intercalated 
interstitia 
and the base; ~ veg’etative Zone, 
a portion lying between mature 
tissue which takes on growth as 
though a growing point ; inter’ca- 
lated, interposed, placed between. 
intercarp’ellary (inter, between, + 
CaRPEL), between the carpels; in- 
tercell’wlar, (+ CELLULAR) between 
the cells or tissues; ~ Pas’sage, a 
continuous opening between the 
cells; ~ Space, a cavity bounded 
by the cells of a tissue; ~ Sub’- 
stance, material extravasated from 
within to outside the cell; ~ Sys’tem, 
the intercellular spaces and adja- 
cent tissues (Crozier) ; intercos’tal 
(costa, a rib), between the ribs or 
nerves of a leaf; Intercros’sing, 
cross-fertilization ; interfascic’ular 
(fasciculus, a bundle), between the 
vascular bundles; ~ Cam’bium, 
that formed between the bundles 
in the primary medullary rays; 
~ conjune’tive Tis’sue = preceding ; 
~ Phio’ém, ~ Xy’lem, respectively 
formed from the ~ CAMBIUM ; inter- 
fi'lar (jfilum, a thread), between 
filaments, as the resting spore in 
Mesocarpus (Crozier); interfolia’- 
ceous (folium, a leaf + aceous) be- 
tween the leaves of a pair, as the 
stipules of many Rubiaceae ; inter- 
fo'liar, situated between two oppo- 
site leaves; Int/erfoyles, Grew’s 
name for (1) bracts; (2) scales ; (3) 
stipules. 
intergeri’num (Lat., placed between), 
Lig’num, + thedissepiment of a fruit. 
Interlob’ule (inter, between + lobule), 
name given by Spruce to a small 
plane process of a subulate or tri- 
angular form, between the lobule 
and the stem in certain Hepaticae. 
interme’ diate, interme’dius (Lat., that 
which is between), half-way, or 
between; ~ Tis’sue, the ground 
tissue in exogens, except that of 
the epidermis and vascular bundles; 
~ Type, employed by H. C. Watson 
for those plants whose distribu- 
tion in Great Britain is of a local 
or doubtful range ; ~ Zone (1) the 
active zone between the pith and 
136 
epidermis, containing the vascular 
bundles in Monocotyledons ; (2) by 
Watson used as indicating a certain 
elevation, between the agrarian and 
arctic zones ; intermicel’lar (+ M1- 
CELLA), between the micellae; inter- 
molec’ular (+ Mo.cuLe), between 
the molecules. 
inter’nal (interne, inwardly) ~ Peri- 
ey’cle, Flot’s expression for the 
procambium retained on the inner 
side of the vascular bundle. 
In’ternode, Interno’dium (Lat.), the 
space or portion of stem between 
two nodes ; adj. interno’dal. 
interpet/iolar, interpetiola’ris (inter, 
between, petiolus, a little stalk), 
(1) between the petioles; (2) en- 
closed by the expanded base of a 
petiole ; (3) also applied to connate 
stipules which have coalesced from 
two opposite leaves. 
interposed (interpos’itus, placed be- 
tween) Mem’bers, those parts 
which have arisen in a whorl sub- 
sequent to its earlier members ; 
Interposit’ion, Interposit'to, forma- 
tion of new parts between those 
already existing in a whorl ; inter- 
positi’vus (Lat.), interposed. 
interrup’ted (interruptus, broken or 
separated), when any symmetrical 
arrangement is destroyed by local 
causes ; a solution of continuity ; 
~ Growth, an alternation of abun- 
dant and scanty development, 
appearing as constrictions in an 
organ, as a fruit or tap-root; 
interrup’tedly pin’nate (1) a pinnate 
leaf without a terminal leaflet ; 
(2) having small leaflets interposed 
with those of larger size. 
interstam’inal (inter, between, + sTA- 
MINAL), placed between two sta- 
mens; interstam’inate is a synonym. 
Inter’stice (¢nterstit’ium, a space be- 
tween), small air-spaces; larger are 
termed lacunae, still larger, air- 
passages ; interstit‘ial Growth, the 
theory which requires the interpo- 
sition of new particles between the 
older portions, instead of superficial 
additions. 
