Fragmentation 



Geobotany 



dition of breaking up before crossing 

 over (R. T. Hance). 



Fre'quency, the degree of common 

 occurrence of a species; adj. 

 fre'quent. 



Frigorideser'ta, add, tundra. 



Fron'dome, the abstract entity of a 

 Fbond, corresponding to the allied 

 Caulome and Phyllome (Vuille- 

 min). 



Fn'cin, a special substance in the cell- 

 wall of Fucus Linn. (Czapek). 



Ful'crum (Lat. bed-post), in lichens 

 the Spoeophore (A. L. Smith). 



Fun'goid, add, (2) phanerogamous 

 parasites whose autotrophic mother- 

 group is unknown, but distinguish 

 themselves by their fungus-like 

 habit (Johow). 



Fu'ture Genera' tions, an expression 

 employed by Buller to denote 

 successive generations of Basidia. 



Gallorubro'nes, pi. {galla, oak-apple; 

 rubor, redness), red pigments from 

 plant-galls (Mierenstein). 



Game'tocyte {kvtq?, a hollow vessel), 

 a mother-cell of gametes (Minchia) ; 

 Gametogen'esis, add, (2) restricted 

 to mere fusion of gametes (West) ; 

 Gametogonid'ium (+ Gonidium), 

 the initial plastids of gametes in 

 Volvox (Janet). 



Gam'o-gem'mie (sic), the " intimate 

 association of two or several 

 floral rudiments " (Worsdell) ; 

 Gamog'ony {yovos, race) = 

 Sporogony ; Gam'ont, a gamete- 

 producing form; c/. Spokont; 

 Gamom'ery {n-^pos, part), when 

 normally distinct petals are joined 

 into a gamopetalous corolla (Engel- 

 mann). 



ga'ping, ringent : Gaps, add, (2), 

 branch ~, fo'liar ~, or leal ~, 

 when openings exist in the si- 

 phonosteles to permit the passage 

 of vascular tissue to form branch 

 or leaf (Jeffrey). 



gashed [monosyli.], lobcd. 



Gastre'a (yo-(^'''TJp, the belly), consists 

 of a Depea with feeding area, 

 surrounded by a sac with communi- 



cation outside by a blastopore 

 (Janet). 



Gel, a solid formed from a jelly by 

 heat or chemical reagents and 

 irreversible by the addition of 

 water ( Addams) ; gel'ate, to become 

 coagulated. 



Gem'ini (Lat. twins), applied to 

 pairs or bivalent chromosomes 

 (Fisk). 



Gemmipar'ity, used of leaves arising 

 from adventitious buds (Penzig). 



Genecol'ogy, ecology concerned chiefly 

 with species; adj. genecolog'ical ; 

 Genetic Coeffic'ient, or dynamic 

 behaviour, the part played by the 

 species in the development of the 

 community ; cf. Geobotany ; 

 Genet'ics, the study of heredity 

 and variation (Bateson) ; Genet'- 

 icist, a student of genetics. 



Genera'tions, pi. add, (2) of basidia 

 ranked as com'ing ~, fu'ture ~, 

 past ~, pres'ent ~, according to 

 their state of growth (Buller). 



gen'ic, relating to genes; Gen'ophene 

 {<f>alvw, I appear), a reaction type 

 of a genotype; Genospe'cies ( + 

 Species), embodies the facts of the 

 genotypical construction of the 

 ecospecies; (1) a homozygotic bio- 

 type (Raunkiaer) ; (2) a geno- 

 typical construction of a Linnean 

 species (Turesson) ; Gen'otype 

 {tvttos, a type), Mendelian sub- 

 units of the genospecies, as the 

 ecotypes are to the ecospecies, i.e. 

 local species (Turesson) ; ~ Com- 

 p'oonds, products of recombined 

 Mendelian factors (Turesson) ; adj. 

 genotyp'ical. 



-gen'ous, Clements's suffix for " pro- 

 ducing." 



Gentiacau'line, a glucoside from 

 Gentiana acaulis Linn. 



Geobi'ont (jSto?, life ; ovra, things 

 existing), an inhabitant of the 

 soil, as an alga or moss, in a wider 

 sense, all soil-nurtured plants ; 

 Geobot'any {poTdmrj, pasture, grass), 

 phyto-geography ; plant distribu- 

 tion (Grisebach) ; (1) divided by 

 J. Pavillard into (a) ecolog'ic ~, 



439 



