BOTANIC MATERIA MEDICA. 443 
Infusoria—plural, in’-fu-so’-ri-a (Lat. infusoria, 
from 7zfusus, soaked, poured into). Animal 
organisms or animalcules inhabitating stag- 
nant water, very minute, requiring a micro- 
scope of some power to see them, they are so- 
called from being found in the vegetable in- 
fusions. 
Ingraft or Engraft—To insert a branch or twig 
of one tree or bush into another, to improve 
and propagate the species. 
Inspissated—in’-spis-sa’-ted (Lat. i, into, 
and sfissatus, to make thick). The juice of 
certain plants thickened by evaporation. 
Intercellular—in’-ter-sel’-u-ler (Lat. inter, be- 
tween, and ce//u/a, a little store-house). That 
portion of the plant lying between the cells; 
cellular tissue. , 
Internode—in’-ter-nod (Lat. internodium, from 
enter, between, and nodus, a knot). The space 
between two knots or leaf buds on the stem 
of a plant. 
Intracellular—in’-tra-sel’-u-ler (Lat. intra, 
within, on the inside, and cellula, a little 
Storehouse). Within the cells, applied to the 
formation of a cell within a cell, 
Introrse—in-trors’ (Lat. introrsum, within). 
Turned inwards towards the axis; applied to 
the anthers when they turn towards the 
pistil. 
Involucre, also Involucrum—(Lat. zz, into, 
volvo, I roll). A collection of bracklets or im. 
mature leaves surrounding a flower head. _ 
Involute—in’-vo-lot (Lat. zuvolutum, to en- 
close, to wrap). Rolled spirally inwards, as 
leaves, 
