Sulci 



Synnsia 



Sul'ci, add, (3) = Fossulae. 



Solphore'tum, a natural, ecological 

 community of sulphur bacteria. 



Sum'mit, an old term for Stigma. 



Sun'scald, injury due to too brilliant 

 sunlight; Son 'scorch, the burning 

 of foHage when the soil is parched. 



Su'persez, ratio of chromosomes, 

 2j: : 2 = female, x :2 = male ; 

 2x : 3, an intermediate, the inter- 

 sex or supersex (Bridges). 



suprava'sal (+ vasal), when situated 

 opposite the xylem-groups in the 

 wood (Solereder). 



Suspen'sory Bod'ies (Molisch) = 



PSEUDO VACUOLES. 



Symbas'is, add, free intercrossing lines 

 of descent (0. F. Cook). 



Sym'biophiles, pi. (^tAccu, I love), free 

 mycorrhiza of hymenomycetous 

 fungi, neither parasites nor sapro- 

 phytes (Rayner). 



Symbio'sis, add, defined by Mc- 

 Dougall as I. conjunc'tive ~ ; 

 and II. disjunc'tive ~, with further 

 divisions of each, as nu'tritive ~, 

 with antagonis'tic ~ and recip'rocal 

 '^ as forms ; Sym'pode, Sympod'- 

 ium, add, it may be acranthous 

 ~ or pleuranthous. 



Symptomatorogy (au/iTrroj/xa, mis- 

 chance ; Adyo?, discourse), the 

 science of the signs of disease ; 

 Symphys'iology (+ Physiology), 

 the science of correlation (Gams). 



Synandrod'ium, applied to the im- 

 perfect flower of the aroid Man- 

 gonia Schott. 



Synanth'ody, side-growth of two 

 flower-heads on the same stalk, or 

 on two long-drawn-out stalks 

 (Penzig). 



Synap'sis, add, by recent observers 

 used for the entire period from the 

 contraction of the nucleus until 

 the spireme segments into chromo- 

 somes (Gates) ; Synaptosper'my 

 {oTT€pfxa, a seed), plants with seeds 

 germinating close at home, instead 

 of being dispersed at maturity 

 (Murbeck) ; Synchororogy {xc^peo}, I 

 spread abroad ; Xoyos, discourse), 

 distribution of plant associations 



(Riibel) ; adj. synchorolog'ic, as 

 ~ Geobot'any, or ecology in a wide 

 sense ; Synchronorogy {xpovos = 

 time), plant distribution in time, 

 that is, fossil species and their 

 duration during geological periods 

 (Gams); Syncot'yls = Synco- 



TYLEDONS. 



Syndin'ial Mito'sis, in the peridinial 

 genus Syndin'ium, taking place 

 without an achromatic spindle 

 being formed, the chromosomes 

 breaking apart (Chatton). 



Synecol'ogy (+ Ecology), (1) the 

 relation between the plant asso- 

 ciation and its habitat (Riibel) ; 

 (2) the ecology of communities 

 (Turesson) ; dynam'ic or genetic ~, 

 the study of plant communities 

 as the result of biotic factors ; 

 geograph'ic ~, distribution of 

 plant communities influenced by 

 factors of environment ; morpho- 

 log'ical and physiolog'ical ^, 

 physiognomy, ecologic structure 

 and floristic composition of plant 

 communities as related to factors 

 of environment (Waterman) ; adj. 

 synecolog'ic ; Syngam'eons {yatios, 

 marriage), pairing communities, 

 frequently taken for superspecies, 

 formerly styled Linneons. 



Syngen'esis [ovyyevrjs, of same de- 

 scent), (1) formation of the embryo 

 in sexual reproduction of male 

 and female elements ; (2) the origin 

 of a species in mass (Stephanos) ; 

 Syngenet'ics, change of plant asso- 

 ciations (Riibel) ; syngenet'ic Geo- 

 bot'any = Synecol'ogy, the ecologic 

 investigation of plant communities 

 (Schroeter). 



syn'gynous, epigynous ; Syn'gyny, 

 epigyny. 



Synize'sis add, {awl^-qms, collapse), 

 distinguished by Gates from 

 Synapsis for its tightly contracted 

 phase of the nucleus. 



Synkar'yon {Kapvov, a nut), the 

 fusion of pronuclei in the zygote 

 (Minchin). 



Synu'sia, pi. -ae, sometimes printed 

 as Synu'sium, pi. -ia {avvovaia, a 



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