3l8 GLOSSARY 



heli'um (l\os, marsh), a marsh formation; helad, a marsh plant; helodi'um 

 (eXwSr/j, marshy), a swampy open woodland formation; helodad, a marsh 

 plant; helodrium (Spto?, thicket), a thicket formation; helodrad, a plant 

 of a marshy thicket; helohyli'um (vXrj, forest) a marsh forest formation; 

 helohylad, a marsh forest plant. 



hepodoche (cttw, follow), a secondary succession, 



hizometer (i^w, to sink), an instrument for measuring gravitation water. 



holard (o\os, whole), the total water-content of the soil. 



hydrad {vBpo-, water), a hydrophyte; hydrochore, a plant distributed by water; 

 hydroharmose, response to water stimuli; hydrophyll, the leaf of a 

 hydrophyte; hydrophyte, a water plant; hydrophyti'um, a water plant 

 formation; hydrophilous, water-loving; hydrosta'tic (o-TariKos, stand- 

 ing), completing the succession under hydrophytic conditions; hydro- 

 tropic (rpoTriKos, turning), applied to successions which become mesophytic. 



hygrome'tric (uypt's, wet), measuring or absorbing water; hygroscopic 

 (o-jcoTTco), look), measurable only by a hygroscope; able to absorb moisture, 



hyU'um (vXrj, forest), a forest formation; hylad, a forest plant; hylocolum, 

 dwelling in a forest; hyiodi'um (vA.coS>;s, wooded), a dry open woodland 

 formation; hylodad, a plant of this formation; hylophyte, a forest plant, 



hypsi'um (vi/^os, elevation), a succession caused by elevation, 



-ile (locative affix), sufitix denoting a society, 



immobile, without effective devices for migration, 



indigenous {indigetia, sprung from the land), native. 



insolation, exposure to intense heat and light, 



isabellinus, leather-colored, 



isolation, separation by barriers. 



isopho'lic (taos, equal), equally illuminated; isophotophyll, a leaf in which 



both halves of the chlorenchym are alike, due to equal illumination, 

 -ium (-cTov, locative affix), suffix denoting a formation, 



labile, plastic, easily modified, 



lauri'um (Xaupa, drain), a drain formation; laurad, a drain plant. 



limni'um (Xcfivrj, lake), a lake formation; limnad, a lake plant; limnodium 



(Ai/iva8s, marshy ground), a salt marsh formation; limnodad, a plant of 



a salt marsh. 

 lochmi'um (Xoxm^, thicket), a thicket formation; lochmad, a thicket plant. 

 lophi'um {\6<f>os, crest, hill), a hill formation; lophad, a hill plant; lopho- 



spore, a plant with plumose disseminules. 



mastigospore (fiaarri$, lyo?, lash), a plant with ciliate or flagellate disseminules. 

 melleuA, honey-colored. 



