832 IRIS 



98. Palsestina, Boiss. Lvs. 3-G in. long: stem very 

 short: fls. pale yellow, tinged with lilac; outer seg- 

 ments oblong, upper K reflexed; claw auriculate ; inner 

 segments minute, narrowly lanceolate. Fls. in winter. 

 Mts. of Palestine. Very near /. Vancasica, but dis- 

 tinguished by its longer acuminate spathes and the color 

 of the Hs. 



99. aUta, Poir. {I. scorpioldes.Best.]. Lvs. about 6, 

 plane, 6-9 in. long: stem very short: outer segments 

 3-4 in. long, obovate-cuneate, bright lilac, variegated 

 with white, and having a yellow keel down the claw ; in- 

 ner segments obovate-unguiculate, spreading from the 

 base of the outer: style crest large, laciniately toothed. 

 Winter-flowering. Plants very dwarf. Spain to Sicily 

 and Algeria. B.R.22:1876. Gn. 10, p. 579 and 54, p. 102. 

 G.M. 35:614. 



100. Catic&sica, Hoffm. Lvs. about 6 : stem short: 



IRRIGATION 



ments more spotted. Var. cserulea, Hort. Pis. br 

 lilac, with a yellow blotch on the blade of the outer 

 ments. Mts., Turkestan. B.M. 7111. Gn. 53, p. 

 R.H. 1880, p. 337. 



Of the following names wh h are f o n 1 n cat logi c 

 complete d r pt on s available / it,su \a a Blu si w 

 — / a g St a Deep yeUow marked thma oon Or r 1 1 

 ot I ar eg-iti -/ Batta di^n Wh te A^lgena Bull 

 Bos a a \ ellow Rhizomatous — 1 brachys\pho P 1 I 

 Rh zomitous -I Bnttan c is FdXe p k w th the o 

 net 1 tl purple Carl to u t I 1 



( 1 ents redd sh purpi 



J etlow C erma — / 



Pale black witl j Ui 



te a form of I neglecta Ldac 

 d purple — / ; gulans Purple 



-I M 



"=^^ 



: flBj erect at 1 



A good species for pots. 



ricles and a toothed or ciliated crest; inner segments 

 oblanceolate. Dwarfer habit than /. orcAj'oi'dcs. 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. orohioldeg, Carr. Pig. 1181. Lvs. about 6: stem 

 12-15 in. long,with distinct intemodes : spathes 1-fld. ,2in. 

 long: fls. yellow; outer segments with an obovate blade, 

 and a purple blotch on each side of the crest of the claw; 

 inner segments oblanceolate, less than an inch long, and 

 generally sharply deflexed, with a long filiform claw. 

 Spring. Var. oculita, Maxim. Blade of the outer seg- 



111 1 N I Per 



1 nell i 1 tl t e hort 



the flowe g time fl spr ng ng iron th& 



gro d the long t be 1 ghtl mpped ro nd 1 y the Hnceolate 



SI- tl il n t r t. e t '>m long blide refle ed bla k 



111 1 1 t p w th n in 1 1 ck spots on a pale 



1 r e^n ents smill 1 or zontil stjle 



I A_mer intnl t t III " 1 1 Gn 

 / I =Hermo H t 1 t ero s -/ Tog 



I 1 I ca ind I Ro enb 1 na but earher 



II 1 M n color s Iver gr j predom nat ng 

 V, \ It lie mark ngs \ ar grand flora Large 

 flowering 



The following numbers are not mentioned n eitalogues of 

 \n er in dealers They ire procurable thro gh f r grow 



1 re A Ivert ed n D tch Amen a I I 4 >; 



40 4 51 5 53 W 58 5 

 b h9 aO 91 9 J3 95 96 J 



IRIS ROOT, or OBBIS BOOT. I J 



IRONBABK. Eucalyptus. 



IRONWEED. Weed. 



IRONWOOD, in America, Ostrya Virginica. 



IRRIGATION. Irrigation in its broadest sense In- 

 chuies all problems of collecting, storing, delivering, 

 and applying water to the land through the construc- 

 tion ot dams, reservoirs, canals and laterals, and the 

 application of power when necessary to deliver the 

 water; while in a restricted horticultural sense it is a 

 method of cultivation, having for its object to increase 

 and regulate the water supply in the soil. 



In this latter sense Irrigation is a necessary practice 

 in the arid regions, and is advisable in the humid re- 

 gions in proportion to the intensity of the cultivation 

 and the value of the crop grown. Thus in Florida, with 

 an average of 60 to 70 inches of annual rainfall — usually 

 well distributed — Irrigation has been largely introduced 

 in the past few years for horticultural crops and even 

 for tobacco, as an insurance against loss or damage by 

 the occasional droughts. The first cost of a small Irri- 

 gation plant in Florida, for 20 acres or over, is said tc 

 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 i\:hen the 

 crops generally are injured by drought, may pay all th© 

 expenses of the original cost of the Irrigation plant. 



