I El 



{ 515 ] 



ISM 



/. Ruthe'nica (Russian). 1, Blue. May. Si- 

 beria. 1804. 



sambuci'na (Elder-scented). 3. Light blue. 



June. South Europe. 1658. 



scario'sa. (membraneous). 1. Blue. May. 



Russia. 1826. 



setn'sa (bristle-pointed). !. Blue, purple. 



May. Siberia. 1844. 



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



Siberia. 1596. 



fto're a'lbo (white-flowering). 2. 



White. May. Siberia. 1596. 



flo're ple'no (double-flowered). 3. 



Purple. May. Gardens. 



so'rdida (dirty). 1*. White. May. 1819. 



spathul'ata (spa.thul&te-flowered). 1. Pale 



blue. June. Germany. 1759. 



spu'ria (spurious), 1-J. Pale blue. May. 



Siberia. 1759. 



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



South Europe. 1768. 



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



June. 1819. 



sty losa (large-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). !. White. May. 1819. 



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



giers. 1820. 



Tau'nca (Taurian). Yellow. June. Tau- 



ria. 1827. 



te>nnx (tough). Purple. July. California. 



1826. 



tridenta'ta (three-toothed). l. Blue. May. 



North America. 1820. 



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



Italy. 1821. 



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



Hungary. 1597. 



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



Dauria. 1800. 



ve'rna (spring). 1. Purple. April. Vir- 



ginia. 1748. 



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



gated. May. North America. 1732. 



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



South Europe. 1800. 



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



Virgi'nicu (Virginian). 1. Blue. June. 



North America. 1758. 



IRISH HEATH. Menzle'sia polifo'lia. 

 IRON- TREE. Siderode'ndrum. 

 IRONWOKT. Sideri'tis. 



IRON WOOD. Sidero'xylon and Me- 

 troside'ros. 



IRRIGATION. Experience shews 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 testimony to the correctness of 

 Mr. Knight's conclusion, not limit- 

 ing, however, our approval of such 

 abundant watering to late crops of 



peas, but to all, as well as beans, 

 spinach, and the entire cabbage tribe. 

 Kidney beans and potatoes are not be- 

 nefited 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 gardener who has not seen the 

 result will be inclined to suppose pos- 

 sible ; and it is greater than I myself 

 could have believed 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 circumstance af- 

 forded me the means of making a small 

 pond, from which I can cause the water 

 to flow out over every part of every 

 other kind through every part of the 

 summer ; and I cause a 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 exten- 

 sive and beneficial use which I make 

 of the power to irrigate my garden by 

 the means above-mentioned, is in sup- 

 plying 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 sup- 

 plied with very excellent peas through 

 the month of October." 



ISA'NTHUS. (From isos, equal, and 

 antkos, a flower ; referring to the regu- 

 larity of the flowers. Nat. ord., Llp- 

 ivorts [Lamiaceee]. Linn., I-Didyna- 

 mia l-Gymnospei-mia. Allied to Mint.) 



Hardy annual. Seeds in April, in a peaty 

 border, or in a little heat, in March, and trans- 

 planted. 



I. ceeru'leus (blue). 1. Blue. July. North 

 America. 1818. 



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

 a German surgeon. Nat ord., Cin- 

 chonads [Cinchonaceee]. Linn., b-Hex- 

 andrla \-Moiioyynia. ) 



Stove evergreen shrub. Cuttings, in sandy 

 soil, in a hotbed, in spring or summer; peat 

 and loam, with a little charcoal and silver sand. 

 Summer temp., 60 to 85 ; winter, 55. 

 I. cocci'nea (scarlet). 10. Scarlet. ; July. 

 Guinea. 1820. 



ISME'IJA. (Probably a commemo- 



