Heterodichogamy 
(SUPPLEMENT) homalocladous 
(Secu0s, a bond), used when the allelomorphic gametes” (Bate- 
vascular bundles are partly of son) 
phloem only (Brebner); cf. Homo- 
DESMIC ; Heterodichog’amy ; Engler 
and Prantl’s synonym for DicHo- 
GAMY; Heterodi’ode (+DiopE), a 
term to include Macropiopz and 
Micropiopze (Van  Tieghem) ; 
Heterodisty'ly, dimorphism, as in 
Primula elatior, Jacq.; adj. hetero- 
disty’lous ; heterodynam’ic (diva- 
pus, power), applied to pairs of 
characters, one dominant, the other 
recessive (Correns); Heterogen’esis, 
(2) the origin of organisms from 
different genera or orders, or de 
novo (Bastian); Heteroli’cheni (+ 
Licuen), Lichens in which the 
gonidia are stratified in the thallus 
(Jatta); Heterom’erals, Bessey’s 
abbreviation for the Heteromerae 
of Bentham and Hooker, a series 
of Gamopetalae ; Heteromer’icarpy 
(xapros, fruit), heterocarpy occur- 
ring between parts of the same 
fruit (Delpino); Heteromorpho’sis 
= AITOMORPHOSIS in botanic usage; 
Heteromorph'ism, the heteromor- 
phic condition; Heteromesog’amy 
(uéoos, intermediate, -yduos, mar- 
riage), when individuals vary in 
the method of fertilization, as (a) 
auto-allogamous, (b) homodicho- 
gamous, and (c) dientomophilous ; 
heteroph’agous (¢dyw, I eat), ap- 
plied to Fungi which attack plants 
not congeneric (Eriksson) ; hetero- 
tac’tic (raxrixds, qualified to ar- 
range), with more than one system 
in the same inflorescence ; hetero- 
thal'lic (@a\Xéds, a sprout), employed 
by Blakeslee for dioecious, in Mu- 
corineae; Heterotristy’ly, trimor- 
phism, as in Lythrum Salicaria, 
Linn. ; Het’erotroph, (1) employed 
by Pfeffer to denote a pure sapro- 
phyte; (2) an organ which is 
developed more on one side than 
another (Wiesner); adj. hetero- 
troph‘ic ; heterotyp’ic, (2) employed 
to denote vegetative division ; 
Heterozy’gote (+ ZyGorE), a ‘‘zy- 
gote formed by a pair of opposite 
hexacot’ylous, having apparently six 
cotyledons due to fission of the 
normal two (De Vries) ; hexacy’clic 
(kv«dos, a circle), arranged in six 
whorls; hexaphylet’ic (gvAv, a tribe), 
applied to those derivative hybrids 
which are the product of six forms 
or species, as in some willow- 
hybrids. 
Hid‘roplank’ton (ldpas, sweat, + 
PLANKTON), organiems which float 
by virtue of some secretion (Forel). 
Hieraciol’ogist (Adyos, discourse), an 
expert in the genus Hieracium. 
Hinge, a special part of the stem 
near a node, between two rigid 
portions, capable of movement 
(Kohl); ~ plants, plants thus sus- 
ceptible to curvature. 
his’tioid (eldos, resemblance), arach- 
noid (Heinig); histoph’ilus (¢i\éw, 
I love), parasitic ; Histophy’ta 
(purov, a plant), parasites; Histo- 
phy’tia, parasitic plant formations 
(Clements). 
Hof (Germ., a court), (1) the areola 
of a bordered pit; (2) Rosen’s ex- 
pression for a clear, granule-free 
space surrounding the nucleus or 
nucleolus. 
holocar’pous (xapros, fruit), used of 
Fungi producing fruit once only from 
the same thallus; cf. EUCARPOUS. 
holochlamyd’eous (xAapvs, a cloak), 
employed for ovules such as 
those of Gingko when the integu- 
ments are practically complete 
(Celakovsky) ; holocy’clic (xuxAcxés, 
circular), applied to a stem with 
amplexicaul leaves, regarded as en- 
circling the stem and ending at the 
node in a leaf (Gelakovakg) ; Holo- 
g’amy (yduos, marriage), when the 
nuclei of gametes fuse together 
(Dangeard) ; Holopar’asite (+ 
Parasite), a plant entirely de- 
pendent upon the host-plant for 
its existence (Warming). 
homaloclad’ous, -dus (xdddos, a 
branch), Russow’s term for straight- 
branched. 
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