GLOSSARY 317 
ecballi’um, (é«fd\Aw, cut down forests), a succession due to lumbering. 
echard (éyw, to withhold), the non-available water of the soil. 
edobole (oidos, swelling), a plant whose seeds are scattered by propulsion 
through turgescence. 
efficient difference, the amount of a physical factor necessary to produce a 
change in the response. 
enauli’um (éavdos, hollow channel), a sanddiaw formation; enaulad, a sand- 
draw plant. 
ende’mic (év, within 8juos, district), occurring in a single formation, or natural 
region; ende’mism, the condition of growing in but one natural area. 
epistrophe (ézi, towards, orpo¢, a turning), the arrangement of the row of 
chloroplasts at right angles to the incident light. 
eremi’um (épypos, desert), a desert formation; eremad, a desert plant. 
estival, pertaining to summer. 
-etum (locative suffix), suffix used to denote a consocies. 
eugeogenous (ci-, well, y#, soil), weathering readily to form soil. 
facies, a dominant species of a formation: a distinct area controlled by it isa 
consocies. 
family, a group of individuals belonging.to one species. 
fixity, the condition character.zed by little or no response to stimuli. 
flavovirens, yellow green. 
forewold, equivalent to the German ‘‘vorwald,”’ the thicket zone bordering a 
forest. 
-genous (yévw, to produce), producing. 
geotome (yj, earth, rouy, edge), an instrument for obtaining soil samples. 
gloeospore (yAovds, sticky stuff), a plant with viscid disseminules. 
-graph (ypa¢y, a writing), combining term for a recording instrument. 
gregarious (gregardus, grouped in herds), used of species in which the indi- 
viduals occur in groups. 
habitat, a definite physical area characterized by a formation; habitat form, 
the impress given the plant by the habitat. 
harmosis (dpyoos, an adapting), response to stimuli, comprising both adjust- 
ment and adaptation. 
hedi’um (os, a sitting, base), a succession in a residuary soil. 
heliad (#vos, sun), a heliophyte; heliophyll, the leaf of a sun plant; helio- 
phyte, a sun plant; heliophyti’um, a sun plant formation; heliophilous, 
sun-loving. 
