orbicular 



Orophytia 



cular), of a flat body with a cir- 

 cular outline ; orbic'ulate, orbicu- 

 la'tus, disk-shaped; Orbic'ulus, (1) 

 the fleshy corona in the genus 

 Stapelia; (2) a round flat hymen- 

 ium in Fungi. 



Orbil'la {orbis, an orb), the shield of 

 certain Lichens, as in Usnea. 



Oroberia, a general term for Lichens 

 which yield dyes, as Lecanora, 

 Eoecella, etc. 



orcbida'oeous, -eus, (1) furnished with 

 two' tubers at the roots, as species 

 of the genus Orchis and its allies ; 

 (2) pertaining to the order Or- 

 chideae ; orchid'ean, orcbid'eous, 

 relating to the Orchideae ; Orohi- 

 dol'ogy {\6yos, discourse), the study 

 of Orchids. 



Or'chil, also known as Cudbear, and 

 Litmus, a valuable dye from 

 Lecanora tartarea, Ach., and other 

 Lichens. 



Or'oin, the colouring principle from 

 various tinctorial Lichens. 



orculaeformls [orcula, a small tun ; 

 forma, shape), used by Koerber for 

 cask-shaped Lichen -spores. 



Or'der, Or' do (Lat., methodical ar- 

 rangement), in botany, a group 

 between genus (tribe, suborder) 

 and class; or'dinal, relating to an 

 order, as -*' Char'acter, that which 

 marks it off" from kindred orders. 



Or'ead {opfi^s, a mountain nymph), a 

 sun-plant or heliophyte. 



Orgadi^um {opyhs, a meadow), an open 

 woodland formation ; orgadoc'ola 

 {colo, I inhabit) ; and orgadoph'ilus 

 {<pi\4w, I love), dwelling in open 

 woodland ; Orgadopby'ta {<l>vrhv, 

 a plant), open woodland plants 

 (Clements). 



Or'ffan {opyavov, an instmment), any 

 definite part of a structure, as a 

 cell, a fibre, a leaf, etc. ; Or'gans of 

 Beproduo'tion, those which are con- 

 cerned in the production of seeds 

 or spores; in Phanerogams the 

 stamens and pistils are so termed ; 

 '*' of Vegeta'tion, those connected 

 with the growth simply, as roots 

 and leaves ; organ'ic, organ'icus, 



relating to living organs ; --' Cen'tre, 

 the point or axis around which 

 growth takes place, it may not be 

 the structural centre ; Or'ganism, a 

 body possessing organic structure ; 

 Organog'eny (ycvos, race, ofl'spring), 

 or Organogen'esis {y4vt<n5, begin- 

 ning), the formation and develop- 

 ment of organs from their primitive 

 condition; adj. organogenetlc ; 

 Organog'raphy ['ypi<pu}y I write); 

 Organol'ogy {K6yos, discoui-se), the 

 study of organs and their relations ; 

 Org'anoid (e/Sos, like), an organ of ap- 

 parently unknown functi^n( Swingle); 

 organoplas'tic (ir\a<rTt/ci)s, suitable 

 for being wrought), with the power 

 of producing organs ; Or^^anopbysi- 

 orogy, the requisite modification in 

 structure to enable a species to settle 

 in a given place (Drude). 



Orgy'a (op7ujo, a fathom), six feet in 

 height; orgyalis, a fathom long, 

 the height of a man. 



Orienta'tion {oriens, the east), (1) the 

 correct placing with regard to the 

 quarters of the compass; (2) gene- 

 rally means relative position, as 

 applied to organs, etc; in'verse -^f 

 applied to the inversion of the 

 ovuliferous scale bundles in Coni- 

 fer ae. 



Or'ifice, Orific'ium (Lat., an opening), 

 an opening by which spores, etc., 

 escape ; ostiole. 



Or'igin, employed by Hartog to ex- 

 press the German "Anlage"i cf. 

 Fundament, Incept, Inception, 

 Primordium, etc. 



Orig'oma = Ortgoma. 



omithog'amoas {opvis, opyiBos, a bird ; 

 yifjLos, marriage), fertilization effected 

 by birds ; Omitbopb'ilae {<I>iK4w, 1 

 love), plants habitually fertilized 

 by pollen brought by birds ; adj. 

 omitbopb'ilous. 



Or'mogon, cited by Grozier, = Hor- 

 mogone. 



oropb'ilus {6pos, a mountain ; ^tXcw, 

 I love), dwelling in sub-alpine 

 regions ; Oropby'ta {<pvrhy, a plant), 

 sub-alpine plants; Oropbyti'a, sub- 

 alpine plant formatio ns (Clements) 



269 



