hederal 



Hemiepiphyte 



ivy ; (2) resembling ivy in habit ; 

 hed'eral, composed of ivy ; nede- 

 rif erous (fero, I bear), producing 

 ivy. 



He'gemon J (r^y^tJov, a leader), fibro- 

 vascular tissue. 



heliaca'lis (-^Xia/coy, belonging to the 

 sun), heliacal ; spiral. 



Helichry'sin, the yellow colouring 

 matter of several species of 

 Helichrysum. 



helic'iform (helix, a snail, forma, 

 shape), coiled like a snail shell ; 

 Hel'icocarp (KapTrbs, fruit), Nicotra's 

 term for a fruit whose constituent 

 carpels are arranged in a spiral ; 

 helicogy'rate, helicogy' 'rates (gy- 

 ratuSy turned in a circle), having a 

 ring carried obliquely round, as the 

 annulus in some Ferns ; hel'icoid, 

 helicoid'eus (elSos, like), coiled into 

 a helix, or like a snail-shell ; ~ 

 Cyme, a sympodial inflorescence 

 whose lateral branches are all de- 

 veloped on one side, a bostryx, 

 or drepanium ; in some text- 

 books this is erroneously called 

 ' scorpioid ' ; - Dichotomy, 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. 



belioph'obic (??Xtos, the sun, 0o/3<k>, 

 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 (rpo-n-os, 

 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 ; negative ~ , 

 shunning light; pos'itive ~, 

 growing in the direction of the 

 light ; trans'verse ~, = DIAHELO- 

 TROPISM. 



119 



heliozo'oid (^Xios, the sun, {uov, an 

 animal, eldos, like), amoeboid, but 

 having distinct ray-like pseudo- 

 podia. 



Hel'met, = GALBA ; ~ shaped = 

 galeate. 



help'bious (2Xos, a marsh, /3ios, life), 

 living in marshes, paludal. 



Hel'otism (el'Xws, a slave), Warming's 

 term for the relation of the sym- 

 bionts in the Lichen thallus. 



hel'volus (Lat.), pale ochreous yellow ; 

 nel'vus (Lat.), light bay, dun- 

 colour. 



He'matine = HABMATIN. 



Hemeran'thy (^epa, day, dvetu, 1 

 flower), day-flowering. 



hemi- (rjfju), in composition means 

 half; Hemi-albumose't+Albumose), 

 a mixture chiefly of proto- and 

 hetero-albumose ; hemianglocar'- 

 pous (ayyeiov, a vessel, *rap7ros, 

 fruit), when thehymenium of some 

 Fungi is for some time covered 

 with a membrane, the gonidiophore 

 is so termed ; hemianat'ropous (dy&, 

 up, Tpo-rri), a turn), half-anatropous, 

 the ovule being partially bent 

 back, half the raphe free ; hemi- 

 tropous, amphitropous ; Heml- 

 aut'ophyte (+ AUTOPHYTE), chlor- 

 phyll-bearing parasites (Boulger) ; 

 Hem'icarp, Hemicarp'ium (icapiros, 

 a fruit), a half-carpel, a meri- 

 carp ; HemicelTulose ( + CELLU- 

 LOSE), all carbohydrates present 

 in the cell - wall which are 

 not coloured blue by chlor-zinc- 

 iodide, such as pectinaceous sub- 

 stances, reserve cellulose, etc. 

 (Gilson) ; formerly termed Pseudo- 

 cellulose ; Hemicy'cle (/okXo?, 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 (/ctfXti/5/3os, a cylinder), (1) 

 half -terete ; (2) a leafy expansion, 

 plane on one side, convex on the 

 other ; Hemidystrophla (5u<r-, 

 bad, rpoQiij, nourishment), partial 

 nourishment, semi-starvation in 

 plants ; Hemiep'iphyte (eirl, upon, 



