Families (As per APG III)

O

Ochnaceae - 12 (Gomphia barberi, Gomphia hookeri, Gomphia serrata, Ochna gamblei, Ochna integerrima, Ochna jabotapita, Ochna kirkii, Ochna lanceolata, Ochna obtusata, Ochna obtusata, Ochna pumila, Ochna squarrosa)

Olacaceae - 15 (Anacolosa densiflora, Anacolosa puberula var. andamanica, Erythropalum scandens, Olax acuminata, Olax imbricata, Olax imbricata var. nigrescens, Olax nana, Olax psittacorum, Olax scandens, Olax zeylanica, Schoepfia fragrans, Schoepfia jasminodora, Strombosia ceylanica, Strombosia leprosa, Ximenia americana)

Oleaceae - 82 (Chionanthus leprocarpus var. courtallensis, Chionanthus mala-elengi subsp. linocieroides, Chionanthus mala-elengi subsp. mala-elengi, Chionanthus paniculatus var. paniculatus, Chionanthus paniculatus var. roxburgii, Chionanthus ramiflorus, Chionanthus roxburghii, Chionanthus zeylanica, Chionanthus zeylanicus var. dichotomus, Fraxinus floribunda, Fraxinus micrantha, Fraxinus xanthoxyloides, Jasminum adenophyllum, Jasminum agastyamalayanum, Jasminum amplexicaule, Jasminum angustifolium, Jasminum angustifolium var. sessiliflorum, Jasminum arborescens, Jasminum attenuatum, Jasminum auriculatum, Jasminum azoricum, Jasminum bignoniaceum, Jasminum brevilobum, Jasminum calophyllum, Jasminum caudatum, Jasminum cordifolium, Jasminum cuspidatum, Jasminum dispermum, Jasminum flexile, Jasminum flexile var. ovatum, Jasminum grandiflorum, Jasminum humile, Jasminum lanceolaria, Jasminum laurifolium f. nitidum, Jasminum listeri, Jasminum malabaricum, Jasminum matthewii, Jasminum mesnyi, Jasminum molle, Jasminum multiflorum, Jasminum nepalense, Jasminum nervosum, Jasminum odoratissimum, Jasminum officinale, Jasminum polyanthum, Jasminum ritchiei, Jasminum rottlerianum, Jasminum roxburghianum, Jasminum sambac, Jasminum scandens, Jasminum subglandulosum, Jasminum trichotomum, Ligustrum compactum, Ligustrum confusum, Ligustrum decaisnei, Ligustrum decaisnei var. microphylla, Ligustrum gamblei, Ligustrum indicum, Ligustrum lucidum, Ligustrum myrsinites, Ligustrum nepalense, Ligustrum perrottetii, Ligustrum robustum, Ligustrum robustum subsp. walkeri, Linociera ligustrina, Linociera malabarica, Linociera parkinsonii, Linociera terniflora, Myxopyrum smilacifolium, Nyctanthes arbor-tristis, Olea cuspidata, Olea dentata, Olea dioica, Olea europaea, Olea europaea subsp cuspidata, Olea paniculata, Olea polygama, Osmanthus fragrans, Osmanthus insularis, Osmanthus suavis, Schrebera swietenioides, Syringa emodi)

Onagraceae - 55 (Circaea alpina, Circaea alpina subsp. imaicola, Circaea alpina subsp. micrantha, Circaea cordata, Circaea repens, Clarkia concinna, Clarkia elegans, Epilobium amurense, Epilobium angustifolium, Epilobium angustifolium subsp. circumvagum, Epilobium brevifolium, Epilobium brevifolium subsp. trichoneurum, Epilobium chitralense, Epilobium conspersum, Epilobium cylindricum, Epilobium gouldii, Epilobium hirsutum, Epilobium latifolium, Epilobium laxum, Epilobium leiophyllum, Epilobium minutiflorum, Epilobium palustre, Epilobium parviflorum, Epilobium royleanum, Epilobium sikkimense, Epilobium speciosum, Epilobium stracheyanum, Epilobium tibetanum, Epilobium wallichianum, Epilobium wattianum, Epilobium williamsii, Fuchsia arborescens, Fuchsia boliviana, Fuchsia magellanica, Fuchsia regia, Fuchsia speciosa, Ludwigia adscendens, Ludwigia erecta, Ludwigia hyssopifolia, Ludwigia octovalvis, Ludwigia octovalvis subsp. sessiliflora, Ludwigia peploides, Ludwigia perennis, Ludwigia peruviana, Ludwigia prostrata, Ludwigia sedioides, Oenothera biennis, Oenothera drummondii, Oenothera glazioviana, Oenothera laciniata, Oenothera nocturna, Oenothera odorata, Oenothera rosea, Oenothera stricta, Oenothera tetraptera)

Opiliaceae - 3 (Cansjera rheedei, Lepionurus sylvestris, Opilia amentacea)

Orchidaceae - 995 (Acampe carinata, Acampe ochracea, Acampe praemorsa, Acampe rigida, Acanthephippium bicolor, Acanthephippium sylhetense, Acanthophippium striatum, Acanthophippium sylhetense, Acriopsis javanica, Acrochaene punctata, Aenhenrya rotundifolia, Aerides crispum, Aerides dasypogon, Aerides falcata, Aerides maculosa, Aerides multiflora, Aerides odorata, Aerides ringens, Aerides rosea, Agrostophyllum brevipes, Agrostophyllum callosum, Agrostophyllum khasianum, Agrostophyllum myrianthum, Amitostigma puberula, Anoectochilus crispus, Anoectochilus elatus, Anoectochilus elwesii, Anoectochilus grandiflorus, Anoectochilus lanceolatus, Anoectochilus regalis, Anoectochilus roxburghii, Anoectochilus setaceus, Anoectochilus sikkimensis, Anthogonium gracile, Aorchis roborovskii, Aorchis spathulata, Aphyllorchis gollanii, Aphyllorchis montana, Aphyllorchis pantlingii, Aphyllorchis parviflora, Aphyllorchis prainii, Aphyllorchis tumkurensis, Apostasia odorata, Apostasia wallichii, Appendicula cornuta, Arachnis cathcartii, Arachnis flos-aeris, Arachnis labrosa, Archineottia microglottis, Arundina graminifolia, Ascocentrum ampullaceum, Ascocentrum himalaicum, Ascocentrum semiteretifolium, Biermannia arunachalensis, Biermannia bimaculata, Biermannia jainiana, Brachycorythis iantha, Brachycorythis obcordata, Brachycorythis splendida, Brachycorythis wightii, Bulbophyllum acutiflorum, Bulbophyllum affine, Bulbophyllum amplifolium, Bulbophyllum andersonii, Bulbophyllum aureoflavum, Bulbophyllum aureum, Bulbophyllum bisetum, Bulbophyllum bootanense, Bulbophyllum brienianum, Bulbophyllum capillipes, Bulbophyllum careyanum, Bulbophyllum cariniflorum, Bulbophyllum caudatum, Bulbophyllum cauliflorum, Bulbophyllum clarkeanum, Bulbophyllum cornu-cervi, Bulbophyllum crassipes, Bulbophyllum cupreum, Bulbophyllum cylindraceum, Bulbophyllum delitescens, Bulbophyllum depressum, Bulbophyllum ebulbum, Bulbophyllum elatum, Bulbophyllum elegans, Bulbophyllum elegantulum, Bulbophyllum emarginatum, Bulbophyllum eublepharum, Bulbophyllum fimbriatum, Bulbophyllum fischeri, Bulbophyllum fuscopurpureum, Bulbophyllum gamblei, Bulbophyllum griffithii, Bulbophyllum guttulatum, Bulbophyllum gymnopus, Bulbophyllum helenae, Bulbophyllum hirtum, Bulbophyllum hookeri, Bulbophyllum hymenanthum, Bulbophyllum kaitiense, Bulbophyllum keralense, Bulbophyllum khasianum, Bulbophyllum khasyanum, Bulbophyllum leopardinum, Bulbophyllum leptanthum, Bulbophyllum listeri, Bulbophyllum lobbii, Bulbophyllum macraei, Bulbophyllum maskeliyense, Bulbophyllum monanthum, Bulbophyllum mysorense, Bulbophyllum neilgherensis, Bulbophyllum odoratissimum, Bulbophyllum orezii, Bulbophyllum ornatissimum, Bulbophyllum panigrahianum, Bulbophyllum pantlingii, Bulbophyllum parvulum, Bulbophyllum penicillium, Bulbophyllum piluliferum, Bulbophyllum polyrrhizum, Bulbophyllum protractum, Bulbophyllum proudlockii, Bulbophyllum pulchrum, Bulbophyllum reptans, Bulbophyllum retusiusculum, Bulbophyllum rheedei, Bulbophyllum rigidum, Bulbophyllum rosemarianum, Bulbophyllum sarcophylloides, Bulbophyllum sarcophyllum, Bulbophyllum scabratum, Bulbophyllum secundum, Bulbophyllum sikkimense, Bulbophyllum silentvalliensis, Bulbophyllum spathulatum, Bulbophyllum striatum, Bulbophyllum thomsonii, Bulbophyllum tremulum, Bulbophyllum trichocephalum, Bulbophyllum triste, Bulbophyllum umbellatum, Bulbophyllum viridiflorum, Bulbophyllum wallichii, Bulbophyllum xylophyllum, Bulbophyllum yoksunense, Bulleyia yunnanensis, Calanthe alismifolia, Calanthe alpina, Calanthe angusta, Calanthe biloba, Calanthe brevicornu, Calanthe chloroleuca, Calanthe davidii, Calanthe densiflora, Calanthe griffithii, Calanthe herbacea, Calanthe lunifera, Calanthe mannii, Calanthe masuca, Calanthe pachystalix, Calanthe plantaginea, Calanthe puberula, Calanthe purpurea, Calanthe sylvatica, Calanthe tricarinata, Calanthe triplicata, Calanthe trulliformis, Calanthe uncata, Calanthe vestita, Calanthe whiteana, Cephalanthera damasonium, Cephalanthera longifolia, Cephalantheropsis gracilis, Cephalantheropsis longipes, Ceratostylis subulata, Chamaegastrodia shikokiana, Cheirostylis flabellata, Cheirostylis griffithii, Cheirostylis gunnarii, Cheirostylis moniliformis, Cheirostylis munnacampensis, Cheirostylis parvifolia, Cheirostylis pusilla, Cheirostylis seidenfadeniana, Cheirostylis sessanica, Cheirostylis tippica, Chiloschista fasciata, Chiloschista glandulosa, Chiloschista lunifera, Chiloschista parishii, Chiloschista usneoides, Chrysoglossum maculatum, Chrysoglossum ornatum, Cleisocentron trichromum, Cleisostoma appendiculatum, Cleisostoma aspersum, Cleisostoma discolor, Cleisostoma filiforme, Cleisostoma paniculatum, Cleisostoma racemiferum, Cleisostoma schneideri, Cleisostoma simondii, Cleisostoma striatum, Cleisostoma subulatum, Cleisostoma tenuifolium, Cleisostoma tricallosum, Cleisostoma williamsonii, Coeloglossum densum, Coelogyne barbata, Coelogyne breviscapa, Coelogyne corymbosa, Coelogyne cristata, Coelogyne fimbriata, Coelogyne flaccida, Coelogyne fuscescens, Coelogyne fuscescens var. brunnea, Coelogyne glandulosa var. bournei, Coelogyne griffithii, Coelogyne hajrae, Coelogyne holochila, Coelogyne longipes, Coelogyne micrantha, Coelogyne mossiae, Coelogyne nervosa, Coelogyne nitida, Coelogyne occultata, Coelogyne odoratissima, Coelogyne ovalis, Coelogyne pendula, Coelogyne prolifera, Coelogyne punctulata, Coelogyne radicosa, Coelogyne raizadae, Coelogyne rigida, Coelogyne schultesii, Coelogyne stricta, Coelogyne suaveolens, Coelogyne treutleri, Coelogyne uniflora, Coelogyne viscosa, Collabium assamicum, Collabium chinense, Conchidium braccatum, Conchidium filiforme, Conchidium microchilos, Conchidium muscicola, Conchidium nanum, Corallorhiza trifida, Corybas himalaicus, Corymborkis veratrifolia, Cottonia peduncularis, Cremastra appendiculata, Crepidium acuminatum, Cryptochilus luteus, Cryptochilus sanguineus, Cymbidium aloifolium, Cymbidium bicolor, Cymbidium bicolor subsp. obtusum, Cymbidium cochleare, Cymbidium cyperifolium, Cymbidium dayanum, Cymbidium devonianum, Cymbidium eburneum, Cymbidium elegans, Cymbidium ensifolium, Cymbidium ensifolium var. haematodes, Cymbidium erythraeum, Cymbidium gammieanum, Cymbidium hookerianum, Cymbidium iridioides, Cymbidium lancifolium, Cymbidium longifolium, Cymbidium lowianum, Cymbidium mackinnonii, Cymbidium macrorhizon, Cymbidium mastersii, Cymbidium parishii, Cymbidium sinense, Cymbidium tigrinum, Cymbidium whiteae, Cypripedium cordigerum, Cypripedium elegans, Cypripedium himalaicum, Cypripedium macranthos, Cypripedium pantlingii, Cypripedium tibeticum, Dactylorhiza hatagirea, Dendrobium acinaciforme, Dendrobium aduncum, Dendrobium aggregatum var. jenkinsii, Dendrobium amoenum, Dendrobium anamalayanum, Dendrobium anceps, Dendrobium aphyllum, Dendrobium aqueum, Dendrobium arunachalense, Dendrobium barbatulum, Dendrobium bicameratum, Dendrobium calceolaria, Dendrobium candidum, Dendrobium cathcartii, Dendrobium chrysanthum, Dendrobium chryseum, Dendrobium chrysotoxum, Dendrobium crumenatum, Dendrobium cumulatum, Dendrobium denneanum, Dendrobium densiflorum, Dendrobium denudans, Dendrobium devonianum, Dendrobium diodon subsp. kodayarensis, Dendrobium eriiflorum, Dendrobium falconeri var. senapatianum, Dendrobium farmeri, Dendrobium fimbriatum, Dendrobium fimbriatum var. oculata, Dendrobium formosum, Dendrobium gibsonii, Dendrobium haemoglossum, Dendrobium herbaceum, Dendrobium heterocarpum, Dendrobium heyneanum, Dendrobium hookerianum, Dendrobium khasianum, Dendrobium lawianum, Dendrobium lindleyi, Dendrobium lituiflorum, Dendrobium longicornu, Dendrobium mabelae, Dendrobium macrostachyum, Dendrobium mannii, Dendrobium microbulbon, Dendrobium monticola, Dendrobium moschatum, Dendrobium nanum, Dendrobium nareshbahadurii, Dendrobium nobile, Dendrobium nutans, Dendrobium ochreatum, Dendrobium ovatum, Dendrobium palpebrae, Dendrobium panduratum, Dendrobium panduratum var. villosum, Dendrobium parciflorum, Dendrobium parishii, Dendrobium peguanum, Dendrobium pendulum, Dendrobium porphyrochilum, Dendrobium praecinctum, Dendrobium primulinum, Dendrobium pulchellum, Dendrobium ramosum, Dendrobium regium, Dendrobium stuposum, Dendrobium sulcatum, Dendrobium terminale, Dendrobium thyrsiflorum, Dendrobium transparens, Dendrobium wardianum, Dendrobium wightii, Dendrobium williamsonii, Dendrobium × vexabile, Didiciea cunninghamii, Didymoplexis pallens, Didymoplexis seidenfadenii, Dienia ophrydis, Diglyphosa macrophylla, Diphylax griffithii, Diphylax urceolata, Diplocentrum congestum, Diplocentrum recurvum, Diplomeris hirsuta, Diplomeris pulchella, Diploprora championii, Diploprora truncata, Disperis neilgherrensis, Disperis zeylanica, Doritis taenialis, Dracula simia, Ephemerantha macraei, Epidendrum radicans, Epigeneium amplum, Epigeneium arunachalense, Epigeneium chapaense, Epigeneium fargesii, Epigeneium fuscescens, Epigeneium rotundatum, Epipactis gigantea, Epipactis helleborine, Epipactis veratrifolia, Epipogium aphyllum, Epipogium bracteata, Epipogium roseum, Eria acervata, Eria alba, Eria albiflora, Eria amica, Eria apertiflora, Eria arunachalensis, Eria bambusifolia, Eria biflora, Eria bipunctata, Eria bractescens, Eria carinata, Eria clausa, Eria clavicaulis, Eria connata, Eria corneri, Eria coronaria, Eria cristata, Eria dalzellii, Eria excavata, Eria exilis, Eria ferruginea, Eria globulifera, Eria graminifolia, Eria hegdei, Eria javanica, Eria jengingensis, Eria laniceps, Eria lohitensis, Eria meghasaniensis, Eria microchilos, Eria muscicola, Eria muscicola var. brevilinguis, Eria mysorensis, Eria nana, Eria occidentalis, Eria paniculata, Eria pannea, Eria pauciflora, Eria polystachya, Eria pseudoclavicaulis, Eria pubescens, Eria pudica, Eria pumila, Eria pusilla, Eria sharmae, Eria spicata, Eria stricta, Eria tiagii, Eria tomentosa, Eria vittata, Eriodes barbata, Erythrodes hirsuta, Erythrorchis ochobiensis, Esmeralda clarkei, Eulophia andamanensis, Eulophia bicallosa, Eulophia dabia, Eulophia densiflora, Eulophia emilianae, Eulophia epidendraea, Eulophia explanata, Eulophia flava, Eulophia geniculata, Eulophia graminea, Eulophia herbacea, Eulophia mackinnonii, Eulophia macrobulbon, Eulophia mannii, Eulophia nuda, Eulophia obtusa, Eulophia ochreata, Eulophia pratensis, Eulophia pulchra, Eulophia ramentacea, Eulophia spectabilis, Eulophia zollingeri, Flickingeria albopurpurea, Flickingeria bancana, Flickingeria fugax, Flickingeria hesperis, Flickingeria macraei, Flickingeria nodosa, Flickingeria ritaeana, Galeola altissima, Galeola cathcartii, Galeola falconeri, Galeola javanica, Galeola lindleyana, Galeola nudifolia, Gastrochilus acaulis, Gastrochilus acutifolius, Gastrochilus affinis, Gastrochilus arunachalensis, Gastrochilus calceolaris, Gastrochilus crassilabris, Gastrochilus distichus, Gastrochilus flabelliformis, Gastrochilus inconspicuus, Gastrochilus intermedius, Gastrochilus obliquus, Gastrochilus pseudodistichus, Gastrochilus pulchellus, Gastrochilus rutilans, Gastrochilus sessanicus, Gastrochilus suavis, Gastrodia arunachalensis, Gastrodia dyeriana, Gastrodia exilis, Gastrodia mishmensis, Gastrodia orobanchoides, Gastrodia silentvalleyana, Geodorum attenuatum, Geodorum densiflorum, Geodorum recurvum, Goodyera biflora, Goodyera foliosa, Goodyera fumata, Goodyera fusca, Goodyera grandis, Goodyera hemsleyana, Goodyera hispida, Goodyera procera, Goodyera recurva, Goodyera repens, Goodyera schlechtendaliana, Goodyera thailandica, Goodyera viridiflora, Goodyera vittata, Gymnadenia orchidis, Habenaria acuminata, Habenaria aitchisonii, Habenaria albomarginata, Habenaria arietina, Habenaria barnesii, Habenaria brachyphylla, Habenaria cephalotes, Habenaria commelinifolia, Habenaria crassifolia, Habenaria crinifera, Habenaria decipiens, Habenaria dentata var. dentata, Habenaria denticulata, Habenaria digitata, Habenaria diphylla, Habenaria edgeworthii, Habenaria elliptica, Habenaria elwesii, Habenaria ensifolia, Habenaria flabelliformis, Habenaria foliosa, Habenaria foliosa var. foetida, Habenaria furcifera, Habenaria gibsonii, Habenaria gibsonii var. foetida, Habenaria gibsonii var. foliosa, Habenaria grandifloriformis, Habenaria heyneana, Habenaria hollandiana, Habenaria intermedia, Habenaria latilabris, Habenaria longicorniculata, Habenaria longicornu, Habenaria longifolia, Habenaria macrostachya, Habenaria malintana, Habenaria malleifera, Habenaria marginata, Habenaria marginata var. fusifera, Habenaria marginata var. marginata, Habenaria multicaudata, Habenaria nematocaulon, Habenaria ovalifolia, Habenaria pallideviridis, Habenaria panchganiensis, Habenaria panigrahiana, Habenaria panigrahiana var. parviloba, Habenaria pectinata, Habenaria periyarensis, Habenaria perrottetiana, Habenaria plantaginea, Habenaria polyodon, Habenaria pubescens, Habenaria ramayyana, Habenaria rariflora, Habenaria reniformis, Habenaria rhynchocarpa, Habenaria richardiana, Habenaria roxburghii, Habenaria seshagiriana, Habenaria stenopetala, Habenaria suaveolens, Habenaria virens, Habenaria viridiflora, Hemipilia cordifolia, Herminium angustilabre, Herminium jaffreyanum, Herminium josephi, Herminium kumaunense, Herminium mackinnonii, Herminium monophyllum, Herminium monorchis, Herminium orbiculare, Herminium pugioniforme, Herminium quinquelobum, Herpysma longicaulis, Hetaeria ovalifolia, Hetaeria rubens, Ipsea malabarica, Kingidium decumbens, Kingidium mysorense, Kingidium niveum, Kraenzlinorchis malintana, Liparis atropurpurea, Liparis beddomei, Liparis biloba, Liparis bistriata, Liparis bootanensis, Liparis cespitosa, Liparis cordifolia, Liparis deflexa, Liparis delicatula, Liparis distans, Liparis downii, Liparis duthiei, Liparis elliptica, Liparis gamblei, Liparis glossula, Liparis luteola, Liparis mannii, Liparis nervosa, Liparis odorata, Liparis paradoxa, Liparis perpusilla, Liparis petiolata, Liparis plantaginea, Liparis platyphylla, Liparis platyrachis, Liparis prazeri, Liparis pygmaea, Liparis resupinata, Liparis rostrata, Liparis stricklandiana, Liparis udaii, Liparis vestita subsp. seidenfadenii, Liparis viridiflora, Liparis walakkadensis, Liparis walkeriae, Liparis wightiana, Liparis wrayi, Listera alternifolia, Listera brevicaulis, Listera dentata, Listera divaricata, Listera longicaulis, Listera micrantha, Listera nandadeviensis, Listera pinetorum, Listera tenuis, Ludisia discolor, Luisia abrahamii, Luisia balakrishnanii, Luisia birchea, Luisia brachystachys, Luisia evangelinae, Luisia filiformis, Luisia macrantha, Luisia primulina, Luisia psyche, Luisia tenuifolia, Luisia trichorhiza, Luisia trichorrhiza, Luisia tristis, Luisia volucris, Luisia zeylanica, Malaxis acuminata, Malaxis aphylla, Malaxis biaurita, Malaxis calophylla, Malaxis cylindrostachya, Malaxis densiflora, Malaxis josephiana, Malaxis khasiana, Malaxis latifolia, Malaxis mackinnonii, Malaxis maximowicziana, Malaxis muscifera, Malaxis purpurea, Malaxis rheedei, Malaxis saprophyta, Malaxis versicolor, Micropera mannii, Micropera obtusa, Micropera pallida, Micropera rostrata, Mischobulbum megalanthum, Monomeria barbata, Myrmechis pumila, Neogyna gardneriana, Neottia listeroides, Neottia mackinnonii, Neottianthe calcicola, Neottianthe secundiflora, Nephelaphyllum cordifolium, Nephelaphyllum sikkimensis, Nervilia aragoana, Nervilia crociformis, Nervilia discolor, Nervilia falcata, Nervilia gammieana, Nervilia gleadowii, Nervilia hispida, Nervilia hookeriana, Nervilia infundibulifolia, Nervilia juliana, Nervilia mackinnonii, Nervilia macroglossa, Nervilia plicata, Nervilia punctata, Oberonia acaulis, Oberonia agastyamalayana, Oberonia anamalayana, Oberonia arunachalensis, Oberonia balakrishnanii, Oberonia bellii, Oberonia bicornis, Oberonia brachyphylla, Oberonia brunoniana, Oberonia caulescens, Oberonia chandrasekharanii, Oberonia emarginata, Oberonia ensiformis, Oberonia falcata, Oberonia falconeri, Oberonia ferruginea, Oberonia forcipata, Oberonia gammiei, Oberonia griffithiana, Oberonia helferi, Oberonia jenkinsiana, Oberonia josephi, Oberonia lobulata, Oberonia longibracteata, Oberonia maxima, Oberonia mucronata, Oberonia myosurus, Oberonia obcordata, Oberonia orbicularis, Oberonia pachyrachis, Oberonia platycaulon, Oberonia prainiana, Oberonia proudlockii, Oberonia pumilio, Oberonia pyrulifera, Oberonia recurva, Oberonia rufilabris, Oberonia santapaui, Oberonia sebastiana, Oberonia seidenfadeniana, Oberonia sulcata, Oberonia swaminathanii, Oberonia tenuis, Oberonia thwaitesii, Oberonia verticillata, Oberonia wightiana, Oberonia wynadensis, Oberonia zeylanica, Oberonia nayarii, Odontochilus tortus, Oreorchis foliosa, Oreorchis indica, Oreorchis micrantha, Ornithochilus difformis, Otochilus albus, Otochilus fuscus, Otochilus lancilabius, Otochilus porrectus, Pachystoma hirsuta, Pachystoma pubescens, Pachystoma senile, Panisea demissa, Panisea tricallosa, Pantlingia paradoxa, Paphiopedilum druryi, Paphiopedilum fairrieanum, Paphiopedilum insigne, Paphiopedilum spicerianum, Paphiopedilum spicerianum f. burkhardii, Paphiopedilum venustum, Paphiopedilum wardii, Papilionanthe cylindrica, Papilionanthe uniflora, Papilionanthe vandarum, Pecteilis gigantea, Pecteilis rawatii, Pecteilis triflora, Pelatantheria insectifera, Pennilabium proboscideum, Pennilabium struthio, Peristeria elata, Peristylus affinis, Peristylus aristatus, Peristylus balakrishnanii, Peristylus brachypyhllus, Peristylus constrictus, Peristylus densus, Peristylus duthiei var. inayatii, Peristylus elisabethae, Peristylus fallax, Peristylus gardneri, Peristylus goodyeroides, Peristylus lancifolius, Peristylus lawii, Peristylus parishii, Peristylus plantagineus, Peristylus prainii, Peristylus pseudophrys, Peristylus richardianus, Peristylus sahanii, Peristylus secundus, Peristylus spiralis, Peristylus stocksii, Peristylus tentaculatus, Phaius flavus, Phaius luridus, Phaius mishmensis, Phaius tancarvilleae, Phalaenopsis decumbens, Phalaenopsis deliciosa, Phalaenopsis lobbii, Phalaenopsis mannii, Phalaenopsis mysorensis, Pholidota articulata, Pholidota chinensis, Pholidota convallariae var. breviscapa, Pholidota imbricata, Pholidota pallida, Pholidota protracta, Pholidota recurva, Pholidota undulata, Phreatia elegans, Platanthera arcuata, Platanthera bakeriana, Platanthera biermanniana, Platanthera clavigera, Platanthera dyeriana, Platanthera edgeworthii, Platanthera exelliana, Platanthera juncea, Platanthera leptocaulon, Platanthera sikkimensis, Platanthera stenantha, Platanthera susannae, Pleione grandiflora, Pleione hookeriana, Pleione humilis, Pleione maculata, Pleione praecox, Podochilus cultratus, Podochilus falcatus, Podochilus khasianus, Podochilus malabaricus, Polystachya flavescens, Polystachya seidenfadeniana, Pomatocalpa armigerum, Pomatocalpa decipiens, Pomatocalpa spicatum, Pomatocalpa undulatum, Ponerorchis chusua, Ponerorchis renzii, Porpax elwesii, Porpax fibuliformis, Porpax jerdoniana, Porpax meirax, Porpax reticulata, Porpax seidenfadenii, Pteroceras indicum, Pteroceras leopardinum, Pteroceras monsooniae, Pteroceras suaveolens, Renanthera imschootiana, Rhomboda arunachalensis, Rhynchostylis retusa, Rhytionanthos nodosum, Risleya atropurpurea, Ritaia himalaica, Robiquetia gracilis, Robiquetia josephiana, Robiquetia spathulata, Robiquetia succisa, Robiquetia virescens, Saccolabiopsis pusilla, Saccolabium congestum, Saccolabium curvifolium, Saccolabium roseum, Sarcanthus pauciflorus, Sarcoglyphis arunachalensis, Satyrium ciliatum, Satyrium nepalense, Schoenorchis gemmata, Schoenorchis jerdoniana, Schoenorchis latifolia, Schoenorchis manilaliana, Schoenorchis nivea, Seidenfadeniella filiformis, Seidenfadeniella rosea, Seidenfia crenulata, Seidenfia intermedia, Seidenfia malabarica, Sirhookera lanceolata, Sirhookera latifolia, Smithsonia maculata, Smithsonia straminea, Smithsonia viridiflora, Smitinandia micrantha, Spathoglottis ixioides, Spathoglottis plicata, Spathoglottis pubescens, Spiranthes lancea, Spiranthes sinensis, Staurochilus ramosus, Stereochilus hirtus, Stereosandra javanica, Sunipia andersonii, Sunipia bicolor, Sunipia intermedia, Sunipia paleacea, Sunipia scariosa, Taeniophyllum alwisii, Taeniophyllum arunachalense, Taeniophyllum campanulatum, Taeniophyllum crepidiforme, Taeniophyllum retrospiculatum, Taeniophyllum scaberulum, Taeniophyllum stella, Tainia bicornis, Tainia cordata, Tainia hookeriana, Tainia latifolia, Tainia minor, Tainia wrayana, Thelasis khasiana, Thelasis longifolia, Thelasis pygmaea, Thrixspermum centipeda, Thrixspermum musciflorum, Thrixspermum pulchellum, Thrixspermum pygmaeum, Thrixspermum trichoglottis, Thrixspermum walkeri, Thunia alba, Thunia venosa, Tipularia josephi, Trias bonaccordensis, Trias disciflora, Trias nasuta, Trias stocksii, Trichoglottis tenera, Trichotosia dasyphylla, Trichotosia pulvinata, Trichotosia velutina, Tropidia angulosa, Tropidia curculigoides, Tropidia pedunculata, Tylostylis discolor, Uncifera acuminata, Uncifera lancifolia, Uncifera obtusifolia, Vanda alpina, Vanda coerulea, Vanda coerulea f. luwangalba, Vanda cristata, Vanda motesiana, Vanda pumila, Vanda spathulata, Vanda teres, Vanda tessellata, Vanda testacea, Vanda thwaitesii, Vanda wightii, Vandopsis undulata, Vanilla planifolia, Vanilla sanjappae, Vanilla walkeriae, Vanilla wightiana, Xenikophyton seidenfadenianum, Xenikophyton smeeanum, Yoania prainii, Zeuxine affinis, Zeuxine chowdherii, Zeuxine chowdheryi, Zeuxine clandestina, Zeuxine flava, Zeuxine franchetiana, Zeuxine goodyeroides, Zeuxine gracilis, Zeuxine lindleyana, Zeuxine longilabris, Zeuxine nervosa, Zeuxine pulchra, Zeuxine reflexa, Zeuxine seidenfadenii, Zeuxine strateumatica)

Orobanchaceae - 91 (Aeginetia indica, Aeginetia indica var. alba, Aeginetia pedunculata, Alectra indica, Alectra parasitica var. chitrakutensis, Alectra sessiliflora, Boschniakia himalaica, Buchnera hispida, Campbellia cytinoides, Centranthera cochinchinensis var. nepalensis, Centranthera hispida, Centranthera indica, Centranthera nepalensis, Centranthera tranquebarica, Christisonia bicolor, Christisonia calcarata, Christisonia flammea, Christisonia indica, Christisonia keralensis, Christisonia lawii, Christisonia neilgherrica, Christisonia saulierei, Christisonia subacaulis, Christisonia tubulosa, Cistanche tubulosa, Gleadovia ruborum, Lathraea squamaria, Melasma arvense, Melasma thomsonii, Micrargeria wightii, Orobanche aegyptiaca, Orobanche alba, Orobanche cernua, Orobanche cernua var. desertorum, Orobanche cernua var. nepalensis, Pedicularis albida, Pedicularis bicornuta, Pedicularis bifida, Pedicularis brevifolia, Pedicularis canescens, Pedicularis cheilanthifolia, Pedicularis gracilis, Pedicularis heydei, Pedicularis hoffmeisteri, Pedicularis hookeriana, Pedicularis klotzschii, Pedicularis longiflora, Pedicularis longiflora subsp. tubiformis, Pedicularis megalantha, Pedicularis mollis, Pedicularis nodosa, Pedicularis oederi, Pedicularis oederi subsp. oederi var. heteroglossa, Pedicularis ophiocephala, Pedicularis pectinata, Pedicularis pectinata var. rosea, Pedicularis pennelliana, Pedicularis porrecta, Pedicularis punctata, Pedicularis rhinanthoides, Pedicularis rhinanthoides subsp. labellata, Pedicularis rhinanthoides subsp. revoluta, Pedicularis roylei, Pedicularis siphonantha, Pedicularis tenuirostris, Pedicularis trichoglossa, Pedicularis zeylanica, Penstemon gentianoides, Phtheirospermum glandulosum, Picrorhiza kurroa, Rhamphicarpa longiflora, Scrophularia calycina, Scrophularia decomposita, Scrophularia dentata, Scrophularia edgeworthii, Scrophularia elatior, Scrophularia himalensis, Scrophularia koelzii, Scrophularia obtusa, Scrophularia polyantha, Scrophularia variegata, Sopubia delphinifolia var. parviflora, Sopubia stricta, Sopubia trifida, Striga angustifolia, Striga asiatica, Striga densiflora, Striga euphrasioides, Striga gesnerioides, Striga indica, Striga masuria)

Oxalidaceae - 40 (Averrhoa bilimbi, Averrhoa carambola, Biophytum candolleanum, Biophytum congestiflorum, Biophytum helenae, Biophytum insigne, Biophytum intermedium, Biophytum longibracteatum, Biophytum longipedunculatum, Biophytum nervifolium, Biophytum nudum, Biophytum petersianum, Biophytum polyphyllum, Biophytum proliferum, Biophytum reinwardtii, Biophytum reinwardtii var. geniculata, Biophytum reinwardtii var. keralanum, Biophytum sensitivum, Biophytum umbraculum, Biophytum veldkampii, Oxalis acetosella, Oxalis cernua, Oxalis corniculata, Oxalis corniculata var. hispida, Oxalis corymbosa, Oxalis debilis, Oxalis debilis var. corymbosa, Oxalis dehradunensis, Oxalis deppei, Oxalis lasiandra, Oxalis latifolia, Oxalis pubescens, Oxalis richardiana, Oxalis rosea, Oxalis spiralis, Oxalis triangularis, Oxalis varadimalayana, Oxalis variabilis, Oxalis variabilis var. rubra, Oxalis violacea)