halophilus 
(SUPPLEMENT) 
Helotism 
which shuns salt; haloph’ilus 
(@Aéw, I love), salt-loving ; Halo- 
phy’ta (gurdy, a plant), salt plants ; 
Halophy’tia, plant associations of 
salt marshes. 
Haplan’the (dv07, a blossom), Hux- 
ley’s term for the hypothetic 
anemophilous type of the flowers 
of Gentianaceae ; ¢f. Journ. Linn. 
Soc., Bot. xxiv. (1887), 112, 122; 
Haplobacte’ria( + BaorERiA),simple 
bacteria, colonies and cells in ag- 
gregation, the product of division 
asin Sarcina; haplocau’lous (caves, 
astem), having a simple unbranched 
stem ; haplolepid’eous, the prefer- 
able form of APLOLEPIDEOUS; 
Haplomer’istele (+ MErRISTELE), 
a simple stele consisting of 
an axial series of tracheae sur- 
rounded by a ring of phloem; adj. 
haplomeriste’lic (Brebner) ; Haplo- 
mito’sis (+ Mrrosis), nuclear divi- 
sion by transverse rupture (Dan- 
geard). 
Hap’tere, MacMillan’s term for Hap- 
TERON, a holdfast; hapter’ic, of 
the nature of w holdfast ; Hapto- 
tropism (rpéros, direction), the 
curving of tendrils and similar 
organs (Fitting). 
harpid‘ioid, (1) resembling or allied 
to the Harpidium section of Hyp- 
num ; (2) similarly the Lichen genus 
Harpidium. 
Haustor’‘ium, (2) a structure arising 
from the secondary nucleus of 
Lathraea,the embryo sac contain- 
ing two haustoria, one equatorial, 
the other micropylar (Chodat) ; 
Haustoria (pl.) appendicula’ta, 
when they arise from a protrusion 
of the hyphae, an appresson ; 
~ exappendicula’ta, when they arise 
directly from the hyphae without 
much contortion at the point of 
origin; ~ lobula’ta, lobed ap- 
pressors. 
He'derose, a sugar contained in ivy, 
Hedera Helix. 
Hed‘ium, or Hed’ion (é60s, » base), a 
succession of plants on residuary 
soils (Clements). 
327 
Hekis’totherm (#xioros, the smallest, 
6épun, heat), a plant which needs 
but little heat, and can withstand 
long periods of darkness (Warming). 
Heleoplank’ton, or Helei’oplankton 
(€Xos, a marsh, + PLANKTON), the 
floating vegetation of marshes, 
which overpowers the animal 
plankton ; it differs from Potamo- 
plankton by less motion of the 
water (Zimmer), 
hel‘icoid Cells, terminal cells, which 
are usually branched, of Pitho- 
phora (Wittrock). 
helioph’ilous, -us (¢iAréw, I love), 
adapted to full expwsure to the 
sun ; helioph’obous (¢oféw, I fear), 
adapted to a very small amount 
of light; Heliophy’ta (gurdy, a 
plant), plants adapted to full sun- 
light ; Heliophy’tia, formations of 
such plants (Clements). 
Hel‘ium, a marsh formation ; helo- 
ph‘ilus (¢:Aéw, [love), marsh-loving; 
Helophy'ta (gurov, a plant), marsh 
plants (Clements). 
helminth’oid (@\y.vs, a worm, «dos, 
resemblance), worm-shaped, vermi- 
form (Heinig). 
helminthospor’oid (eldos, resemblance), 
resembling the genus Helmintho- 
sporium, Pers. 
Helohy’lium (dos, marsh, 7, forest), 
a swamp forest formation ; helo- 
hyloph’ilus (¢:A¢w, I love), dwelling 
in wet forests; Helohylophy’ta 
(purov, a plant), wet forest plants 
(Clements) ; Heloloch’mium (Aéxpu7, 
a thicket), a meadow thicket for- 
mation; helolochmoph’ilus (¢.Aew, 
I love), dwelling in meadow 
thickets ; Helolochmophy’ta (¢urov, 
a plant), meadow thicket plants 
(Clements) ; Helorgad’ium (é)os, 
marsh, dpyas, meadow), swamp 
formation (Ganong) ; helorgado- 
ph‘ilus (¢vAéw, I love), dwelling in 
swampy woodlands; Helorgado- 
phy’ta (g¢urcv, a plant), plants of 
that formation (Clements). 
Hel’otism (eidws, a serf), Warming’s 
term for the symbiotic relations of 
Algae and Fungi in Lichens. 
