Generations 
Germ 
actively concerned in fertilization; 
Genera’tions, alternation of, see 
ALTERNATION; Gen’erativeNu’cleus, 
see NUCLEUS. 
gener‘ic,gener'icus (genus, birth, race), 
the differences which make the 
genus as opposed to those which 
make the order, or species. 
Genesio!’ ogy (yéveors, origin, Adyos, dis- 
course), the doctrine of the trans- 
mission of qualities from the parent, 
both in vegetative and sexual repro- 
duction (Archer); genetic, genea- 
logical, that which comes by in- 
heritance; ~ Spi’ral, a spiral line 
which passes through the point of 
insertion of all equivalent lateral 
members on an axis, in order of 
age. 
genic’ulate, genicula’tus (Lat., with 
bent knees), abruptly bent so 
as to resemble the knee-joint; 
Genic'ulum, a node of a stem 
(Lindley). 
Genita’lia, Gen’itals (genitalis, per- 
taining to birth), in plants, the 
stamens and pistils, or their an- 
alogues. 
Gens (Lat., a nation), » tribe in 
botany. 
Gen'tianine, the bitter principle of 
Gentiana. 
Genuflec’tion (genu, the knee, flecto, 
I bend), a bend in a conjugating 
filament of an Alga; gen’‘uflexed 
(flexus, bent), bent, as the valves 
of certain Diatoms. 
Gen’us (Lat., a race), the smallest 
natural group containing distinct 
species ; large genera are frequently 
for the sake of convenience divided 
into sections, but the generic name 
is applied to all species ; ~ Hy’brid, 
a hybrid between two genera, a 
bigener or bigeneric cross. 
Ge'oblast, Geoblas’tus (yj, the earth, 
Bdaores, a bud), an embryo whose 
cotyledons remain under ground in 
germination as the pea. 
geocal’ycal, resembling the Hepatic 
genus Geocalyx, Nees ; marsupial. 
Geoaethe’sia (v7, the earth, aicOyors, 
perception by sense), the capacity 
of a plant to respond to the stimu- 
lus of gravity. 
geograph’ic (ypa¢h, writing), descrip- 
tive of the earth or a portion there- 
of; ~ Bot/any, that department 
which takes account of the ~ 
Distribu’tion of plants over the 
earth’s surface; geolog’ic (Adyos, 
discourse) Bot/any = Palaeobotany 
or Fossil Botany; geoph’ilous 
(pirr\éw, I love), earth loving, 
used of such plants as fruit 
underground; ~ Fun’gi, those 
which grow saprophytically on 
decaying vegetable matter on the 
ground ; Ge‘ophytes (¢urov, a plant), 
applied by Areschoug to those 
plants which produce underground 
buds, with perennial development 
there ; geonyctitrop’ic (vit, vuxrés, 
night, tpory, a turning), sleep- 
movements requiring also the 
stimulus of gravity; Geotax’is 
(rdéts, order), movement in plants 
caused by gravity (Czapek); Geo- 
thermom’eter (fepuos, warm, pérpor, 
a@ measure), a thermometer for 
earth temperatures; Geotort’ism 
(tortus, twisted), torsion caused by 
theinfluence of gravitation (Schwen- 
dener and Krabbe); Geot’rophy 
(rpoph, food), unilateral inequality 
in growth due to position with 
regard to gravity (Wiesner) ; geo- 
trop’ic (rpor7, a turning), relating 
to the influence of gravity on grow- 
ing organs; Geot’ropism, the force 
of gravity as shown by curvature in 
nascent organs of plants ; neg’ative 
~ growing away from the earth, 
as stems do normally; pos’itive, 
growing towards the earth’s centre, 
as roots; trans’verse ~, = DIaGKo- 
TROPISM. 
Germ (germen, a bud), (1) a bud or 
growing point; (2) the ovary or 
young fruit; (3) a reproductive 
cell, especially in bacteria; ~ 
Cell, (1) a female reproductive cell ; 
(2) a spore of the simplest character, 
a sporidium (Brefeld); ~ Nu’cleus, 
the nucleus resulting from the 
union of the pronuclei of ‘two 
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