Indusium 
Injection 
for any indusium-like covering in 
Ferns, 
Indu’sium (Lat., a woman’s under- 
garment), (1) an epidermal out- 
growth covering the sori in Ferns ; 
(2) a ring of colJecting hairs below 
the stigma; (3) the annulus of some 
Fungi (Lindley) ; indu’siate, indu- 
sia‘tus, possessing an indusium. 
Indu’viae (Lat., clothes), (1) persist- 
ent portions of the perianth, or 
leaves which wither, but do not 
fall off; (2) scale-leaves; indu’- 
viate, induvia‘lis, induvia’tus, 
clothed with withered remnants. 
inembryona’'tus (in, not, embryo, an 
embryo), having no embryo. 
inaequilat’eral, inaequilatera'lis (in, 
not, aequalis, equal, datus, lateris, a 
side), unequal-sided; inae’quivalve, 
inaequival’vular (valva, a door- 
leaf), used of the glumes of plants 
which show inaequality in their 
constituent valves. 
Inench’yma (in, in, éyyuua, an infu- 
sion), fibro-cellular tissue, the cells 
having the appearance of spiral 
vessels, as in Sphagnum. 
inerm’, iner’mous, iner’mis (Lat., un- 
armed), without spines or prickles. 
ineye’, to inoculate, or bud. 
infarc’tate (infarctus, stuffed into), 
turgid or solid. 
infec’tious, communicable by infec- 
tion, as diseases in plants, etc. ; 
caused by some organism from 
outside. 
in’fer-agar’ian Zone, H. C. Watson’s 
term for the lowest portion of the 
cultivated lands in Great Britain ; 
~ arc’tic Zone, a similar term for 
the lowest division of his arctic 
region in Britain. 
infe’rior (Lat., lower), (1) below some 
other organ, as an ~ Ca‘lyxis below 
the ovary, or an ~ O’vary seems to 
grow below the adnate calyx; (2) 
has been used for anterior, or turned 
away from the axis. 
infla'ted, infla’tus (Lat., puffed up), 
bladdery, swollen. 
inflec’ted (inflec’to, I bend), bent or 
flexed. 
In’ferals, a division of gamopetalous 
Dicotyledons, proposed for Rubi- 
aceae, Compositae, Companulaceae, 
etc. 
inflex’ed, inflex'us (Lat., bent), turned 
abruptly or bent inward, in- 
curved. 
Inflores’ence, Inflorescen’tia (infloresco, 
I begin to blossom), (1) the disposi- 
tion of the flowers on the floral 
axis ; (2) less correctly used for the 
Flower Cluster ; def‘inite ~, when 
each axis in turn is terminated with 
a flower, as ina Cyme; indef'inite ~, 
when the floral axis is capable of 
continuous extension, as in a 
raceme. 
info’liate (in, in, foliwm, a leaf), to 
cover with leaves. 
infos’sus, (Lat., buried), sunk in any- 
thing, as the veins in some leaves, 
but leaving a visible channel. 
in'fra-axil'lary, infra-axilla’ris (infra, 
below + AXILLARIS), below the axil ; 
infrano’dal (nodus, a knot) Canals’, 
gaps in the medullary rays of Cal- 
amites, below the node, leaving 
prints on the casts (Williamson). 
infrac’ted, infrac’tus (Lat., broken, 
bent), incurved. 
Infructes’cence (fructus, fruit, by an- 
alogy to inflorescence), (1) the in- 
florescence in a fruiting stage; (2) 
collective fruits. 
infruc’tuose (infructuo'sus, unfruitful), 
barren, not bearing fruit. 
infundib’ular, infundibula’ris (infun- 
dibu'lum, a funnel), funnel-shaped ; 
infundibu'liform, infundibulifor’mis 
(forma, shape), shaped like a 
funnel. 
infus’cate (infuscus, dusky), of a 
brownish tint. 
Inhibition (inhibitio, a restraining), 
modification or restraint in func- 
tion. 
init‘lal (initialis, original) ~ Cells, 
cells from which primordial layers 
or nascent tissues arise; ~ Lay’er, 
the middle cambium layer. 
Injec’tion (injectus, cast into), the 
filling of intercellular spaces with 
water (Crozier). 
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