Hypoxanthin 
imbricated 
(valva, a door), the valve of the 
inner ‘‘shell” or Hypotheca of a 
Diatom (O. Mueller) ; Hypoxan’thin 
(av80s, yellow), a substance akin to 
xanthin, which has been found in 
germinating seeds. 
Hyp’sophyll (ty, high, aloft, pvddov, 
a leaf), a bract of the inflorescence, 
a reduced or modified leaf towards 
the upper end of a shoot, cf 
CaTaPHYLL; Germ. Hochblatt ; 
hypsophyl'lary, relating to bracts ; 
~ Leaf, a bract. 
hys‘ginus (Ucyworv), w red colour, or 
dark reddish pink. 
hysteran’thous, -thus, -this (torepos, 
following, dv@os, a flower), used of 
leaves which are produced after the 
flowers, as in the Almond; 
hysterogen’ic (yévos, race, offspring), 
used of intercellular spaces which 
are formed in the older tissues ; 
Hys’terophyme (¢iua, a tumour or 
excrescence), elementary organs 
which have been mistaken for in- 
dependent animal or vegetable 
organisms (H. Karsten) ; hystero- 
phy’tal (gurov, a plant), fungoid ; 
Hys’terophyte, a plant which lives 
upon dead matter ; a saprophyte. 
ianth’inus (lavOwos, violet colour), 
bluish purple, violet. ; 
iced, having a glittering papillose 
surface, as Mesembryanthemum 
erystallinum, Linn. 
I’cones, pl. (icon, elkav, a figure), 
pictorial representations of plants, 
botanic figures. 
icosahed’ral (efxoo., twenty, édpa, a 
seat or base), having twenty sides, 
as the pollen-grains of Tragopogon 3 
icosan’der, icosan’drous, -rus (av7p, 
dvdpds, @ man), with twenty or 
more stamens; Icosan’dria, a Lin- 
nean class of plants with twenty 
stamens or more inserted on the 
calyx. ee 
icter’icus, icteri‘nus (/«repixos, jaun- 
diced), the colour of a person 
suffering from jaundice, impure 
yellow. : . ; 
Id (ldys, suffix implying paternity), 
131 
an hereditary unit recognised in 
granules and chromosomes ; I’dant, 
a serial complex of ids, Weismann’s 
term for CHRoMosoME. 
Identifica’tion, used for Determination 
(Crozier). 
-i’des, -ideus (eldos, like), a suffix in 
Greek compounds denoting similar, 
cf. -0-IDES. 
Id‘ioblast (t5.0s, personal, peculiar, 
Bdaords, a bud or shoot), (1) a 
special cell in a tissue which 
markedly differs from the rest in 
form, size, or contents, as the 
“‘stellate-cells” in Nymphaea ; 
(2) used by Hertwig for Pancrn, 
a unit of hereditary substance ; 
idiog’ynus + (yvv7) a woman), not 
having a pistil ; Id’ioplasm (rAdoya, 
moulded), Naegeli’s term for the 
active organic part of the proto- 
plasm ; idiothal’amous, zdiothal’a- 
mus, (Aédapos, 4 bedroom), having 
different colouration from the 
thallus, a term in lichenology ; 
Idiomorph’osis (udép@wos, a shap- 
ing), a special kind of metamor- 
phosis, as the petals of Camellia, 
from bundles of stamens, or peta- 
loid sepals of Polygala (Delpino). 
ig’neus (Lat., fiery), flame-coloured, 
used for combinations of red and 
yellow, or brilliant in tone. 
ignia’rius (Lat., pertaining to fire), 
of the consistence of German tin- 
der, derived from puff-balls. 
illegit’‘imate, fertilization in dimor- 
phicor trimorphic flowers sotermed, 
when occurring between parts of 
diverse length, as long with short, 
ete. 
imberb‘is (Lat.), beardless, devoid of 
hairs. 
Imbibit'ion (imbibo, I drink in), the 
act of imbibing ; ~ The’ory, Sachs’s 
suggestion that water ascends in 
plants by a chemical process in the 
cell-walls, and not by actual pas- 
sage upwards by vessels, 
im'bricate, imbrica’ted, imbrica’tus 
(Lat., covered with gutter tiles), 
(1) overlapping as the tiles on a 
roof; (2) in aestivation, used of a 
