GLOSSARY 319 



meridian, used chiefly as a synonym for apparent noon; also an imaginary 

 line of longitude. 



mesad (/xeo-o;, middle), a mesophyte; mesophilous, growing in moist soils; 

 mesophyll, the leaf of a mesophyte; mesophyte, a plant of moist soils; 

 mesophyti'um, a mesophytic formation; mesosta'tx (o-TartKc?, stand- 

 ing), completing the succession under mesophytic conditions; mesotro'pic 

 (rpoTTi/co?, turning), applied to successions which become mesophytic. 



-meter (/xeVpov, measure), combining term for instrument. 



micti'um ((jllktov, mixture), a mixed formation. 



migrant, a plant that is migrating or invading. 



migration {migratio, removal), the movement of plants into new areas; mi- 

 gration circle, a circle employed to measure migration. 



mobile, able to be moved, i. e. , modified for migration. 



monochronic (/acVo?, single, x/'oVos, time), arising but once; monogenesis 

 (yeVccrt;, origin), the origin of a new form at a single place or time; 

 monophyle'sis (^SAov, race), origin from a single ancestral type; mono- 

 to'pic (tottos, place), arising at one place only. 



motile, able to move by growth, by means of cilia, etc. 



mutable, able to produce mutants; mutant, a form arising by mutation; mu- 

 tation, the sudden appearance of new forms. 



namati'um (va/xa, aros, brook), a brook formation; namatad, a brook plant. 

 nomi'um (vo/ao's, pasture), a pasture formation; nomad, a pasture plant. 



occupation, possession of the ground by plants. 



oceani'um (wKeavos, ocean), an ocean formation; oceanad, an ocean plant; 



oceanophyte, an ocean plant; oceanophilous, ocean-dwelling. 

 ocheti'um (oxeros, drain), a succession due to artificial drainage. 

 ochroleucus, yellowish white. 



ochthi'um (6xi>ri, bank), a bank formation; ochthad, a bank plant. 

 oligope'lic (o\tyos, little, tti/Xos, clay), containing little clay; oligopsam'mic 



({(/dfjLixo'i, sand), containing little sand. 

 olisthi'um (oAto-^os, slip), a succession in a landslip, 

 ombrometer (6iJ.ppo<s, a rainstorm), a rain gauge. 

 -on (-WV, locative sufifix), sufhx used to denote a family. 

 oncospore (oy/cos, hook) , a plant with hooked disseminules. 

 orgadi'um (opyas, aSo?, meadowland partially wooded), an open woodland 



formation ; orgadad, an open woodland plant. 

 orophyti'um (opos, mounta'n), a subalpine plant formation. 

 oxodi'um (6|w8?;s, sour), a humus marsh formation; oxodad, a plant of a 



humus marsh. 



