| Greenia Nutt., 1835 |
| Greenia arkansana Nutt., 1835 |
| Griffithsochloa G. J. Pierce, 1978 |
| Griffithsochloa multifida (Griffiths) G.J. Pierce, 1978 |
| Guadua Kunth, 1822 |
| Guadua (Kunth) Hack., 1887 |
| Guadua aculeata Rupr. ex E. Fourn., 1886 |
| Guadua aculeata var. aculeata Rupr. ex E. Fourn., 1886 |
| Guadua aculeata var. liebmanniana E.G. Camus, 1913 |
| Guadua amplexifolia J. Presl, 1830 |
| Guadua angustifolia Kunth, 1822 |
| Guadua angustifolia var. bicolor Londoño, 1989 |
| Guadua flabellata E. Fourn., 1885 |
| Guadua inermis Rupr. ex E. Fourn., 1886 |
| Guadua intermedia Rupr. ex E. Fourn., 1886 |
| Guadua longifolia (E. Fourn.) R.W. Pohl, 1992 |
| Guadua pallescens Döll, 1880 |
| Guadua paniculata Munro, 1868 |
| Guadua spinosa (Swallen) McClure, 1954 |
| Guadua tuxtlensis Londoño & Ruiz-Sanchez, 2014 |