Families (As per The Plant List)

R

Ranunculaceae - 15 (Clematis gouriana, Clematis hedysarifolia, Clematis montana, Clematis munroiana, Clematis smilacifolia, Clematis triloba, Clematis wightiana, Consolida ambigua, Naravelia zeylanica, Ranunculus peninsularis, Ranunculus subpinnatus, Ranunculus wallichianus, Thalictrum dalzellii, Thalictrum javanicum, Thalictrum saniculaeforme)

Rhamnaceae - 20 (Colubrina asiatica, Gouania microcarpa, Rhamnus virgata, Rhamnus wightii, Sageretia parviflora, Scutia myrtina, Ventilago bombaiensis, Ventilago denticulata, Ventilago goughii, Ventilago madraspatana, Ziziphus abyssinica, Ziziphus glaberrima, Ziziphus glabrata, Ziziphus horrida, Ziziphus mauritiana, Ziziphus mauritiana var. fruticosa, Ziziphus nummularia, Ziziphus oenoplia, Ziziphus rugosa, Ziziphus xylopyrus)

Rhizophoraceae - 9 (Blepharistemma membranifolia, Bruguiera cylindrica, Bruguiera gymnorrhiza, Bruguiera parviflora, Carallia brachiata, Ceriops tagal, Kandelia candel, Rhizophora apiculata, Rhizophora mucronata)

Rosaceae - 17 (Eriobotrya japonica, Fragaria nilgerrensis, Prunus cerasoides, Prunus ceylanica, Pyrus communis, Rosa involucrata, Rosa leschenaultiana, Rosa multiflora, Rubus ellipticus, Rubus ellipticus var. hirta, Rubus fairholmianus, Rubus fockei, Rubus glomeratus, Rubus micropetalus, Rubus niveus, Rubus rosifolius, Rubus rugosus)

Rubiaceae - 175 (Adina cordifolia, Anotis monosperma, Anthocephalus chinensis, Argostemma courtallense, Argostemma verticillatum, Benkara malabarica, Borreria articularis, Borreria ocymoides, Borreria pusilla, Borreria stricta, Borreria verticillata, Canthium angustifolium, Canthium dicoccum var. dicoccum, Canthium dicoccum var. umbellatum, Canthium parviflorum, Canthium rheedei, Catunaregam rugulosa, Chasallia ophioxyloides, Chassalia curviflora var. ophioxyloides, Chassalia virgata, Coffea arabica, Coffea robusta, Coffea wightiana, Dentella repens, Fergusonia zeylanica, Galium asperifolium, Gardenia angusta, Gardenia gummifera, Gardenia latifolia, Gardenia resinifera, Gardenia turgida, Geophila repens, Hamelia patens, Hedyotis brachypoda, Hedyotis cyanantha, Hedyotis neesiana, Hedyotis trinervia, Hydrophylax maritima, Hymenodictyon obovatum, Hymenodictyon orixense, Ixora arborea, Ixora brachiata, Ixora chinensis, Ixora coccinea, Ixora coccinea var. lutea, Ixora cuneifolia, Ixora elongata, Ixora finlaysoniana, Ixora lanceolaria, Ixora lawsonii, Ixora leucantha var. malabarica, Ixora macrothyrsa, Ixora nigricans, Ixora notoniana, Ixora polyantha, Ixora williamsii, Knoxia sumatrensis, Knoxia wightiana, Kohautia aspera, Kohautia gracilis, Lasianthus acuminatus, Lasianthus capitulatus, Lasianthus coffeoides, Lasianthus jackianus, Lasianthus parvifolius, Lasianthus venulosus, Meyna laxiflora, Mitracarpus verticillatus, Mitragyna parvifolia, Morinda citrifolia, Morinda coreia, Morinda pubescens var. pubescens, Morinda tomentosa, Morinda umbellata, Mussaenda belilla, Mussaenda erythrophylla, Mussaenda glabrata, Mussaenda hirsutissima, Mussaenda laxa, Mussaenda phillipica, Mycetia acuminata, Neanotis calycina, Neanotis carnosa, Neanotis concanensis, Neanotis decipiens, Neanotis foetida, Neanotis indica var. indica, Neanotis latifolia, Neanotis montholonii, Neanotis quadrilocularis, Neanotis rheedei, Neanotis wightiana, Neolamarckia cadamba, Neonauclea purpurea, Neurocalyx calycinus, Ochreinauclea missionis, Oldenlandia affinis, Oldenlandia alata, Oldenlandia aspera, Oldenlandia auricularia, Oldenlandia caerulea, Oldenlandia corymbosa, Oldenlandia diffusa, Oldenlandia herbacea, Oldenlandia nagporensis, Oldenlandia nitida, Oldenlandia nudicaulis, Oldenlandia prainiana, Oldenlandia pumila, Oldenlandia pusilla, Oldenlandia shuteri, Oldenlandia stocksii, Oldenlandia umbellata, Oldenlandia wightii, Ophiorrhiza brunonis, Ophiorrhiza codyensis, Ophiorrhiza hirsutula, Ophiorrhiza mungos, Ophiorrhiza prostrata, Ophiorrhiza rugosa, Paederia foetida, Pavetta blanda, Pavetta breviflora, Pavetta cracicaulis, Pavetta hispidula, Pavetta indica, Pavetta indica var. glabrescens, Pavetta praecox, Pavetta siphonantha, Pavetta thomsonii, Pavetta thomsonii var. glaberrima, Pavetta tomentosa, Pentas lanceolata, Psilanthus travancorensis, Psychotria anamallayana, Psychotria bisulcata, Psychotria canarensis, Psychotria dalzellii, Psychotria elongata, Psychotria flavida, Psychotria nigra, Psychotria octosulcata, Psychotria subintegra, Psychotria truncata, Randia candolleana, Randia gardneri, Randia rugulosa, Richardia scabra, Rubia cordifolia, Rubia tinctoria, Saprosma ceylanicum, Saprosma glomerata, Spermacoce articularis, Spermacoce hispida, Spermacoce latifolia, Spermacoce malabarica, Spermacoce mauritiana, Spermacoce ocymoides, Spermacoce pusilla, Spermacoce remota, Spermacoce verticillata, Spermadictyon suaveolens, Tarenna agumbensis, Tarenna asiatica, Tarenna asiatica var. rigida, Tarenna canarica, Tarenna nilagirica, Thecagonum biflorum, Thecagonum ovatifolium, Tricalysia apiocarpa, Wendlandia angustifolia, Wendlandia exerta, Wendlandia thyrsoidea, Xeromphis spinosa, Xeromphis uliginosa)

Rutaceae - 37 (Acronychia pedunculata, Aegle marmelos, Atalantia monophylla, Atalantia racemosa, Atalantia wightii, Chloroxylon swietenia, Citrus aurantiifolia, Citrus × aurantium, Citrus grandis, Citrus limon, Citrus medica, Clausena anisata, Clausena dentata, Clausena indica, Euodia lunu-akenda, Glycosmis arborea, Glycosmis mauritiana, Glycosmis pentaphylla, Limonia acidissima, Limonia crenulata, Luvunga eleutherandra, Luvunga sarmentosa, Murraya koenigii, Murraya paniculata, Naringi crenulata, Pamburus missionis, Paramignya monophylla, Pleiospermium alatum, Ruta graveolens, Toddalia asiatica, Toddalia asiatica var. floribunda, Toddalia asiatica var. gracilis, Vepris bilocularis, Zanthoxylum budrunga, Zanthoxylum ovalifolium, Zanthoxylum rhetsa, Zanthoxylum tetraspermum)