| 1 | Native | Northern America | South-Central U.S.A. | United States | Texas | | Godfrey, R. K. & J. W. Wooten. 1979-1981. Aquatic and wetland plants of southeastern United States, 2 vol. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Alabama | | Godfrey, R. K. & J. W. Wooten. 1979-1981. Aquatic and wetland plants of southeastern United States, 2 vol. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Arkansas | | Godfrey, R. K. & J. W. Wooten. 1979-1981. Aquatic and wetland plants of southeastern United States, 2 vol. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Florida | http://www.plantatlas.usf.edu/main.asp?plantID=3111 | Godfrey, R. K. & J. W. Wooten. 1979-1981. Aquatic and wetland plants of southeastern United States, 2 vol. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Georgia | | Godfrey, R. K. & J. W. Wooten. 1979-1981. Aquatic and wetland plants of southeastern United States, 2 vol. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Louisiana | | Godfrey, R. K. & J. W. Wooten. 1979-1981. Aquatic and wetland plants of southeastern United States, 2 vol. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Mississippi | | Godfrey, R. K. & J. W. Wooten. 1979-1981. Aquatic and wetland plants of southeastern United States, 2 vol. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | North Carolina | | Godfrey, R. K. & J. W. Wooten. 1979-1981. Aquatic and wetland plants of southeastern United States, 2 vol. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | South Carolina | | Radford, A. E. et al. 1964. Manual of the vascular flora of the Carolinas. |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Virginia | s.e. | Godfrey, R. K. & J. W. Wooten. 1979-1981. Aquatic and wetland plants of southeastern United States, 2 vol. |
| 1 | Native | Northern America | Southern Mexico | Mexico | Veracruz de Ignacio de la Llave | | |
| 1 | Native | Southern America | Brazil | Brazil | Rio Grande do Sul | | Reitz, R., ed. 1965-. Flora ilustrada catarinense. Note: lists as Micranthemum umbrosum (Walt.) S. F. Blake |
| 1 | Native | Southern America | Brazil | Brazil | Santa Catarina | | Reitz, R., ed. 1965-. Flora ilustrada catarinense. Note: lists as Micranthemum umbrosum (Walt.) S. F. Blake |
| 1 | Native | Southern America | Caribbean | Cuba | | | León (J. S. Sauget) & Alain (E. E. Liogier). 1946-1969. Flora de Cuba Note: lists as Micranthemum umbrosum (Walt.) S. F. Blake |
| 1 | Native | Southern America | Caribbean | Dominica | | | Howard, R. 1974-1989. Flora of the lesser Antilles. |
| 1 | Native | Southern America | Caribbean | Dominican Republic | | | Liogier, H. A. 1981-. Flora of Hispaniola: Part 1; La Flora de la Española. Part II-. Note: lists as Micranthemum umbrosum (Walt.) S. F. Blake |
| 1 | Native | Southern America | Caribbean | Grenada | | | Howard, R. 1974-1989. Flora of the lesser Antilles. |
| 1 | Native | Southern America | Caribbean | Guadeloupe | | | Howard, R. 1974-1989. Flora of the lesser Antilles. |
| 1 | Native | Southern America | Caribbean | Trinidad and Tobago | Trinidad | | Howard, R. 1974-1989. Flora of the lesser Antilles. |
| 1 | Native | Southern America | Caribbean | United States | Puerto Rico | | Liogier, H. A. 1984-. Descriptive flora of Puerto Rico and adjacent islands. |
| 1 | Native | Southern America | Northern South America | Guyana | | | Boggan, J. et al. 1997. Checklist of the plants of the Guianas, ed. 2 |
| 1 | Native | Southern America | Northern South America | Suriname | | | Boggan, J. et al. 1997. Checklist of the plants of the Guianas, ed. 2 |
| 1 | Native | Southern America | Northern South America | Venezuela | | | Pittier, H. F. et al. 1945-1947. Catálogo de la flora venezolana. Note: lists as Micranthemum umbrosum (Walt.) S. F. Blake |
| 1 | Native | Southern America | Southern South America | Argentina | Buenos Aires | | Zuloaga, F. O. & O. Morrone, eds. 1996, 1999. Catálogo de las plantas vasculares de la República Argentina. I. Pteridophyta, Gymnospermae y Angiospermae (Monocotyledonae), II. Dicotyledonae. Monogr. Syst. Bot. Missouri Bot. Gard. 60, 74. |
| 1 | Native | Southern America | Southern South America | Argentina | Corrientes | | Zuloaga, F. O. & O. Morrone, eds. 1996, 1999. Catálogo de las plantas vasculares de la República Argentina. I. Pteridophyta, Gymnospermae y Angiospermae (Monocotyledonae), II. Dicotyledonae. Monogr. Syst. Bot. Missouri Bot. Gard. 60, 74. |
| 1 | Native | Southern America | Southern South America | Argentina | Entre Ríos | | Zuloaga, F. O. & O. Morrone, eds. 1996, 1999. Catálogo de las plantas vasculares de la República Argentina. I. Pteridophyta, Gymnospermae y Angiospermae (Monocotyledonae), II. Dicotyledonae. Monogr. Syst. Bot. Missouri Bot. Gard. 60, 74. |
| 1 | Native | Southern America | Southern South America | Argentina | Tucumán | | Zuloaga, F. O. & O. Morrone, eds. 1996, 1999. Catálogo de las plantas vasculares de la República Argentina. I. Pteridophyta, Gymnospermae y Angiospermae (Monocotyledonae), II. Dicotyledonae. Monogr. Syst. Bot. Missouri Bot. Gard. 60, 74. |
| 1 | Native | Southern America | Western South America | Ecuador | | | Jørgensen, P. M. & S. León-Yánez, eds. 1999. Catalogue of the vascular plants of Ecuador. Monogr. Syst. Bot. Missouri Bot. Gard. 75 |
| 1 | Native | Southern America | Western South America | Peru | | possibly | Brako, L. & J. L. Zarucchi. 1993. Catalogue of the flowering plants and gymnosperms of Peru. Monogr. Syst. Bot. Missouri Bot. Gard. 45 Note: lists as Micranthemum umbrosum (Walt.) S. F. Blake |