The species which are critically endangered or probably extinct.
| Acampe congesta | Orchidaceae | Herbs |
|---|---|---|
| Adenosma malabaricum | Scrophulariaceae | Herbs |
| Anaphalis barnesii | Compositae | Herbs |
| Arisaema attenuatum | Araceae | Herbs |
| Arisaema auriculata | Araceae | Herbs |
| Arisaema peltatum | Araceae | Herbs |
| Hydnocarepus macrocarpa | Flacourtiaceae | Trees |
| Atuna travancorica | Rosaceae | Trees |
| Bombax scopulorum | Bombacaceae | Trees |
| Buchanania barberi | Anacardiaceae | Trees |
| Buchanania lanceolata | Anacardiaceae | Trees |
| Bulbophyllum aureum | Orchidaceae | Herbs |
| Calamus travancoricus | Arecaceae | Shrubs |
| Ceropegia beddomei | Asclepiadaceae | Climbers |
| Cirrhopetalum avreum | Orchidaceae | Herbs |
| Clematis bourdillonni | Ranunculaceae | Climbers |
| Colubrinma travancorica | Rhamnaceae | Shrubs |
| Cyclea fissicalyx | Menispermaceae | Climbers |
| Cynometra beddomei | Fabaceae | Trees |
| Cynometra travancorica | Fabaceae | Trees |
| Dalbergia beddomei | Fabaceae | Lianas |
| Dialium travancoricum | Fabaceae | Trees |
| Didymocarpus macrostachya | Gesneriaceae | Herbs |
| Dysoxylum beddomei | Meliaceae | Trees |
| Dysoxylum ficiforme | Meliaceae | Trees |
| Eugenia argentea | Myrtaceae | Trees |
| Eugenia discifera | Myrtaceae | Trees |
| Garcinia imberti | Guttiferae | Trees |
| Haplothismia exannulata | Burmanniaceae | Herbs |
| Hedyotis beddomei | Rubiaceae | Herbs |
| Hedyotis bourdillonii | Rubiaceae | Herbs |
| Hedyotis wynaadensis | Rubiaceae | Herbs |
| Hyalisma janthina | Triuridaceae | Herbs |
| Hydrobryum johnsonii | Podostemaceae | Herbs |
| Cinnamomum travancoricum | Lauraceae | Trees |
| Impatiens aliciae | Balsaminaceae | Herbs |
| Impatiens anaimudica | Balsaminaceae | Herbs |
| Impatiens cochinica | Balsaminaceae | Herbs |
| Impatiens coelotropis | Balsaminaceae | Herbs |
| Impatiens concinna | Balsaminaceae | Herbs |
| Impatiens johnii | Balsaminaceae | Herbs |
| Impatiens leptura | Balsaminaceae | Herbs |
| Impatiens macrocarpa | Balsaminaceae | Herbs |
| Impatiens munnarensis | Balsaminaceae | Herbs |
| Impatiens pandata | Balsaminaceae | Herbs |
| Impatiens platyadena | Balsaminaceae | Herbs |
| Impatiens pallidiflora | Balsaminaceae | Herbs |
| Impatiens rivulicola | Balsaminaceae | Herbs |
| Impatiens verecunda | Balsaminaceae | Herbs |
| Inga cynometroides | Fabaceae | Tree |
| Ipsea malabarica | Orchidaceae | Herbs |
| Isachne fischeri | Gramineae | Herbs |
| Isachne setosa | Gramineae | Herbs |
| Ixora johnsonii | Rubiaceae | Herbs |
| Jambosa bourdillonii | Myrtaceae | Trees |
| Janakia arayalpathra | Periplocaceae | Herbs |
| Limnopoa meeboldii | Gramineae | Herbs |
| Litsea travancorica | Lauraceae | Trees |
| Loesnerinella bourdilonii | Celastraceae | Climber |
| Madhuca bourdillonii | Sapotaceae | Trees |
| Meteoromyrtus wynaadensis | Myrtaceae | Trees |
| Morinda reticulata | Rubiaceae | Climber |
| Nilgirianthus asper | Acanthaceae | Shrubs |
| Nilgirianthus barbatus | Acanthaceae | Shrubs |
| Nilgirianthus beddomei | Acanthaceae | Shrubs |
| Nilgirianthus ciliatus | Acanthaceae | Shrubs |
| Nilgirianthus decurrens | Acanthaceae | Herbs |
| Nilgirianthus foliosus | Acanthaceae | Herbs |
| Nilgirianthus lupulinus | Acanthaceae | Herbs |
| Nilgirianthus neilgherrensis | Acanthaceae | Herbs |
| Nilgirianthus perrottetianus | Acanthaceae | Herbs |
| Nilgirianthus punctatus | Acanthaceae | Herbs |
| Nilgirianthus urceolaris | Acanthaceae | Herbs |
| Ochlandra beddomei | Bambusaceae | Trees |
| Ochreinauclea missionis | Rubiaceae | Trees |
| Oianthus beddomei | Asclepiadaceae | Twiners |
| Ophiorrhiza barnesii | Rubiaceae | Herbs |
| Ophiorrhiza candata | Rubiaceae | Herbs |
| Ophiorrhiza incarnata | Rubiaceae | Herbs |
| Ophiorrhiza munnarensis | Rubiaceae | Herbs |
| Orophea uniflora | Annonaceae | Shrub |
| Otonephelium stipulaceum | Sapindaceae | Trees |
| Palaquium bourdillonii | Sapotaceae | Trees |
| Paphiopedilum druryi | Orchidaceae | Herbs |
| Phaenanthus malabaricus | Annonaceae | Trees |
| Phlebophyllum lawsonii | Acanthaceae | Shrubs |
| Plectronia pergracilis | Rubiaceae | Shrubs |
| Poeciloneuron indicum | Bonnetiaceae | Trees |
| Poeciloneuron pauciflorum | Bonnetiaceae | Trees |
| Pogostemon travancoricus | Labiatae | Herbs |
| Polyalthia rufescens | Annonaceae | Trees |
| Pterospermum reticulatum | Sterculiaceae | Trees |
| Sageraea grandiflora | Annonaceae | Trees |
| Schefflera bourdillonii | Araliaceae | Climbers |
| Silentvalleya nairii | Gramineae | Herbs |
| Smithia venkobarowii | Fabaceae | Shrubs |
| Sonerila nemakadensis | Melastomataceae | Herbs |
| Strobilanthes dupenii | Acanthaceae | Herbs |
| Syzygium bourdillonii | Myrtaceae | Trees |
| Syzygium palghatense | Myrtaceae | Trees |
| Syzygium travancorcum | Myrtaceae | Trees |
| Taeniophyllum scaberulum | Orchidaceae | Herbs |
| Tephrosia wynaadensis | Fabaceae | Herbs |
| Toxocarpus palghatensis | Asclepiadaceae | Herbs |
| Vanilla wightiana | Orchidaceae | Herbs |
| Vernonia anaimudica | Compositae | Herbs |
| Vernonia heynei | Compositae | Herbs |
| Vernonia multibracteata | Compositae | Herbs |