Isocoenosiai!) 



Layering 



Isocoeno'sium, pi. -ia, an associa- 

 tion composed of Isocies ; Isoo'ryma 

 (K-pu/id?, frost), winter isotherm 

 (Setchell) ; Isoelec'tric Point 

 {■/jXcicrpov, amber), the point of 

 absolute neutrality as regards 

 hydrogen-ion concentration ; Iso- 

 hy'et (uerds-, heavy rain), term for 

 rainfall in climatic observation on 

 plants ; lines of equal rainfall ; 

 Isoho'lotype (+ Holotype), speci- 

 men taken in after years from the 

 type bush or tree (Wilmott) ; 

 i'sokont {kovtos, a pole), both 

 flageUa equal (Church) ; Isolater- 

 al'ity (+ Laterality), having both 

 sides exposed to light; Isolect'o- 

 type (+LECTOTYPE), specimen taken 

 from a chosen, type long after pub- 

 lication (Wilmott) ; Isomast'igote 

 {^dcm^, fidcrTiyos, a whip), having 

 two or four flagella of equal length ; 

 isomeris'tic {n-^pos, a part), agreeing 

 in number of parts ; Isom'ery is 

 the state ; Isophene' {<f>aLvw, I 

 show), applied to districts of equiva- 

 lent phenologic date with their 

 area; I'sopore, add, (2) a swarm 

 spore or gamete ; isosmo'tic ( + 

 OSMOTIC), having the same osmotic 

 pressure (Stiles) ; isost'ichoos 

 [ariKos, a row), when the rows in 

 the stem-cortex of Chara are equal ; 

 isosty'led (oruAo?, a column), equal 

 styled (Errera) ; isoton'ic, having 

 the same osmotic concentration 

 as the cell -sap (Stiles). 



-ite, -ites (-ittj?, belonging to), suffixes 

 denoting like or nature of, used in 

 forming names of fossil plants and 

 animali. 



iterative {iteratio, a repeating), re- 

 peating when applied to crosses 

 (B. M. Davies) ; -itis, inflammation. 



Jacket-cells, cells surrounding the 

 nucellus in Thuya Linn. (Land). 



Jor'danon (Jordan, ovra, things exist- 

 ing), " a form which breeds true 

 to type but may not be termed a 

 species" (Lotsv); Alexis Jordan 

 (1814-97) pubhshed many micro- 

 species ; C/V LiNNEANON. 



Junce'tum, an association of Junc'us, 



Linn. 

 Junipere'tum, a similar group of 



Junipers. 



Ealahar'i Re'gion, in South Africa 



between the Orange River and 



Bechuanaland (Bews). 

 kar'roid, Karroo-like (Schonland) ; 



Ear'roo, a region in South Africa, 



dry and continental in character 



(Bews). 

 Karyomer'ites, cf. Cakyomerites. 

 Eatlon, cf. Cathion. 

 Khor, a waste of stony desert. 

 Ein'ase, a complex organic body 



which incites to enzymic energy. 

 Enobs, add, (2) the tubers of terrestrial 



orchids (J. E. Smith). 



Laberium-pel'ory, when an orchid- 

 flower becomes symmetrical (Wors- 

 dell). 



Lag Phase, the initial phase in the 

 growi;h of the yeast plant. 



Lameriae, add, (2) layers of mem- 

 brane in the oospore of Charads. 



lancea'te, somewhat lanceolate, but 

 wider at the base than at the 

 middle. 



Larice'tum, an association of Larix, 

 Toum. 



La'tent Per'iod, the time between the 

 incidence of stimulus and the begin- 

 ning of the responsive movement 

 (Bose). 



Lat'eral Ar''ea, a smooth place in a 

 diatom valve, sometimes parallel 

 to the axis, but nearer the margin 

 (West). 



Lat'erites {later, a brick), tropical 

 argillaceous soils, under a heavy 

 rainfall of at least 50 inches annually 

 (Tansley and Chipp). 



Lat'tices, abortive and lateral sieve- 

 plates in Angiosperms (Jeffrey). 



Lanrifrutice'ta, thickets with pre- 

 dominance of evergreens (Riibel). 



Lay'er Soci'eties, growths in layers, 

 as of standards with bushes lower 

 down, and herbs beneath all ; 

 ~ Trans'ect, cf. Bisect; Lay'er- 

 ing, add, (2) R. C. Rose's term for 



446 



