octandrous 
oligodynamie 
with eight stamens; octan’drous, 
having eight stamens. 
Oc'tant (octans, a half-quadrant), the 
division of an oospore; ~ Wall, 
applied to the septum which cuts 
the oospore into octants, 
octan’therous (éxre, eight, dv@npos, 
flowery), having eight fertile sta- 
mens; octari’nus (dppyv, a male), 
Necker’s term for ocTanDROUS. 
octofa’rius (L, Lat.), in eight ranks or 
rows. ‘ 
octog’ ynous = OCTAGYNOUS. 
octoloc’ular (octo, eight, loculus, a little 
lace), applied to an eight-celled 
ruit or pericarp; octopet’alous, 
-lus (réradov, a flower-leaf), with 
eight petals; octora’diate (radius, 
a ray), with eight rays, as some 
Compositae ; octosep’alous (+ S#PA- 
Lum), with eight sepals; octo- 
sper’mous (omépua, seed), eight- 
seeded ; Oc’tospore (copa, seed)= 
the CarposPpore of Porphyraceae ; 
octosp’orous, eight spored ; octo- 
ste’monous (c7juwv, a thread), with 
eight fertile stamens ; octos’tichous, 
-us (crixos, a series), in eight rows. 
oc'ulate (oculus, an eye)=OCELLATE ; 
Oc’ulus, (1) the first appearance of 
a bud, especially on a tuber ; (2), 
the depression on the summit of 
some fruits, as the apple. 
-odes (eldos, resemblance), a suffix for 
similar to ; as phyllodes, like a leaf. 
od’dly pin’nate, with a terminal leaf- 
let, imparipinnate. 
odora’tus (Lat.), fragrant, usually 
restricted to sweet smelling 0’dours, 
which, in flowers, are sometimes 
due to essential oils which can be 
distilled off; at other times the 
scent cannot be collected by chemi- 
cal means. 
Oede’ma (ofSnua, a swelling), ¢ the 
tumid glands on woody tissues of 
Conifers. 
Oecol’ogy (otkos, a house, Adyos, a 
discourse), the study of plant-life 
in relation to environment; adj. 
oecolog’ical ; Oecol’ogist, a student 
of the life of the plant in relation 
to its surroundings ; NorE.—these 
words are frequently spelled, Ecol’- 
ogy, ecolog’ical, Ecologist. 
offici’nal, officina’lis(Lat.,of the shops), 
used of medicinal or other plants 
procurable at shops. 
Offset, a lateral shoot used for propa- 
gating, as in the houseleek ; Off- 
shoot, an offset. 
often-bear’ing, producing more than 
once in the season, multiferous. 
-oides, -odes, -ides, -oideus, suffixes 
from eléos, resemblance; as petal- 
oideus, resembling a petal. 
Oid‘ium, pl. Oid’ia (dor, an egg, + léor, 
a diminutive), a term used to de- 
note concatenate conidia (Cooke) ; 
not to be confounded with the 
form - genus Oidium, Link, the 
conidial stage of Erysipheae. 
Oil, used for any fluid fat-bodies in 
plants, chiefly stearic, palmitic, or 
oleic acids; ~ Cells, gum-cells ; ~ 
Plas’tids, ELAIOPLASTS; ~ Tube, a 
synonym of Vitra in the fruit of 
Umbelliferae. 
oleag’inous, -us (oleagineus, pertaining 
to the olive), oily and succulent. 
o’leic (olewm, olive oil) Ac’id, a glycer- 
ide or fat occurring in plants ; 
O’lein or O'leine, one of the vege- 
table fats. 
ol’ens (Lat.), smelling, 
sweetly odorous. 
Oleores‘in (olewm, olive oil, + RESIN), 
the natural admixture of a resin 
and an essential oil, forming a 
vegetable balsam or turpentine. 
olera’ceous, olera’ceus (Lat., herb- 
like), (1) having the nature of a 
pot-herb, esculent; (2) } growing 
in cultivated places (De Candolle). 
Olib’'anum (Arab., ol or al, the, 
Lubin, milk), a bitter and aromatic 
m-resin from several species of 
Boswellia, the frankincense of com- 
merce. 
oligan’drous, -rus (dAlyos, few, dvhp, 
dvdpos, a man), with few stamens ; 
oligan’thous, -thus (dv@os, a flower), 
few-flowered ; oligodynam’ic (dvva- 
jus, power), Naegeli’s term for the 
poisonous condition of water con- 
taining minute traces of copper 
especially 
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