IRE 



L 461 ] 



ISM 



I.Sibi'rica (Siberian). 3. Light blue. May. 



Siberia. 1596. 

 flo're-u'lbo (white-flowering). 2$. White. 



May. Siberia. 1596. 

 flo'rc-ple'no (double-flowered). 3. Purple. 



May. Gardens. 



so'rdida (dirty). l. White. May. 181Q. 



spatliula'tu (spathulate-yZoM>em?). ! Pale 



blue. June. Germany. 1759. 



spu'ria (spurious). If. Pale blue. May. 



Siberia. 175Q. 



squa'lens (daubed). 2. Striped. May. South 



Europe. 1/68. 



steno'gyne (narrow-stigmaed). lj. Yellow. 



June. 18J9. 



stylo'sa (Jre-styled).Blue. May. Corfu. 1844. 



sub-biflo'ra (sub-two-flowered). l. Violet. 



July. Portugal. 1596. 



Susia'na (Susian). 2. Striped. April. Le- 



vant. 1596. 



Swe'rtii (Swert's). l. White. May. 181Q. 



Tange'rica (Tangier). Yellow. June. Tan- 



giers. 1820. 



Tuu'rica (Taurian). Yellow. June. Tauria. 



1827. 



te'nnx (tough). Purple. July. California. 1826. 



ti-identa'ta (three-toothed), ij. Blue. May. 



N. Amer. 1820. 



triflo'ra (three-flowered). 1. Blue. June. 



Italy. 1821. 



variega'ta (variegated). 2. Striped. May. 



Hungary. i597. 



ventrico'su (swollen). 1. Pale blue. June. 



Dauriu. 1800. 



ne'rna (spring) . l. Purple. April. Virginia. 



1748. 



versi'color (various-coloured). 1. Variegated. 



May. N. Amer. 1732. 



viola' cea (violet-coloured). . Violet. May. 



South Europe. 1800. 



- vire'scens (greenish). 1. Yellow. May. 1820. 

 -- Virgi'nica( Virginian). 1. Blue. June. JN. 

 Amer. 1758. 



IRISH HEATH. Memie'sia polifo'lia. 



IKON-TREE. Sidvrode'ndrtm* 



IKONWORT. Sideri'tis. 



IRON WOOD. Sidero'xylon and Metro - 

 side'ros. 



IRRIGATION. Experience shows that 

 there is in the kitchen-garden scarcely a 

 crop that is not benefited by a much more 

 abundant supply of water than can be 

 obtained usually ; and we can bear testi- 

 mony to the correctness of Mr. Knight's 

 conclusion, not limiting, however, our 

 approval of such abundant watering to 

 late crops of peas, bat to all, as well as 

 beans, spinach, and the entire eabbrfge 

 tribe. Kidney beans and potatoes are 

 not benefited by such an abundance of 

 water. " The quantity of water," says 

 Mr. Knight, " which may be given with 

 advantage to plants of almost every kind, 

 during warm and bright weather, is, I 

 believe, very much greater than any gar- 

 dener who lias not seen the result will 

 be inclined to suppose possible ; and it 

 is greater than I myself could have be- 



lieved upon any other evidence than that 

 of actual experience. My garden, in 

 common with many others, is supplied 

 with water by springs, which rise in a 

 more elevated situation ; and this cir- 

 i cumstance afforded me the means of 

 j making a small pond, from which I can 

 j cause the water to flow out over every part 

 j throughout the summer ; and I cause a 

 I stream to flow down the rows of celery, 

 ! and along the rows of brocoli and other 

 plants, which are planted out in summer, 

 with very great advantage. But the most 

 extensive and beneficial use which I make 

 of the power to irrigate my garden by 

 the means above-mentioned, is in supply- 

 ing my late crops of peas abundantly 

 with water, by which the ill effects of 

 mildew are almost wholly prevented, and 

 my table is most abundantly supplied 

 with very excellent peas through the 

 month of October." 



ISA'NTHUS. (From isos, equal, and 

 anthos, a flower; referring to the regula- 

 rity of the flowers. Nat. ord., Lipworls 

 [Lamiacese]. Linn., l^-Dldynamia 1- 

 Gymnospermia. Allied to Mint.) 



Hardy annual. Seeds in April, in a peaty 

 j linrder, or in a, little heat, in March, and trans- 

 I planted. 



j 1. ctKru'lws (blue). 1. Blue. July. N. Amer. 

 1818. 



ISE'RTIA. (Named after P. E. Isert, 

 1 a German surgeon. Nat. ord., Cinchonads 

 j [Cinchonacese]. Linn., 6-Hexaudria 1- 

 i Monogynia.} 



Stove evergreen shrub. Cuttings in ?andy soil, 

 in a hotbed, in spring or summer ; peat and loam, 

 | \vith a little charcoal and silver sand. Summer 

 temp., 60 to 85; winter, 55. 

 /. cocci'neu (scarlet). 10. Scarlet. July. Guinea. 

 1820. 



ISME'LIA. (Probably a commemora- 

 tive name. Nat. ord., Composites [Aster- 

 acese] . Linn., 19-Syngenesia 2- Superflua. ) 



This should be united to Chrysanthemum. 

 Half-hardy evergreeen shrub. Seeds in spring, 

 in a gentle hotbed; cuttings of firm young side- 

 shoots in summer ; sandy loam. Winter temp., 

 35 to 40. 



/. Madere'nsis (Madeira). 2. Straw. May. 

 Madeira. 1834. 



ISME'NE. Peruvian Daffodil. (After 

 Ismene, the daughter of CEdipus and 

 Jocasta. Nat. ord., Amaryllids [Amaryl- 

 lidaceae]. Linn., G-Hexandria 1-Mono- 

 gynia. Allied to Choretis.) 



"Absolute rest in winter is essential to this 



genus." They should be planted out in a border 



in April, and taken up when the frost cuts the 



I leaves; deep, sandy soil suits them best. Offsets. 



