and all the old clay and bandage 

 cleared away and replaced with new, 

 to remain a few weeks longer. Ob- 

 serve, however^ that if the grafts are 



