H YG 



321 



ICE 



be lengthened in the stem, so as to 

 range to any degree required ; but I 

 do not anticipate that a greater range 

 would be required for the coldest pit 

 or green-house. As I have found it very 

 useful in my own stove, I hope it may 

 be of service to your readers; and as it 

 is self-acting, so I trust it will be found 

 on trial, ' simple, economical, and ef- 

 fectual.'" — Gard. Chron. 



HYGROPHILA ringens. Stove 

 evergreen trailer. Cuttings. Kich light 

 soil. 



HYLESINUS PINIPERDA. A spe- 

 cies of beetle which preys upon the pith 

 of young shoots of sickly or recently 

 felled Scotch and spruce firs. It is not 

 very injurious in this country. 



HYLOTONIA rosce. A saw-fly which 

 injures rose-trees seriously by punctur- 

 ing in rows their young shoots, and de- 

 positing in the holes its eggs. The 

 best remedy is spreading a cloth be- 

 neath the trees in the evening, and 

 killing the insects shaken down upon 

 it. — Gard. Chron. 



HYMEN^A. Locust-tree. Three 

 species. Stove evergreen trees. Cut- 

 tings. Loam and peat. 



HYMENANTHERA df-nJafa. Green- 

 house evergreen shrub. Cuttings. Peat 

 and loam. 



HYMENOPHYLLUM. Two spe- 

 cies. Hardy ferns. Seed and division. 

 Loam and peat. 



HYOSCYAMUS. Henbane. Four 

 species. Two half-hardy evergreen 

 shrubs ; one hardy annual ; and the 

 fourth biennial. Cuttings or seed. 

 Common soil. 



HYPECOUM. Three species. Har- 

 dy annuals. Seed. Common soil. 



HYPERICUM. Seventy-three spe- 

 cies. Hardy, half-hardy, and green- 

 house. Mr. Paxton says the two latter 

 thrive in loam and peat, propagated by 

 young cuttings ; the hardy shrubs and 

 herbaceous grow from seed or division 

 in any soil; and the annuals may be 

 sown in spring in the open ground. 



HYPHtENE coriacea. Stove-palm. 

 Seed. Sandy loam. 



HYPOCALYPTUS abcordatus. 

 Green-house evergreen shrub. Young 

 cuttings. Sandy loam and peat. 



HYPOESTES. Five species. Stove 

 plants of various character ; chiefly 

 evergreen shrubs. These, and the 

 herbaceous species, propagate by cut- 

 tings in a light soil. 

 21 



HYSSOP. Hyssopus officinalis. 



Varieties. — There are three varieties, 

 the white, red, and blue; the lust of 

 which is most commonly cultivated. 



Soil and Situation. — A dry soil is the 

 one most appropriate for it. If on a 

 rich or wet one, it is generally destroy- 

 ed by the frost, as well as rendered less 

 aromatic. 



Time and Mode of Propagation. — It 

 is propagated by seed, and slips of the 

 branches, and young shoots, as well as 

 by offsets. The seed may be sown 

 from the close of February until the 

 end of May. Rooted offsets may be 

 planted in March, April, August and 

 September; cuttings of the branches in 

 April and May; and slips of young 

 shoots in June or July. The seed may 

 be inserted in drills, six inches apart, 

 not deeper than half an inch. It is the 

 usual practice, when the seedlings have 

 attained the growth of six weeks, to 

 prick them out twelve inches apart ; 

 but it is by much the best practice to 

 raise them where they are to remain. 



The slips and off'sets are best planted 

 at first in a shady or north border: 

 they are generally firmly rooted in two 

 months. In September or October they 

 are all fit for removal to their final sta- 

 tions. After every removal they must 

 be watered plentifully and regularly 

 until established. The only subsequent 

 cultivation requisite is the keeping them 

 free of weeds by frequent hoeings. 



In spring and autumn likewise all 

 decayed branches and flower-stalks 

 must be removed ; those used as 

 edgings trimmed close, and the earth 

 gently stirred around them. 



I B E R I S . Candy-Tuft. Twenty- 

 three species. A few hardy evergreen 

 shrubs ; but chiefly hardy annuals, bien- 

 nials, and perennials. Seed. Common 

 light loam. 



ICE-HOUSE. Any vacant out-house 

 which can be thoroughly drained will 

 be an efficient ice-house. Moisture is 

 a much more rapid solvent of ice than 

 mere heat. If in an out-house, with 

 drains leading from its floor, a layer of 

 faggots three feet deep be placed, and 

 round the sides of the house a lining of 

 stubble or straw nearly as thick, and 

 then the ice be rammed in hard, and 

 covered over with a similar coat of 

 stubble, the ice may be preserved there 

 for twelve months. 



•' The accompanying drawing and de- 



