Ormogon 



ovate 



fertilised by pollen brought by 

 birds ; adj. ornitliopli'ilous. 

 Or'mogon, cited by Crozier, = HOR- 



MOGONE. 



Or'thoblast (opdos, upright, P\O.(TTOS, a 

 bud), used by Cramer for confer- 

 void prothallia growing in an 

 ascending direction ; Orthophoto- 

 tax'y (<t>ws, (paras, light, rdfis, 

 order), the direct arrangement of 

 such organisms as Volvox and 

 Spirogyra assumed under the 

 stimulus of light (Oltmanns) ; or- 

 thophototrop'ic (-n-poTrri, a turning), 

 the direct influence of light shown in 

 Vaucheria, Phycomyces, and shoots 

 of flowering plants (Oltmanns). 



Orthoploc'eae (TrXo/c?), a twining), those 

 Cruciferae which have conduplicate 

 cotyledons ; orthoplo'ceous, -ceus, 

 when the incumbent cotyledons 

 are folded round the radicle ; Or- 

 thosper'meae ( cnr^pfj.a, a seed ), 

 plants whose seeds have albumen 

 flat on the inner face, neither in- 

 volute or convolute ; Or'thostichy, 

 pi. Or'thostichies (o-n'xos, a row), a 

 vertical row, as in phyllotaxis ; 

 orthos'tichous, straight ranked ; 

 orthos'tomous (o-ro/ia, a mouth), 

 with a straight opening ; ortho- 

 tac'tic (rciis, order), used by S. 

 Moore in the sense of normal, ap- 

 plied to an interval in the PHOT- 

 RUM ; ortnot'ropal, ortnot'ropous 

 (rpoTrT], a turning), used of an ovule 

 with a straight axis, the chalaza 

 being at the insertion and the ori- 

 fice or foramen at the opposite end, 

 farthest from the hilum ; ortho- 

 trop'ic, assumingavertical position. 



Oryg'oma (opvy/^a, a ditch or pit), 

 Necker's term for the cup of a 

 Marchantia containing gemmae. 



Os, Or'is (Lat. ), a mouth or orifice. 



oscilla'ting = VERSATILE ; oscilla'nus, 

 oscillator' ius (Lat. from oscillatio, 

 a swinging), has the same meaning. 



Os'culum (Lat. a little mouth) 

 OSTIOLE. 



OBmom'eter ( wcr/uoj, a thrusting, 

 perpov, a measure), an instrument 

 to measure OSMOSIS ; s ' m o s e, 



Osmo'sis, the diffusion of liquids 

 through membranes ; adj. osmo'tic. 



os'seous, os'seus (Lat. ), bony. 



Ossic'ulus, Ossic'ulum (Lat., a little 

 bone), the pyrene of a fruit, as a 

 medlar. 



os'sifled (os, ossis, a bone, facio, I 

 make), becoming hard as bone, as 

 the stones of drupes, such as the 

 peach and plum. 



Ostaripliy'tuni (6arapi.ov, a little bone, 

 (pvrov, a plant), a plant which pro- 

 duces a drupe or drupe-like fruit. 



Osteoscle'reids (omeov, a bone, 

 aK\r]p6s, hard), the "bone-shaped" 

 sclereids of Halcea. 



os'tiolate, ostiola'tus (ostiolum, a little 

 door), furnished with an opening or 

 mouth; Os'tiole, Os'tiolum, (1) the 

 opening of the conceptacle in some 

 Algae ; (2) the aperture through 

 which spores escape from the peri- 

 thecium. 



ostracodermat'inus (6arpa.Kov, a hard 

 shell, dfp/j,d,Tivos, leathern), resem- 

 bling the shells of mollusca, applied 

 to certain Lichens. 



-o'sus, a termination indicating aug- 

 mentation, as radio'sus, large- 

 rooted. 



out'er, exterior, abaxial ; ~ Glumes, 

 one or more glumes at the base of 

 a spikelet in grasses, enclosing one 

 or more flowers ; <~ Perid'ium = 

 PERIDIUM EXTERNUM. 



Out'growth, .(1) another name for 

 EMERGENCE ; (2) a tuberous excre- 

 scence on roots. 



Out'line, the continuous boundary- 

 line of an organ, as a leaf. 



o'val, ova'lis (ovum, an egg), broadly 

 elliptic. 



Ovarioph'ylly ("udpiov, ovulum," <pu\- 

 \oi>. a leaf), descending metamorpho- 

 sis of a carpel into a leaf (Morren). 



O'vary, Ova' rium (ovum, an egg), that 

 part of the pistil which contains 

 the ovules, the immature fruit, 

 formerly termed the GERMKN. 



o'vc-te, ova'tus (Lat., egg-shaped), (1) 

 shaped like a longitudinal section 

 of a hen's egg, the broader end 

 basal ; (2) used for ovoid. 



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