318 GLOSSARY 
heli’um (20s, marsh), a marsh formation; helad, a marsh plant; helodi’um 
(é\a8ys, marshy), a swampy open woodland formation; helodad, a marsh 
plant; helodrium (8pios, thicket), a thicket formation; helodrad, a plant 
of a marshy thicket; helohyli’um (%Ay, forest) a marsh forest formation; 
helohylad, a marsh forest plant. 
hepodoche (éw, follow), a secondary succession, 
hizometer (iZw, to sink), an instrument for measuring gravitation water. 
holard (8dos, whole), the total water-content of the soil. 
hydrad (é8po-, 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 (crazies, stand- 
ing), completing the succession under hydrophytic conditions; hydro= 
tropic (rpomicés, turning), applied to successions which become mesophytic. 
hygrome’tric (éyp¢s, wet), measuring or absorbing water; hygroscopic 
(oxoréw, look), measurable only by a hygroscope; able to absorb moisture. 
hyli’um (4Ay, forest), a forest formation; hylad, a forest plant; hylocolum, 
dwelling in a forest; hylodi’um (iAedys, wooded), a dry open woodland 
formation; hylodad, a plant of this formation; hylophyte, a forest plant. 
hypsi’um (ios, elevation), a succession caused by elevation. 
=ile (locative affix), suffix denoting a society. 
immobile, without effective devices for migration. 
indigenous (zzdigena, sprung from the land), native. 
insolation, exposure to intense heat and light. 
isabellinus, leather-colored. 
isolation, separation by barriers. 
isopho’tic (icos, equal), equally illuminated; isophotophyll, a leaf in which 
both halves of the chlorenchym are alike, due to equal illumination. 
-ium (-cov, locative affix), suffix denoting a formation. 
labile, plastic, easily modified. 
lauri’um (Aavpa, drain), a drain formation; laurad, a drain plant. 
limni’um (Aéuvy, lake), a lake formation; limnad, a lake plant; limnodium 
(Aiwv@8es, marshy ground), a salt marsh formation; limmodad, a plant of 
a salt marsh. 
lochmi’um (A¢cxu7, thicket), a thicket formation; lochmad, a thicket plant. 
lophi’um (Ao¢os, crest, hill), a hill formation; lophad, a hill plant; lopho- 
spore, a plant with plumose disseminules. 
mastigospore (pdorié, vyos, lash), a plant with ciliate or flagellate disseminules. 
melleus, honey-colored. 
