parasitised 
Partition 
parasiti’sed, infected by a parasite ; 
Par’asitism, the state of preying 
upon another organism; Paras- 
perma’tia (+ SPERMATIA), small 
reproductive bodies resembling 
spores, found in some Algals 
(Lindley). 
Paras’tades (rapagrds, a door-post), 
the coronal rays of Passiflora, of. 
PaRAPETALA. 
Parasta’men ( + STamEN) or Paraste’- 
mon (cr7juwr, a filament), an abor- 
tive stamen, a staminodium. 
Parast‘ichy, Parastich’ies (rapa, from 
beside, o7lyos, a series), a secondary 
spiral in phyllotaxis ; Par’astyle (+ 
StTYLzE), an abortive style; Para- 
symbio’sis (+ SymsBiosis), when 
the hyphae of a parasite envelope 
the algal constituents of a Lichen 
and inflict injury (Zopf); parather- 
motrop‘ic (@epuos, warm, Tporh, a 
turning), proposed by Macfarlane 
for paraheliotropic, is such cases as 
the movements of leaves in Drosera, 
Oxalis and Mimosa; paraton’ic 
(révos, tension), effect of light in 
retarding growth; paratransver’- 
san (transversus, lying across), used 
of the planes parallel to the trans- 
versan plane of a Diatom frus- 
tule (O. Mueller); paraval’var 
(+ VaLveE), applied to those planes 
which are parallel to the valvar 
plane of a Diatom, cither epithecal 
or hypothecal (O. Mueller). 
Parench’yma (mrapeyxéw, I pour in 
beside), used by Grew, and since 
his time for the tissue composed of 
cells more or less isodiametric, 
especially such tissue as the 
pith and mesophyll; parenchy’- 
matous, consisting of parenchyma, 
spongy, porous, 
Parich’nos (rapa, beside, txvos, a foot- 
print), the two lateral prints on 
the leaf-scar of Lepidodendreae, 
Par‘ies (Lat., a house wall), pl., 
Par‘ietes, the wall of any organ; 
parietal, parieta‘lis, borne on or 
belonging to a wall; ~ U’tricle, used 
by Noll for the layer of proto- 
plasm next the cell-wall; Pari’etin, 
the colouring matter found in the 
Lichen, Physcia parietina, De Not. 
paripin’nate, paripinna’tus (Lat.), 
pinnate, with an equal number of 
leaflets, that is, without a ter- 
minal one. 
paroe’cious (mapa, from beside, olxos, 
a house), in Mosses, having the 
male and female organs in the 
same inflorescence, the male naked 
in the axils of the lower bracts ; 
paroi’cous is a synonym; Paror- 
thot’ropism (ép@0s, right, rporh, a 
turning), Archangeli’s term when 
leaves place themselves with the 
lamina vertical, but not necessarily 
meridional. 
parted, part/ite, arti’tus (Lat.), 
cleft, but not quite to the base. 
Parthenogam’ete (rap0évos, virgin + 
GaMETE), a gamete which develops 
without pairing (Hartog) ; Partho- 
genesis (yévecis, origin), a form of 
apogamy in which the oosphere de- 
velops into the normal product of 
fertilisation without a preceding 
sexual act; Parthenog’eny (yévos, 
race, offspring), has the same mean- 
ing; Parthenogonid’ia (yovds, off- 
spring), reproductive cells in a 
colony of Volvox Globator, Linn., 
acting asexually; Par’thenosperm 
(orépya, a seed), a body resembling 
a zygospore, but not resulting from 
the coalescence of the contents of 
two sexually different cells; Par’- 
thenospore (c7opda, a seed), is the 
same thing. 
par'tial, partia’lis (Lat.), in botany 
usually means secondary, as ~ In- 
volu’cre, ~ Ped’uncle, ~ Pet‘iole, 
~ Um’ bel; it is opposed to “‘general.” 
par'tible, partib’ilis (Lat., divisible), 
ultimately separating, or easily 
separable. 
par'tim (Lat.), partly; other ex- 
pressions are ex parte, pro parte. 
Partit/ion (purtitio, a division into 
parts), (1) a wall or dissepiment ; 
(2) a separated part or segment ; 
(3) the deepest division into which 
a leaf can be cut without becoming 
compound (Lindley). 
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