| Apiaceae | Eryngium spp. | 3 | M | |
| Fabaceae | Erythrina crista-galli L. | 1 | M-OR-T | |
| Myrtaceae | Eugenia uruguayensis Cambess. | 1.3 | OR | |
| Asteraceae | Eupatorium tweedianum Hook. & Arn. | 1 | OR | |
| Euphorbiaceae | Euphorbia rochaensis (Croizat) Alonso Paz & Marchesi | 2 | P | |
| Euphorbiaceae | Euphorbia serpens Kunth | 1 | M | |
| Convolvulaceae | Evolvulus sericeus Sw. | 1.3 | OR | |
| Moraceae | Ficus cestrifolia Schott | 1 | P | OR |
| Moraceae | Ficus luschnathiana (Miq.) Miq. | 1.3 | F-M-OR | |
| Rubiaceae | Galium sp. | 3 | OR | |
| Asteraceae | Gamochaeta americana (Mill.) Wedd. | 3 | M | |
| Asteraceae | Gamochaeta simplicicaulis (Willd. ex Spreng.) Cabrera | 1 | M | |
| Asteraceae | Gamochaeta sp. | 4 | M-OR | |
| Verbenaceae | Glandularia peruviana (L.) Small | 3 | OR | |
| Verbenaceae | Glandularia selloi (Spreng.) Tronc. | 3.4 | OR | |
| Rubiaceae | Guettarda uruguensis Cham. & Schltdl. | 1 | OR | |
| Orchidaceae | Habenaria parviflora | 4 | OR | |
| Amaryllidaceae | Habranthus gracilifolius Herb. | 3 | OR | |
| Lythraceae | Heimia salicifolia (Kunth) Link | 3 | M | |
| Boraginaceae | Heliotropium curassavicum | 2 | P | M |
| Iridaceae | Herbertia lahue (Molina) Goldblatt | 3 | M-OR | |
| Limnocharitaceae | Hydrocleys nymphoides (Willd.) Buchenau | 2 | OR | |
| Apiaceae | Hydrocotyle bonariensis Lam. | 1, 2, 3 | M-OR | |
| Apiaceae | Hydrocotyle ranunculoides L. f. | 2 | M-OR | |
| Hypoxidaceae | Hypoxis decumbens L. | 1.3 | OR | |
| Convolvulaceae | Ipomoea alba L. | 1 | OR | |
| Convolvulaceae | Ipomoea sp. | 1 | M-OR | |
| Poaceae | Ischaemum minus J. Presl | 2.3 | FO-OR | |
| Isoetaceae | Isoëtes weberi Herter | 2 | P | OR |
| Asteraceae | Jaegeria hirta (Lag.) Less. | 2.3 | M | |
| Malpighiaceae | Janusia guaranitica (A. St.-Hil.) A. Juss. | 1 | OR | |
| Santalaceae | Jodina rhombifolia (Hook. & Arn.) Reissek | 1 | M-OR-T | |
| Juncaceae | Juncus acutus L. | 2 | OR | |
| Juncaceae | Juncus sp. | 3 | OR | |
| Asteraceae | Jungia floribunda Less. | 1.2 | M | |
| Verbenaceae | Lantana camara L. | 1 | M-OR | |
| Verbenaceae | Lantana megapotamica (Spreng.) Tronc. | 1 | M-OR | |
| Poaceae | Leersia hexandra Sw. | 1.3 | FO |