Hypnetum 
(SUPPLEMENT) 
inhibited 
Hypne’tum, a plant-association com- 
posed of Mosses, especially of 
Hypnum, and its allies. 
Hyp‘noplasy (7Adow, I shape), arres- 
ted development due to various in- 
hibiting reactions, which prevent 
the cells or tissues attaining 
normal size (Kiister); Hyp’no- 
sporange (+ SPORANGE), a pro- 
duct of the modification of the 
root of Botrydium, a sporangium 
which produces zoospores after a 
resting period (Rostafifiski). 
Hy’poachene (+ ACHENE), an achene 
from an inferior ovary (Villari) ; 
Hypoascid’ium (+ Ascrp1uM), afun- 
nel-shaped growth, the inner sur- 
face corresponding with the lower 
surface of the metamorphosed leaf 
(C. de Candolle) ; Hyp’oblast = 
Hyposiastus ; hypoder’mal Cell, 
the apical cell of the nucellus giving 
rise to the embryo-sac; hypoder’ 
micZone, Bastit’s termf rstructure 
described by him in the scales of the 
rhizome of certain Mosses distinct 
from the bundle in the mid-rib; 
Hypog’yny, the condition of pos- 
sessing hypogynous flowers ; hypo- 
pel’'tate (+PELTATE) applied to a 
phyliome having the base of the 
limb on the inferior face; ¢f. EPI- 
PELTATE (C. de Candolle) ; Hy’po- 
physe, ~ Cell, = Hyporuysis; hy- 
pophyllop’odous (gvAdoy, a leaf, 
mous, a foot), radical leaves present 
when flowering, but not numerous ; 
used of certain Hieracia ; of. PHYL- 
LOPoDoUS ; Hy’posperm (o7épya, a 
seed), the lower part of an ovule 
or seed, below the level where the 
integument becomes free from the 
nucellus (F. W. Oliver); Hy’po- 
state (crdo.s, a standing), = Hyro- 
SPERM ; hypostom’atous, stomata 
confined to the lower surface ; Hy’- 
pothece = HyPoTHECIUM. 
Hyp’sium, or Hyp’sion (v1, aloft), 
succession of plants by elevation 
(Clements). 
hysterogenet’ic = HYSTEROGENIC ; Hy- 
st’erostele (+ STELE), a stele which 
is supposed to be reduced in struc- 
ture, as in Hippuris and Potamo- 
geton (Brebner). 
Hystrel'la (vcrépy, the matrix), a 
synonym of CARPEL, 
idioandrospor’ous (‘é:os, peculiar, + 
ANDROSPORE), when dwarf-males 
of Oedogoniaceae are produced 
from zoospores contained in certain 
cells of neuter individuals (Witt- 
rock) ; Idiot’ery (répas, a monster), 
Gubler’s term for a monstrosity 
which is peculiar to the individual ; 
cf. TAXITERY ; idiotyp’ic (ru7os, a 
type), sexual (Radlkofer); the 
condition in Idiot’ypy; ¢f. zELo- 
TYPIC. 
Immotiflor’ae (immotus, motionless, 
flos, floris, a flower), Delpino’s 
term for wind- fertilized plants 
whose flowers are steadily fixed. 
Impregna’ting Tube, an outgrowth 
from the antheridium of Pythium, 
which penetrates the periplasm to 
the surface of the oosphere. 
Impregna tion, gen’erative, the fusion 
of the generative nucleus with the 
egg; vegeta'tive~, Strashurger’s 
term for the fusion of the polar 
nuclei, either with each other or 
with one of the generative 
nuclei. 
Incrusta’'tion (incrustatio, an encas- 
ing), fossils encased in mineral sub- 
stance, with the actual tissue 
wanting ; casts which give impres- 
sions of markings or cavities, but 
show no organic structure. 
Indehis’cence (in, negation, + DExI- 
SCENCE), not opening, as of fruits 
which remain closed at maturity. 
Indimul’sin, an enzyme producing 
indigo in the leaves of Indigofera. 
Infection Lay’er, a patch of hyphe 
near the base of the scutellum in 
Lolium temulentum (Freeman). 
infracuta’neous (cutis, skin), below 
the surface, subepidermal; in- 
frano’dal (+ NODAL), below a node. 
inhib/ited, used by J. F. Clark for 
spores, not killed, but whose ger- 
mination has been prevented by 
the use of certain solutions, 
332 
