hederal 
Hemiepiphyte 
ivy ; (2) resembling ivy in habit ; 
hed’eral, composed of ivy ; hede- 
riferous (fero, I bear), producing 
ivy. 
He’gemon + (7yyeuav, a leader), fibro- 
vascular tissue. 
heliaca‘lis (7j\uakos, belonging to the 
sun), heliacal ; spiral. 
Helichry’sin, the yellow colouring 
matter of several species of 
Helichrysum. 
helic’iform (helix, w snail, forma, 
shape), coiled like a snail shell ; 
Hel’icocarp (xaprés, fruit), Nicotra’s 
term for a fruit whose constituent 
carpels are male ed in a se 
helicogy’rate, helicogy’rates (gy- 
ratus, turned in a circle), having a 
ring carried obliquely round, as the 
annulus in some Ferns ; hel’icoid, 
helicoid’eus (el5os, like), coiled into 
a helix, or like a snail-shell; ~ 
Cyme, a sympodial inflorescence 
whose lateral branches are al) de- 
veloped on one side, a bostryx, 
or drepanium; in some text- 
books this is erroneously called 
‘scorpioid’; ~ Dichot’omy, when 
in two unequal branches, the 
more vigorous one is uniformly 
on the same side; ~ Inflores’- 
cence, when the flowers are in a 
single row; ~ unip’arous Cyme, 
a bostryx; helicoi’dal, spirally 
twisted, in the manner of a snail- 
shell. 
helioph’obic (jAcos, the sun, doféw, 
I dread), shunning the light, nega- 
tively heliotropic ; Helio’sis, injury 
done by sun- -burn ; _ Heliotor’tism 
(tortus, twisted), torsion caused by 
incidence of light (Schwendener and 
Krabbe) ; —heliotrop'ic (tr pd7ros, 
direction), turning towards the 
light; ~ An’gle, the angle of inci- 
dence at which light has the most 
stimulating effect ; Heliot’ropism, 
the act of turning towards the sun 
or source of light; neg’ative ~, 
shunning light; pos‘itive ~, 
growing in the ‘direction of the 
light ; trans’verse ~, = DIAHEI.O- 
TROPISM, 
119 
heliozo’oid (jj\cos, the sun, {Gov, an 
animal, eldos, like), amoeboid, but 
having distinct ray-like pseudo- 
podia. 
Hel’met, = GALEA; ~ shaped = 
galeate. 
helo’bious (é\os, a marsh, flos, life), 
living in marshes, paludal. 
Hel’otism (e/dws, a slave), Warming’s 
term for the relation of the sym- 
bionts in the Lichen thallus. 
hel’volus (Lat. ), pale ochreous yellow ; 
hel’vus (Lat.), light bay, dun- 
colour. 
He’matine = HamMAaTIN. 
Hemeran’thy (juepa, day, dvdéw, 1 
flower), day-flowering. 
hemi- (ju), in composition means 
half ; Hemi-albumose’( + Albumose), 
a mixture chiefly of proto- and 
hetero-albumose ; hemiangiocar’- 
pous (dyyelov, a vessel, Kapzros, 
fruit), when the hymenium of some 
Fungi is for some time covered 
with a membrane, the gonidiophore 
is so termed ; hemianat’ropous (dva, 
up, TpoTN, & turn), half-anatropous, 
the ovule being partially bent 
back, half the raphe free ; hemi- 
tropous, amphitropous; Hemi-- 
aut/ophyte (+ AUTOPHYTE), chlor- 
phyll-bearing parasites (Boulger) ; 
Hem‘icarp, Hemicarp’ium (kapros, 
a fruit), a half-carpel, a meri- 
carp; Hemicell’ulose (+ CELLU- 
LosE), all carbohydrates present 
in the cell- wall which are 
not coloured blue by chlor-zinc- 
iodide, such as pectinaceous sube 
stances, reserve cellulose, etc. 
(Gilson) ; formerly termed Pseudo- 
cellulose; Hemicy’cle (kvxdos, a 
circle), a half-circle, or half-coil ; 
hemicy’clic, partly in whorls, as 
the perianth leaves in whorls, and 
the sporophylls in spirals; hemi- 
cylin’ dric (xvAw5pos, a cylinder), (1) 
half-terete ; (2) a leafy expansion, 
plane on one side, convex on the 
other; Hemidystroph’ia (dvc-, 
bad, zpo¢7, nourishment), partial 
nourishment, semi-starvation in 
plants ; Hemiep’‘iphyte (éml, upon, 
