Oncospores 
(SUPPLEMENT) 
Oxyrietum 
Onc’ospores, -ae (8yxos, a hook, + 
Spore), plants having hooked seeds 
to aid in dispersion (Clements). 
O’ocyst (xvoris, a bag), Vuillemin’s 
term for an envelope of the egg 
which is due to the cells compos- 
ing that structure. 
Oogen’esis, (2) the differentiation of 
a large resting cell (oosphere) to 
fuse with a small motile cell 
(sperm) into a zygote (Hartog) ; 
oogo’nial Tube = NECK-OANAL. 
O’6n, proposed as an equivalent of 
Eee (P. F. Myles); Oonang”’ium, the 
embryo sac (Radlkofer) ; Oone’ion 
(Radlkofer) = ARCHEGONIUM ; 
O’onyle (t\y, raw material), the 
unfertilized female organ of any 
sort (Radlkofer) ; ooplasm’ic, relat- 
ing to the OoPpLasM ; O’oplast, Ker- 
ner’s term for OoSPHERE ; oosphe’- 
ric, relating to the OosPHERE. 
O’pen, (2) expanded, the opposite of 
DIFFUSE. 
Oper’cule, (2) the lid of the flower in 
Eucalyptus; (3) the OpERcuLUM 
of Mosses. 
ophryd’eous, resembling or allied to 
the genus Ophrys. 
Op‘ium (o7ds, sap), a parasitic plant 
formation; opoph’ilus (¢:Aéw), I 
love), sap-loving ; Opophy’ta (gurov, 
a plant), parasites (Clements). 
Opportu’nism (opportunus,  con- 
venient), the direction in meta- 
morphosis due to the factors potent 
at the moment (Ganong). 
orchid’ean, (= ORCHIDEOUS; Orchi- 
dol’ogy (Adyos, discourse), the study 
of Orchids. 
Orga’dium (dpyas, a meadow), an open 
woodland formation; orgadoc’ola 
(colo, I inhabit) ; and orgadoph’tlus 
(piréw, I love), dwelling in open 
woodland; Orgadophy’ta (gurov, 
a plant), open woodland plants 
(Clements). 
Origin, employed by Hartog to ex- 
press the German “‘Anlage”; cf. 
Fonpament, Incert, Inozprion, 
PRIMORDIUM, etc. 
ornithog’amous (yduos, marriage), 
fertilization effected by birds. 
oroph‘ilus (épos, a mountain, gidéw, 
I love), dwelling in subalpine 
regions ; Orophy’ta (¢v7ov, a plant), 
subalpine plants ; Orophy’tia, sub- 
alpine plant formations (Clements). 
orthoclad’ous, -dus (kAddos, a branch), 
straight branched (Russow); Or- 
then’chyma (éyxéw, I pour in), 
Williamson’s correction of Ortho- 
sen’chyma, Binney’s term for par- 
enchyma of vertically arranged 
cells ; adj. orthen’chymous ; ortho- 
mor’phous (op¢y, shape), radial 
and erect( Wiesner); orthosper’ mous 
(orépua, a seed), having seeds 
with endosperm grooved on the 
ventral side, as in Carum. 
Oscilla’tion, the movement peculiar 
to Trichobacteria and Cyanophy- 
ceae (Jones). 
oscillatoria’ceous, allied to the genus 
Oscillatoria. 
Osmotax’is (rdfis, arrangement), re- 
arrangement of moving organisms 
in response to the influence of 
fluids ; adj. osmotac’tic. 
Ostiole, (3) a pore or opening in the 
prickles of Victoria regia (Trécul). 
Ova‘rium, add, (2) = ARCHEGONIOM 
(H. Gibson). 
overlap’ping, suggested to denote 
right or left, as right edge ~, = 
sinistrorse (i.e. dextrorse seen in 
front) ; left edge ~, = dextrorse 
(i.e. sinistrorse viewed from the 
front). 
overlying, a suggested rendering of 
INcUBOUS (Potter), 
oxalida’ceous, referring to the genus 
Ozxalis, or its allies. 
oxygeoph'ilus (ofos, sour, 7%, earth, 
giréw, I love), dwelling in humus ; 
Oxygeophy’ta (guvrov, a plant), 
humus plants; Oxygeophy’tia, 
humus plant formations (Clements); 
OxyYium (dus, mud), a humus 
marsh formation; oxylyph’ilus 
(pidA€w, I love), humus loving ; Oxy- 
lyphy’ta (gvrov, a plant), humus 
plants (Clements). 
Oxyrie’tum, an association of Oxyria 
plants (Clements), 
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