Idiocbromosomes 



Isocies 



Chromosome), used by Church 

 for a pair of x and y chromosomes ; 

 c/. Heterochromosomes ; Idio- 

 ecol'ogy (Schroeter), c/. Auto- 

 ECOLOOY ; Id'iopher {(f>op€cxj, I hear), 

 Siemens's term for Gene. 



-i'es, proposed to denote Consocies, 

 as " Scirpies " (Clements). 



-i'le, locative suffix for Societas {id.). 



imbibit'ional, cf. Imbibition. 



immune' [imynunist exempt), power 

 of an organism to resist invasion 

 by a microscopic parasite (Conn). 



Imp'otence {impotentia, inability), 

 sterile, including floral abortion 

 and arrested development (Stout). 



impu'bes (Lat. immature), not mature. 



Incept', add, oogo'nial ~, an early 

 stage of the oogonium (Pethy- 

 bridge) ; cf. Manocyst. 



inchoate' {inchoatus, unfinished), not 

 complete. 



Incip'ient Nu'cleus, formerly termed 

 " Central Body," " an achromatic 

 ground substance occupying the 

 alveoli of a reticulum in which 

 are located minute granules " 

 (West). 



incompat'ible. Stout's term for sterile ; 

 Incompatibil'ity, the condition men- 

 tioned ; anatom'ical ~, due to 

 structural differences, as herco- 

 gamy ; cross ~, hybridism barred ; 

 physiolog'ical ^, due to some func- 

 tional disability ; self ~, self- 

 sterile. 



Indica'tor (Lat. one that points out), 

 (1) a colour-test for pH or hydro- 

 gen-ion test; (2) Clements'a term 

 for climax and successional com- 

 munities as showing " factors, pro- 

 cesses and practice " ; cf. Plant 

 Indicators ; (3) plants which show 

 no condition of the soil (Tansley 

 and Chipp). 



Indumen'tum, add, (2) bi'strate ~, 

 of two layers, the outer layer, 

 caducous ; u'nistrate '■^, of one 

 layer, persistent (I. B. Balfour). 



Inbib'itor {inhibitus, curbed), cf. Loeb 

 Effect. 



Initia'tion [iniiiatio, admission to 

 rites), the early stages of staminal 



growth, succeeded by the later 

 Extension (Thompson). 



in'ner, add, (2) the morphologic upper 

 surface of a Sphagnum, leaf ( Horrell). 



Inoc'ulum {inoculo, I graft), spores 

 employed for infection. 



inor'dinate [inordinatus, irregular), 

 when spores in an ascus show no 

 regular arrangement. 



interc'alary, add, ^^ Bands, in di- 

 atoms ; ~ Plates, either anterior 

 or posterior in Peridineae ; ~ 

 Valves, in diatoms those with bands 

 having longitudinal septa (West) ; 

 interchromoso'mal (+ Chromo- 

 some), between the chromosomes 

 (De Vries) ; Int'erphase {<f>dais, an 

 appearance) = Interkinesis (Wil- 

 son) ; interpiast'idic, between the 

 plastids and uniting them (Janet) ; 

 Interpola'tion The'ory. suggested in 

 place of Antithetic ; Intersex'es, in- 

 dividuals which display more of a 

 male or female type than is normal ; 

 also styled Supersexes and poly- 

 gamous ; Intersex'ualism, in plants 

 showing alternative development 

 of either sex-organs (Stout) ; Inter- 

 specific Hy'brids, between two 

 given species in characters ; intra- 

 clo'nal (-[-Clone), within the limits 

 of bud-variation ; in'tra-f er'tile, two 

 species fertile between themselves ; 

 in'tra-ster'ile, two species barren 

 between themselves. 



in'tus (Lat. within), the modem 

 term extus is based on this. 



intyba'ceous, akin to or part of 

 Cichorium, Intybaceum Linn. 



Inva'sion, add, Clements defines eight 

 variations of this. 



invi'able (+ viable), short-lived 

 (H. J. Miiller). 



-i'on, add, (2) the lower group to one 

 of the principal associations. 



-is, suffix for AssociES. 



isochi'menal {x^Lf^a, winter weather), 

 applied to lines of winter tempera- 

 tures; isothermal, is the more 

 generally used term ; Isoc'ies, syn- 

 usia showing resemblances, but of 

 various affinities (Gams) ; habitat- 

 groups (Pound and Clements); 



445 



