I'L.A 



EICHHORNIA 



or potassium sulphkle, ni;iy lio sprayeil about the roots 

 of the plants to good advantage. Practice rotation of 

 crops. 



A second form of blight is caused by Bacillus solana- 

 cearitm, Smith. This disease has its uri^'iii i)f iiift-ction 

 in the leaves, and is intro.liir,.! l,y iii.,iii- .f m .-.•ts 

 which have fed upon disc-;i~i M |.l m' i ! i tin- 

 infection to the well ones. 'I'L.- li < ' .I'lly 



down the tissues, and causes ili,,i,;iiii d i-,, l- :ii and 

 finally of the whole plant. Thi- only n-inc.ly tor ihis is 

 to destroy all plants that are affected with the disease 

 as soon as detected, and kill olT all insects. When this dis- 

 ease is known to be present in a section, it is best to 

 set the plants as far apart as practicable. In this way 

 the danger of infection from insects is somewhat re- 

 duced. When the disease is known to be present in a 

 field it should not be planted to this crop. 



Insect Enemies.— Among the most annoying of the 

 insect enemies we must place the cut-worm (larvag of 



754 Sprays of Early Dwarf Purple Eecplant 



cd in the course of « 



s the lower surface of the leav 



■ticli the pest with insecticides, 



The 



at- 



for prev 



Phnm. 



hotbed. 



es, making it difficult 

 but persistent efforts 

 (■(1 with a fine nozzle, 

 I. 1...-. .' t:hirisporium 

 1.1 this crop, 

 ' ,1 Ills. "It m.ay 

 . .1 i .; - in the fruit, 

 .i. la ., liurdered with 

 ud to good advantage 



affected wit 

 off by some- 

 miserable <■> 

 will reveal 

 level. The 

 and then avi 

 detected in 

 soil should 

 one applicat 



EGYPTIAN LOTUS. See Numplum Lotus; also ye 



EHRfillA (G. D. Ehret, botanical painter, born in 

 German\, 17(IH, died m LngHnd, 1770) BonagtnAcece. 

 \bout ill species of tender trees and shrubs, found in 

 the w-vimcr regions of the world Two species are cult, 

 outdoors in S Calif and 2 others in European green- 

 houses Plants w ith or without rough shoit hiirs Ivs. 

 alt( rn ite, saw toothed ornot fls small, often white in 

 cMnts curjmbs, terminal panicles or rarely all borne 

 m ill u| 1 I r axils The2speciis d(scrib(d below are 

 ^ 1.1 n t.(ts in S Cahf , attaining a height of 30 ft. 

 •-- I ni i\ be obtained through dealers in Japanese 



A Li t laii toothed 



B Foliage hairy 



macrophylla, \\ ill Lvs ovate, acute, sharply 



1 ihi_d with louf, harsh rigid hairs abo\e and soft 



I 111 I s( Clue beneath p micle terminal pubescent calyx 



1 iliatt fr globose, obscurely 4 groo^ ed Himalayas 



Trcip Asia and \ust —"Drupes red, the si/e of a pea; 

 said to be edible E Jf Eeasonei , Oneco, Fla 

 AA. Lth. tisually not toothed. 

 elliptica, no. Tree, 15-50 ft. high: lvs. oval or ob- 

 Icinu', si.iiii. limes saw-toothed, nearly hairless, or with 

 ininuii- hairs and very rough above: fr. a yelk>w glo- 

 bose drupe-, the size of a small pea, with edible thin 

 pulp. Tex., Mex. Yf_ ^i 



EICHH6RNIA (after J. A. F. Eichhom, a Prussian). 

 Ponlcderiilrea;. This genus includes the Water Hya- 

 cinth (see Pig. 755), the famous "million dollar weed" 

 that obstructs navigation in the St. John's river, 

 Florida, and is a source of wonder and delight in every 

 collection of tender aquaties in the North. The curious 

 l.Iadd.-rs made by tin- inflation of the petioles help the 

 plant t.) th.at frrclv. -Mi.Mit flowering time the plant 

 s.ihIs .l.iwn aiich<priii^' r.i.its which, if the water be only 

 :! .ir 4 iiH-lirs d.r)., |..ni tratt- the soil. The tree Hya- 

 cinths billing in ail allied order ; the Pickerel-weed, in 

 the allied genus Ponteeleria, the ovary of which by 

 abortion is 1-celled, and each cell 1-ovuled, while Eich- 

 homia is 3-celled and many-ovuled. 



The plants of this order have been greatly confused 

 by botanists, partly because the fugacious, membranous 

 flowers are not well preserved in dried specimens, 

 and partly because of variation in form of leaves, 

 depending upon whether the plants grow in deep or 

 shallow water, or in mud. The common Water Hya- 

 cinth sends out two kinds of roots, the horizontal ones 

 often thick and fleshy, and apparently for reproductive 

 purposes, the vertical ones long, slender, and clothed 

 with innumerable small, horizontal fibers. Water Hya;- 

 cinths are of easy culture and are propagated by divi- 

 sion or seed. If grown in about 3 in. of water, so that 

 the roots may reach the soil, the petioles become elon- 

 gated and the plant becomes weedy and unsatisfactory. 



