| Species | Habit | Malayalam | English |
| Abelmoschus rugosus | Herb | | |
| Abroma augusta | Shrub to Small Tree | | Devil's cotton |
| Acalypha amentacea ssp. wilkesiana | Shrub | | Beefsteak Plant, Fire Dragon Acalypha |
| Acalypha hispida | Shrub | Poochavalan, Vattapoonthaliyari | Cat's tail, Chenille plant, Red-hot cat's tail, Foxtail, Red Hot Poker |
| Adansonia digitata | Tree | | Babob tree, African Baobab tree |
| Adenanthera pavonina | Tree | Manchadai, Maniadi, Manjati | Circassian tree, Coral wood, Red bead tree, Red wood |
| Adenium obesum | Shrub | Desert Rose | Desert Rose, Impala Lily |
| Adenocalymna alliaceum | Climber | Vellullichedi | Garlic plant |
| Agapanthus africanus | Herb | | African lily |
| Agave salmiana var. ferox | Shrub | | |
| Ageratum houstonianum | Herb | Kaliyamman-pathiri, Michangala, Neela appa, Floss Flower | Flossflower |
| Albizia saman | Tree | Mazhamaram, Urakamthoongimaram | Cow tamarind, Monkeypod, Rain tree |
| Alcea rosea | Herb | | |
| Allamanda blanchetii | Climber | | Cherry allamanda, Purple Allamanda |
| Allamanda cathartica | Climber | Manjakolambi, Kolaambi | Golden trumpet, Common allamanda |
| Alocasia macrorrhiza | Herb | Aanachembu, Aassamchembu, Chembu, Eezhachembu, Marenchembu, Pazhchembu | |
| Alstroemeria aurea | Herb | | Peruvian lily |
| Amherstia nobilis | Tree | Simshipa-vriksham | Pride of Burma, Orchid Tree |
| Ananas bracteatus | Herb | | Wild Pineapple |
| Angelonia salicariaefolia | Herb | Aamappoovu | |
| Antigonon leptopus | Climber | Thenpoovalli | Coral Creeper, Coral Vine, Corallita, Mexican Coral Vine, Mexican creeper, Pink Vine, Sandwich Island Creeper |
| Arachis glabrata | Herb | | Hagenbeck's Peanut |
| Arachis pintoi | Herb | | Forage Peanut |
| Araucaria heterophylla | Tree | | |
| Areca triandra | Tree | | |
| Aristea ecklonii | Herb | | Aristea |
| Aristolochia ringens | Climber | Garudapoovu, Mayilpoovu | Aristolochia, Gaping Dutchman's Pipe, Pipe vine |
| Artabotrys hexapetalus | Climber | Manoranjini, Madana-kameswari, Madana-poo | Climbing ylang-ylang, Bhandari vine, Tail grape, Hari Champa |
| Asclepias curassavica | Herb | Chemullichedi, Kammalchedi | Blood flower, Bastard ipecac, Curassavian swallow-wort, Silkweed |
| Asclepias physocarpa | Herb | | Balloon cottonbush, Balloon Plant |
| Asparagus setaceus | Climber | | |
| Asystasia gangetica ssp. micrantha | Herb | | |
| Barleria cristata | Shrub | Chulli, Kankambaram | Philippine violet, Crested philippine violet |
| Bauhinia acuminata | Shrub | Veluthamandaram, Mantharam | White Bauhinia, Kaa-long, Snowy Orchid |
| Bauhinia purpurea | Tree | Chuvannamandaram | Purple Bauhinia, Butterfly tree, Camel's foot tree, Geranium tree, Orchid tree |
| Bauhinia tomentosa | Shrub | Manjamanaram , Kanchanapoovu, Kanjenapoovu, Kanjanam, Kanchanamaram | St.Thomas tree, Yellow Orchid Tree, Yellow Bell Bauhinia |
| Bauhinia variegata | Tree | Chuvannamandaram, Malayakathi, Kovidaram, Mandaram, Kongu | Variegated bauhinia, Mountain ebony, Orchid tree, Purple orchid tree |
| Berrya cordifolia | Tree | | Trincomalee wood tree |
| Berrya javanica | Tree | | |
| Bidens sulphurea | Herb | | Sulphur Cosmos |
| Billbergia pyramidalis | Herb | | Foolproof Plant, Flaming Torch, Summer Torch |
| Bixa orellana | Shrub to Small Tree | Monkey-mailanchi, Kunkumam, Kurangumanjal, Sindooram | Annatto, Lipstick tree |
| Bougainvillea glabra | Shrub | Boganvilla, Kadalasupoovu-chedi | Bougainvillea |
| Bougainvillea spectabilis | Shrub | Boganvilla, Kadalasupoovu-chedi | Bougainvillea, Paper flower |
| Breynia disticha | Shrub | | Foliage flower, Snowbush |
| Browallia americana | Herb | | Jamaican Forget-Me-Not |
| Brownea grandiceps | Tree | | Rose of the Jungle |
| Brugmansia arborea | Shrub | | |
| Brugmansia suaveolens | Shrub to Small Tree | | Angle's Trumpet |
| Brunfelsia americana | Shrub | | Lady-of-the-night, Today & Tomorrow Plant |
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