Asteraceae | Conyza bonariensis (L.) Cronquist | 1.3 |
| M-OR | ||
Poaceae | Cortaderia selloana (Schult. & Schult. f.) Asch. & Graebn. | 2 |
| M-OR-Fi | ||
Asteraceae | Criscia stricta (Spreng.) Katinas | 1 |
| OR | ||
Euphorbiaceae | Croton lanatus Lam. | 1 |
| OR | ||
Euphorbiaceae | Croton sp. | 1 |
| OR | ||
Lythraceae | Cuphea fruticosa Spreng. | 2 |
| M | ||
Lythraceae | Cuphea glutinosa Cham. & Schltdl. | 2 |
| M-OR | ||
Cyperaceae | Cyperus giganteus Vahl | 1 |
| Fi | ||
Cyperaceae | Cyperus sesquiflorus (Torr.) Mattf. & Kük. ex Kük. | 1.2 |
| |||
Cyperaceae | Cyperus spp. | 3 |
| OR | ||
Poaceae | Danthonia montevidensis Hack. & Arechav. | 3 |
| FO | ||
Thymelaeaceae | Daphnopsis racemosa Griseb. | 1.2 |
| OR-Fi | ||
Poaceae | Deyeuxia alba J. Presl | 3 |
| FO-OR | ||
Poaceae | Deyeuxia viridiflavescens (Poir.) Kunth Deyeuxia viridiflavescens (Poir.) Kunth var. montevidensis (Nees) | 2 |
| FO-OR | ||
Poaceae | Cabrera & Rúgolo | 3 |
| FO-OR | ||
Convolvulaceae | Dichondra microcalyx (Hallier f.) Fabris | 1, 2, 3 |
| OR | ||
Convolvulaceae | Dichondra sericea Sw. | 4 |
| OR | ||
Rhamnaceae | Discaria americana Gillies & Hook. | 1 |
| M | ||
Sapindaceae | Dodonaea viscosa Jacq. | 1.4 |
| M-OR | ||
Moraceae | Dorstenia brasiliensis Lam. | 1.3 |
| M | ||
Pteridaceae | Doryopteris triphylla (Lam.) Christ | 1 |
| |||
Droseraceae | Drosera brevifolia Pursh | 2 |
| OR | ||
Bromeliaceae | Dyckia remotiflora Otto & A. Dietr. | 1 |
| OR | ||
Alismataceae | Echinodorus grandiflorus (Cham. & Schltdl.) Micheli | 2 |
| M-OR | ||
Asteraceae | Eclipta elliptica DC. | 2.3 |
| OR | ||
Asteraceae | Eclipta prostrata (L.) L. | 4 |
| M | ||
Pontederiaceae | Eichhornia azurea (Sw.) Kunth | 2 |
| M | ||
Pontederiaceae | Eichhornia crassipes (Mart.) Solms | 2 |
| M | ||
Ephedraceae | Ephedra tweediana Fisch. & C.A. Mey. emend. J.H. Hunz. | 1 |
| M-OR | ||
Equisetaceae | Equisetum giganteum L. | 2.3 |
| M | ||
Poaceae | Eragrostis neesii Trin. | 1 |
| FO | ||
Poaceae | Eragrostis retinens Hack. & Arechav. | 3 |
| FO | ||
Asteraceae | Erechtites valerianifolius (Link ex Spreng.) Less. ex DC. | 4 |
| OR | ||
Poaceae | Erianthus angustifolius Nees | 2.3 |
| OR | ||
Apiaceae | Eryngium eburneum Decne. | 1.3 |
| OR | ||
Apiaceae | Eryngium horridum Malme | 1, 3, 4 |
| OR | ||
Apiaceae | Eryngium nudicaule Lam. | 3 | M-OR | |||
Apiaceae | Eryngium pandanifolium Cham. & Schltdl. | 2 | M-OR-Fi | |||