mesophytic 
Moetaphery 
Metar’abin 
CoLLaR or junction of stem and 
root ; (2) by Lindley given as the 
demarcation between the internode 
and petiole; mesophyt'ic, relating 
to plants which require an average 
amount of moisture only ; Mesopo- 
d‘ium (rods, odds, a foot), the inter- 
mediate part of a leaf, the petiole 
or leaf-stalk ; Mes’osperm (c7répyua, 
seed), the second membrane or 
middle coat of aseed, thesarcoderm; 
Mes’ospore (c7opa, seed) ; Dietel’s 
term for an Uredo-spore which ap- 
parently will only germinate after 
a resting period; mesosty’lous 
(+Sry.vs), in trimorphic plants 
those which possess flowers hav- 
ing styles of intermediate length ; 
Mesothe'cium (@7«7, a case), (1) the 
intermediate layer of cells in the 
wall of the anther ; in ripe anthers it 
often occurs as the inner layer by 
disappearance of the endothecium 
proper ; (2) the THEcrium of Lichens ; 
Mes’otherm (6¢pu7, heat), a plant of 
the sub-tropical or warm temperate 
zones, in Britain needing protec- 
tion against frost; mesotri’arch 
(+TRIARCH), when in a triarch stele 
the two principal xylem bundles 
are more or less fused (Prantl) ; 
mesoxyl'ic (EUAov, wood), asynonym 
of MESARCH. 
Mes’‘tom or Mes’tome (ec7ds, replete), 
Schwendener’s term for the ducts of 
a bundle, those parts which do 
not conduce to its strength; ¢/. 
STEREOME. 
(werd, with, beyond, 
sharing with, + Arabin), a sub- 
stance present in some varieties 
of gum arabic, possibly identical 
with the ‘‘ Pectose ” of sugar beet ; 
Metabio’sis (ios, life), symbiosis, 
with one of the organisms pre- 
paring the way for the other; not 
synchronous ; Met’ablast (8Ado7os, 
a bud), the NucELLvs. 
metabol'ic (wera Bor}, change), applied 
to chemical changes in living organ- 
isms; ~ Force, vital activity ; Meta- 
b’olism, the sum of the chemical 
changes in a living cell, usually 
157 
restricted to constructive change; 
cf. ANABOLISM, KaTABOLISM ; meta- 
’olize, to change as described. 
Metacel’lulose (uera, with, + CELLU- 
Los), found in Lichens and Fungi ; 
it is the same as FUNGINE ; Meta- 
chlamyd’eae (xAauis, a cloak), Mac- 
millan’s proposed term for Composi- 
tae ; adj. metachlamyd’eous ; Meta- 
collench’yma (+ CoLLENCHYMA), a 
result of secondary metamorphosis 
which has taken place at a late 
period (C. Mueller); Metacra’sis 
(kpaots, a mixture), kinetic meta- 
bolism, transmutation of energy ; 
metad’romous (dpéuos, a course), 
a form of venation in which in 
a single Fern-frond the first set of 
nerves in the segments are given 
off on the upper, or the lower (basal) 
side of the midrib (Prantl) ; meta- 
gam’etal (+ GaMETe) Rejuven- 
es’cence, a cell or mass of cells 
acting as a gamete or zygote 
(Hartog) ; Metagam’ophyte (yauos, 
marriage, ¢urov, a plant), Mac- 
millan’s proposed name for his 
highest group of Phanerogams, 
a synonym of ‘ Siphonogamia” ; 
Metagen’esis (yevéous, a beginning), 
M‘Nab’s term for true alterna- 
tion of generations ; Metakine’sis 
(kivnows, a moving), the separation 
of the threads in the metaphasis 
stage of nuclear division; Met’amer 
(uépos, a part), used by Sachs to 
denote a PuyToNn, or one of a 
number of similar parts of a series. 
Metamorph’osis (ueraudpdwors, trans- 
formation), in botany the change of 
one organ into another, as stamens 
into petals; syn. Metamor'phy ; 
adj. metamor’phosed, changed. 
Metane’ma (e7d, with, vjua,a thread), 
Macmillan’s name for the second 
stage in the germination of Mosses 
which succeeds the protonema ; 
adj.metane’mal; Metaph’asis (pdcrs, 
a phase), in nuciear division the 
separation of the daughter chromo- 
somes ; Metaph’ery (popéw, I carry), 
the displacement of organs, as when 
alternate become opposite, etc. ; 
