832 IRIS 



98 Palaeatina, B01-.S Li ^ o-b lu long stem very 

 short Hs pale jellow, tinged with lilac, outer seg 

 ments oblong, upper "4 leflexed, claw auriculate , inner 

 segments minute, narrowlj lanceolate Pis in winter 

 Mts of Palestine \ ery near / Vuncasicii, but dis 

 tinguished bj its longer acuminate spathes and the color 

 of the (!•, 



09 alita, Poir (/ sco>;)io)des, Desf ) Lvs about 6, 

 plane b 9 in long stem very short outer segments 

 i-i in long, obovate cuneate, biight lilac, variegated 

 with white and having a yellow keel down the clan , in 

 ner segments obovate unguiculate, spreading from the 

 base of the outer style ciest large, lacmiatelj toothed 

 Winter flowering Plants very dwaif Spain to Sicily 

 and Algeria B R 22 187G Gn 10, p 579 and 54, p 102 

 G M 35 614 



100 Caucisica, Iloffni Lvs about G stem short 

 fls pile or blight \ellow, outer segment-, with an ovate 

 I lide ind i very broad rhomboidil cliw with small au 



ment^ mo 

 lilac, with 

 ments ^ 

 RH 1880, p ii'i 

 Of thp fnllowin 



IRRIGATION 



spotttd \ ar caerulea, Hort Fls bright 

 yellow blotch on the bl ule of the outer seg 

 , lurke^tan B M 7111 Gn oi, p 482 



ricles and a toothed or ciliated crest, inner segments 

 oblauceolate D«arfer habit than / ojc/siojdfs Cauca 

 sus to Asia Minor, etc 



101. fumdsa, Boiss. & Haussk. Lvs. about 10: stem 

 6 In. long: outer segments spatulate-oblanceolate, re- 

 curved above the middle, claw with a yellow crest; in- 

 ner segments minute, spatulate, toothed. The fls. are 

 greenish yellow, shaded with smoky gray. Dry fields, 

 Syria. 



102. orohioidea, (';irr. Fi^'. 1181. Lvs. about G: stem 

 12-15 in. long, wiilidisl in. 't int. Tnodes: spathes l-fld.,2in. 

 long: fls. yellDw; .mt.r s. i-'ni.-nts with an obovate blade, 

 and a purple lili.i.-h ..n .n.li si.leof the crest of the claw; 



inner segments ..i.Imi I:iti'. l.'ss than an inch long, and 



generally slmrplv .I.H.x.-.l, with a long filiform claw. 

 Spring. Var. oculata, Jltixim. Blade of the outer seg- 



- jij - ; 



flowering 1 1 

 with violet loot 

 flowering 



The toUowing 1 

 Ameriein deilei s i 

 ers and are aUverti 1 m In t 1 

 8 29 34 38 39 40 4. jl j- jJ 

 83 84 80 8() 88 89 90 91 92 93 



IRIS HOOT, or OBRIS-EOOT 

 IRONBAEK hur I y plus 

 IRON WEED ^^tcd 



5 97 98 99 100 101 102 

 H HAS«ELBRI^& 



Ins Flmtntina 



IRONWOOD, in America, Oshija ^uglnlca 



IRRIGATION. Irrigation in its broadest sense in 

 eludes all problems of collecting, storing, delnering, 

 and applying water to the land through the construe 

 tion of dams, reservoirs canals and laterals ind the 

 application of power when necessary to delnei the 

 water while in a restricted horticultural sense it is a 

 method of cultivation, having for its obiect to increase 

 and regulate the water supply in the soil 



In this latter sense Irrigation is a necessary practice 

 in the and legions, and is advisable in the humid re 

 gions in proportion to the intensity of the cultivation 

 md the value of the crop grown Thus in Florida with 

 vn average of GO to 70 inches of annual rainfall — usually 

 well distributed — Irrigation has been largely introduced 

 in the past few years for hoiticultural crops and even 

 for tobacco, as an insuiance against loss or damage by 

 the occasional droughts The farst cost of a small Iru 

 gallon plant in Florida, for 20 acres or over, is said to 

 be approximately $100 to $150 per acre; the interest on 

 which, and the necessary repairs, would amount to from 

 $5 to $10 per acre per annum. This is a small expendi- 

 ture to insure a crop against loss or injury where the 

 value per acre is so great as in many horticultural lines. 

 Irrigation is needed not only to prevent the actual death 

 of the plants, but to promote a uniform, rapid, and con- 

 tinuous growth, which is necessary for the development 

 of the finest texture or flavor of the commercial crop. 



King has shown that the value of a crop saved in Wis- 

 consin, such as the strawberry, in a season when the 

 crops generally are injured by drought, may pay all the 

 expenses of the original cost of the Irrigation plant. 



