Nothogamia 
(SUPPLEMENT) 
omphaloid 
gamy, crossing of various varieties 
in contradistinction to Hypripo- 
GAaMY ; Nothogam’‘ia has been 
proposed by Clements for hybrid- 
ization generally. 
No’viform, a CuLTirorm of recent 
origin (Kuntze). 
nu'bilus (Lat., dusky), greyish blue 
(Hayne). 
nuclear Plate, the demarcation of 
the daughter-cells in nuclear-divi- 
sion. 
Nu‘clei: Blad’der ~, found in latex, 
which seem to increase by direct 
division (Molisch); Giant ~ of 
certain species of Aloé, remarkable 
for their size ; Thread ~, long drawn 
out, inthe mucilageof Amaryllideae 
(Molisch). 
Nucleochyle’ma (xvA0s, juice), Stras- 
burger’s term for the fluid which 
fills the spaces in the Linin; nu- 
cleola’ted, having nucleoles. 
Nu‘culane = NucuLaNium. 
nyctipelag’ic (wi, vuxros, night, + 
PELAGIC), floating organisms which 
rise to the surface only at night 
(Forel) ; nyctig’amous (vuxriyauos, 
marrying by night), flowers which 
close by day, but open at night, 
often scented. 
nymphaea’ceous, resembling or akin 
to the waterlilies, Nymphaeaceae. 
Ob’ices (pl. of obex, a barrier), Cle- 
ments’s term for hindrances to plant 
distribution; they may be bio- 
log’ical ~, as constitution of the 
plants, or physical ~, as the 
shutting in by mountains. 
ocean‘ic, applied to organisms living 
in the open sea; Ocea’nium, an 
ocean formation ; oceanoph’ilus 
(@iréw, I love), ocean - loving ; 
oceanophyt’icus, relating to ocean 
plants; Oceanophy’ta (gurdv, a 
plant), ocean plants (Clements). 
Och’thium (6x67, a bank), a bank 
formation ; ochthoph’ilus (¢:Aéw, I 
love), bank loving; Ochthophy’ta 
(@urdv, a plant), plants of banks or 
dikes (Clements). 
Ochet‘ium, or Ochet/ion (éyerds, a 
conduit), a plant succession occa- 
sioned by drains or ditches (Cle- 
men's). 
octinu'cleate (+ NucLxvs), having 
eight nuclei (Harper). 
odon'toid (d50vs, ddé6vr0s, a tooth, 
eldos, resemblance), tooth - like, 
dentate (Heinig). 
Oece’sis (olknots, dwelling), thorough 
establishment of a species (Cle- 
ments) ; originally spelled Ece’sis. 
Oecol’ogism, = OECOLOGY; Oe8co- 
genesis (+GENEsIS), the origin 
of oecologic factors; oecolog’ic 
Opt‘imum, when the  surround- 
ings offer the most favourable 
conditions for the life of a given 
plant; Oecol’ogy, physiograph’ic, 
the distribution of plants according 
to climate and soil; Oecopar’asite 
(+ PapasiTE), a specialized form 
of a parasitic fungus when growing 
on one or more host-species to which 
it is confined under normal cir- 
cumstances ; ¢f. XENOPARASITE ; 
Oecopar’asitism is the condition 
in question (Salmon); Oec’otone 
(rovos, stress), the stress line or 
boundaries between plant associa- 
tions (Clements) ; originally spelled 
Ecotone. 
Ocede’mata, pl. of Ozpz’Mma, (2) pro- 
posed in place of ‘‘ substitute Hy- 
dathodes.” 
oedogonia’ceous, pertaining to Oedo- 
gonium or its allies. 
oligarch (dpx}, origin), applied to a 
vascular cylinder containing but 
few bundles (Crozier) ; oligonitro- 
ph‘ilous, used of bacteria which 
occur in nutritive media wanting 
in nitrogenous compounds (Beyer- 
inck), 
Olisth’‘ium, or Olisth’ion (80s, 
slipperiness), a succession of plants 
on landslips (Clements). 
oliva’ceous, (2) olive-coloured. 
Om’brophyte (¢ur6v, a plant), a shade- 
loving plant (Hansgirg). 
Omphalo’dium, Kerner’s term for 
Hitum (1); om’phaloid (eldos, re- 
semblance), navel-like, umbilicate 
(Heinig). 
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