| S. No. | Binomial name | Vernacular name | Family | Habit |
| 1 | Abutilon indicum (L.) Sweet. | Thutti | Malvaceae | Shrub |
| 2 | Acacia chundra (Roxb. ex Rottl.) Willd. | Karangali | Mimosaceae | Tree |
| 3 | Acacia ferrunginea DC. | Velvelam | Mimosaceae | Tree |
| 4 | Acacia leucophloea (Roxb.) Willd. | Vellavelam | Mimosaceae | Tree |
| 5 | Acacia nilotica (L.) Willd. | Karuvelam | Mimosaceae | Tree |
| 6 | Acalypha alnifolia Klein ex Willd. | - | Euphorbiaceae | Shrub |
| 7 | Acalypha indica L. | Kuppaimeni | Euphorbiaceae | Herb |
| 8 | Achyrnthes aspera L. | Nayuruvi | Amaranthaceae | Herb |
| 9 | Aerva lanata (L.) Juss. | Sirupulai | Amaranthaceae | Shrub |
| 10 | Aerva persica (Burm. f.) Merr. | Perumpulai | Amaranthaceae | Shrub |
| 11 | Agaratum conyzoides L. | Appakoti | Asteraceae | Herb |
| 12 | Albizia amara (Roxb.) Boivin. | Unjal | Mimosaceae | Tree |
| 13 | Albizia falcateria (L.) Fosb. | - | Mimosaceae | Tree |
| 14 | Albiziao doratissima (L.f.) Benth. | - | Mimosaceae | Tree |
| 15 | Alternanthera sessilis (L.) R.Br. | Ponnanganni | Amaranthaceae | Herb |
| 16 | Alternanthera paronychoides A. St. Hil. | - | Amaranthaceae | Herb |
| 17 | Amaranthes tricolor L. | - | Amaranthaceae | Herb |
| 18 | Apluda mutica L. | Moongilpul | Poaceae | Grass |
| 19 | Aristida setacea Retz. | Thudappampullu | Poaceae | Grass |
| 20 | Azadirachta indica A .Juss. | Vembu | Meliaceae | Tree |
| 21 | Barleria acuminate Nees in Wall. | - | Acanthaceae | Shrub |
| 22 | Barleria buxifolia L. | - | Acanthaceae | Herb |
| 23 | Barleria cristata L. | Kattukanagambarm | Acanthaceae | Shrub |
| 24 | Barleria cuspsidata Heyne ex Nees | Chillimul | Acanthaceae | Shrub |
| 25 | Bauhinia tomentosa L. | Kanchini | Caesalpiniaceae | Shrub |
| 26 | Boerhavia cripsa Heyneex Hook. | - | Nyctaginaceae | Herb |
| 27 | Boerhavia diffusa L. | Mukurattai | Nyctaginaceae | Herb |
| 28 | Borassus flabellifer L. | Panai | Arecaceae | Tree |
| 29 | Brachiaria distachya (L.) Stapf. | Marungalpul | Poaceae | Grass |
| 30 | Calotropis gigantean (L.) R. Br. | Velleruku | Asclepiadaceae | Shrub |
| 31 | Calotropis procera (Ait.) R.Br. | Erukku | Asclepiadaceae | Shrub |
| 32 | Canthium parviflorum Lam. | Karaycheddi | Rubiaceae | Shrub |
| 33 | Cardiospermum helicacabum L. | Mudakkotan | Sapindaceae | Climber |
| 34 | Cassia auriculata L. | Avaram | Caesalpiniaceae | Shrub |
| 35 | Cassia siamea Lam. | Manjakonnai | Caesalpiniaceae | Tree |