Heliophobous Refers to organisms which grow best in the shade. Syn. Sciophyllous, Shade plant.
Heliotropic See Phototropic.
Helminth
A
worm, usually
parasitic.
Helophyte One of Raunkiaer's plants whose e.g.,
Life-form classes, consisting of marsh Perennating parts are in the soil under water,
arrow-head,
cf.
Geophyte, Hydrophyte.
Helotism
A
term that has been used for the interaction of two organisms such as an alga and fungus in a lichen. See Mutualism, Parasitism, Symbiosis.
Hematypic Refers to reef-building corals which contain zooxanthellae
and
algal Symbionts.
Hemerocology The ecology of gardens, parks,
land that
fields, cf.
is
modified by
man
such as
Culture community.
Hemerophyte
A
plant introduced into an area by man. community, Exotic, RuderaL
cf.
Culture
Hemicryptophyte One of Raunkiaer's
Life-form classes in which the buds or Perennating parts of plants surviving unfavorable periods are located at the soil surface,
cf.
Cryptophyte, Geophyte,
Chamaephyte.
Hemiepiphyte
A
plant that
is
Epiphytic
(q. v.) for
time.
169
only part of
its life-