INO 



325 



IRR 



INOCULATION. See Budding. [flower well the following season, and 



INOCULATING GRASS. See Turf. \ therefore should not be replanted more 



I P O M ^ A . Sixty-four species. : than once in five or six years. When 



Chiefly green-house and stove twiners. ' the bulbs are taken up they should be 



1. caudicans ; I. lacunosa ; I. pandu-\ placed in dry sand for about a month, 



rata; I. sagittifolia ; I. sibrica ; I. sin- \ and afterwards planted in the manner 



uata ; and /. trichocarpa, are hardy. 

 Cuttings. Rich loam and peat. An- 

 nuals and biennials bv seed in a gentle 

 hotbed, as directed for the following : — 

 " The best time for sowing Ipomaa 

 quamoclit, and rubra carulea for plant- 

 ing in the open air, is the end of Feb- 

 ruary. They will both succeed under 



before mentioned. Seeds of Irises 

 should be sown in drills in Scptomlier, 

 in light sandy soil ; they will come up 

 the following spring, but the young 

 bulbs should remain for two or three 

 years before they are removed. 



" The best way to treat the Persian 

 Iris, is to place the roots, in October, 



similar treatment, viz., to sow them in in pots filled with a mixture of either 

 a gentle hot-bed, to pot them oft" sepa- 1 sandy loam well drained and leaf mould, 

 rately, and encourage their growth i or sandy peat and well rotted dung, and 

 until the end of May, when they may ' set them in some dry pit for the winter, 

 be planted out in light rich soil in a and give but little water until the spring, 

 sheltered situation." — Gard. Chron. Or | and when they begin to show their 

 sow the seed in May or June in a warm ; blooms, plant them in the open bed. If 

 situation, having previously soaked it i this is carefully done they will he gay 



for forty-eight hours in soft water. 



during April and the beginning of May, 



IPOMOPSIS elegans. " Hardy bien- but they must be protected from the 

 nial. Seed. Peat and loam, in a cold ' spring frost when in bloom, or they 

 frame during July ; leave three in a pot, I will not last long in flower. Persian 

 and place in green-house for winter ; i Irises are tender, and will not survive 

 water moderately; shift in spring into i the winter in the open border, unless 

 forty-eights well drained; leave only ! the situation is dry, for they sutler more 

 two plants in a pot; water very mode- ' from the effects of damp than cold 



rately." — Paxlon's Bot. Diet 



IRKSINE. Four species. Half-hardy 

 herbaceous. Seeds, in a gentle hotbed. 

 Rich loam and peat. 



IRIS. Eighty-nine species. Chiefly 

 hardy bulbs. /. clandestina ; I. crassi- 

 folia ; and /. deflexa, require the shelter 

 of a greenhouse. The soil cannot well 

 be too sandy for them. Seed or divi- 

 sion of the roots. 



Dr. Lindley gives the following di- 

 rections for cultivating the English and 

 Spanish species: — 



They may also be grown like hyacinths 

 in glasses filled with water, in the 

 windows of silting rooms, and are de- 

 sirable for such a situation, as two or 

 three plants will scent a room. They 

 also succeed in pure sand if the roots 

 are strong. 



" The roots must be taken up in the 

 open beds every season, and either pot- 

 ted or preserved in sand during the 

 winter, but if not potted before the 

 spring they become exhausted, and do 

 not flower well, whereas if planted in 



"About August prepare a bed two ' the open bed in autumn, they are almost 



feet deep, the soil of which must be 

 composed of eciual parts of rich loam, 

 sandy peat, and either well rotted dung 

 or leaf mould, all well incorporated to- 

 gether. The beginning of September, 

 plant the bulbs about three inches deep, 

 placing a little fine sand around each, 

 and afterwards cover and level the sur- 

 ace; nothing else will be required ex- 

 cept stirring the surface of the soil in 

 the spring. The Irises will bloom about 

 the middle of June, and the seeds will 



sure to perish." — Gard. Chron. 



IRISH HEATH. MemiesiapolifoUa. 



IRON-WORT. Sideritis. 



IRRIGATION, as employed by the 

 farmer, is chiefly beneficial in proportion 

 to the amount of saline and decompos- 

 ing matter contained in solution by the 

 water employed. But this is not the 

 exclusive cause of benefit, for much of 

 this arises from the increased and per- 

 manent supply of moisture to the roots 

 of the plants. These can only derive 



ripen in the beginning of August; when, j food from the soil in a gaseous or liquid 

 if it is required, the bulbs should be form; and the decomposing matters in 

 taken up; but it must be observed that | a soil decompose, and constantly are 

 when they are removed they seldom i converted into gaseous and soluble mat- 



