GENUS
  ABBREVIATION
COMPOSITION
Oberonia Obrnia Natural
Octomeria Octmr Natural
Oddyara Oddy Cnths x Kefst x Pes
Odontioda Oda Cda x Odm
Odontobrassia Odbrs Brs x Odm
Odontocidium Odcdm Odm x Onc
Odontoglossum Odm Natural
Odontonia Odtna Milt x Odm
Odontopilia Odpla Odm x Trpla
Odontorettia Odrta Comp x Odm
Oeceoclades Oecl Natural
Oeonia Oeonia* Natural
Oeoniella Oenla Natural
Oerstedella Orstdl Natural
Okaara Okr Asctm x Ren x Rhy x V
Oncandra Ora Gal x Onc
Oncidenia Oncna Mcdn x Onc
Oncidesa Oncsa Gom x Onc
Oncidettia Onctta Comp x Onc
Oncidiella Onclla Onc x Rdzlla
Oncidioda Oncda Cda x Onc
Oncidium Onc Natural
Oncidpilia Oncpa Onc x Trpla
Onoara Onra Asctm x Ren x V x Vdps
Ophrys Ophrys Natural
Opsisanda Opsis V x Vdps
Opsiscattleya Opsct C x Ctps
Opsistylis Opst Rhy x Vdps
Orchis Orchis Natural
Orchiserapias Orsps Orchis x Srps
Orleanesia Orlns Natural
Ornithidium Ornthd* Natural
Ornithocephalus Ornthc Natural
Ornithochilus Ornchl* Natural
Ornithocidium Orncm Onc x Orpha
Ornithophora Orpha Natural
Osmentara Osmt Bro x C x Lps
Osmoglossum Osmgls Natural
Otaara Otr B x Bro x C x L
Otocolax Otcx Clx x Otst
Otoglossum Otglss Natural
Otonisia Otnsa Agn x Otst
Otosepalum Otspm Otst x Zspm
Otostylis Otst Natural
Owensara Owsr Dor x Phal x Ren
P
Pabstia Pab Natural
Pageara Pga Asctm x Lsa x Rhy x V
Palermoara Pal Ada x Comp x Gom
Palmerara Plmra Btmna x Otst x Zspm
Panczakara Pzka B x Epi x L x Soph
Panisea Pnsa Natural
Pantapaara Pntp Ascgm x Ren x V
Paphinia Pna Natural
Paphiopedilum Paph Natural
Papilionanthe Pplnnt Natural
Papperitzia Pprtz* Natural
Parachilus Prcls Psarco x Sarco
Paradisanthus Pdsnth Natural
Paraphalaenopsis Prphln Natural
Parasarcochilus Psarco Natural
Parnataara Parn Aer x Arach x Phal
Paulara Plra Asctm x Dor x Phal x Ren x V
Paulsenara Plsra Aer x Arach x Trgl
Pecteilis Pctls Natural
Pehara Peh Aer x Arach x V x Vdps
Pelacentrum Plctm Asctm x Pthia
Pelachilus Pelcs Gchls x Pthia
Pelastylis Pelst Pthia x Rhy
Pelatantheria Pthia Natural
Pelatoritis Pltrs Dor x Pthia
Pelexia Plxia Natural
Pepeara Ppa Asc x Dor x Phal x Ren
Peristeranthus Perths Natural
Peristerchilus Prschs Perths x Sarco
Peristeria Prstra* Natural
Perreiraara Prra Aer x Rhy x V
Pescatobollea Psbol Bol x Pes
Pescatorea Pes Natural
Pescawarrea Psw Pes x Wra
Pescoranthes Psnth Cnths x Pes
Pettitara Pett Ada x Brs x Onc
Phaiocalanthe Phcal Cal x Phaius
Phaiocymbidium Phcym Cym x Phaius
Phaius Phaius Natural
Phalaenopsis Phal Natural
Phalaerianda Phda Aer x Phal x V
Phalandopsis Phdps Phal x Vdps
Phalanetia Phnta Neof x Phal
Phaliella Phlla King x Phal
Phillipsara Phill Cnths x Stenia x Z
Pholidota Phldt Natural
Phragmipaphium Phrphm Paph x Phrag
Phragmipedium Phrag Natural
Phreatia Phrtia Natural
Phymatidium Phytdm* Natural
Physosiphon Phssph Natural
Piperia Piperia Natural
Platanthera Plat Natural
Platyclinis Pltycl* Natural
Platyrrhiza Pltrhz Natural 
Platystele Pltstl Natural 
Plectochilus Plchs Plrhz x Sarco
Plectorrhiza Plrhz Natural
Plectrelgraecum Plgcm Angcm x Plmths
Plectrelminthus Plmths Natural
Plectrophora Plctrp Natural
Pleione Pln Natural 
Pleurothallis Pths Natural
Podangis Pdngs Natural
Pogonia Pgnia Natural
Polycycnis Pcn Natural
Polyrrhiza Plrz* Natural
Polystachya Pol Natural
Pomacentrum Pmctm Asctm x Pmcpa
Pomatisia Pmtsa Lsa x Pmcpa
Pomatocalpa Pmcpa Natural
Pomatochilus Pmtls Pmcpa x Sarco
Ponthieva Pnthv*
Pooleara Polra Asctm x Ascgm x Phal x Ren
Porroglossum Prgm Natural
Porrovallia Pvla Masd x Prgm
Porterara Prta Rhy x Sarco x V
Potinara Pot B x C x L x Soph
Prescottia Prsctt* Natural
Prolax Prx Clx x Prom
Promenaea Prom Natural
Promenanthes Prths Cnths x Prom
Propetalum Pptm Prom x Z
Pseudolaelia Psdla* Natural
Psychilis Psychl Natural
Psychopsis Psychp Natural
Psygmorchis Psgmrc Natural
Pteroceras Ptrcrs Natural
Pterostylis Ptst Natural