| Equisetum bogotense Kunth | W. W. Rowlee 864 | Costa Rica. "Cola de Caballo" Road side halfway up Irazy Volcano. | | 3964679 |  |
| Equisetum bogotense Kunth | A. Jiménez M. 3663 | Costa Rica. A la par del puente del Rio La Paz, frente a la Catarata. | | 3845881 |  |
| Equisetum bogotense Kunth | W. C. Burger 5281 | Costa Rica. San José. Near the escarpment with frequent wind and rain from the Caribbean. La Palma area, northeast of San Jeronimo, above the La Hondura valley. | | 3845856 |  |
| Equisetum bogotense Kunth | W. C. Burger 6792 | Costa Rica. Cartago. About 15 km. south of Tapanti along the new road, on the east slope above the Rio Grand de Orosi near the concrete bridge at 1500 m. altitude. | | 3845857 |  |
| Equisetum bogotense Kunth | A. M. Brenes 20442 | Costa Rica. Alajuela. San Miguel de San Ramon. | | 3845860 |  |
| Equisetum bogotense Kunth | A. M. Brenes 19321 | Costa Rica. Alajuela. Carrillos de Poas. | | 3845861 |  |
| Equisetum bogotense Kunth | W. C. Burger 5643 | Costa Rica. Cartago. About 10 km. south of Tapantl along the new road on the east slope above the Rio Grande de Orosi. | | 3845863 |  |
| Equisetum bogotense Kunth | K. Lems s.n. | Costa Rica. Heredia. S. slope of Volcan Barba, above the town of Barba. | | 3845870 |  |
| Equisetum bogotense Kunth | W. C. Burger 11071 | Costa Rica. San José. Near the escarpment with frequent wind and rain from the Caribbean. La Palma area, northeast of San Jeronimo, above the La Hondura valley. | | 3845872 |  |
| Equisetum bogotense Kunth | A. R. Smith 2193 | Costa Rica. Cartago. Along trail leading eastward into mountains from road into Tapanti Reserve ca. 1 km S of jct. of Quebrada Salto and Rio Grande de Orosi. Also known as "Quebrada Val Verde.". | | 3845875 |  |
| Equisetum bogotense Kunth | K. A. Barringer 3881 | Costa Rica. Alajuela. Along Rio San Lorenzo, above Colonia Palmarena at UCR Reserva. | | 3845877 |  |
| Equisetum bogotense Kunth | J. T. Mickel 1903 | Costa Rica. Cartago. Tapani, ca. 15 km S of Paraiso. Trail through wet forest along steep bank of the river. | | 3964677 |  |
| Equisetum bogotense Kunth | J. T. Mickel 2312 | Costa Rica. Cartago. Tapanti, ca. 15 km S of Paraiso. | | 3964678 |  |
| Equisetum bogotense Kunth | R. L. Hauke 331 | Costa Rica. San José. San Isidro Coronado. | | 3964683 |  |
| Equisetum bogotense Kunth | R. L. Hauke 360 | Costa Rica. Cartago. North of Dulce Nombre de Tres Rios. Banks of Barranca. | | 3964684 |  |
| Equisetum bogotense Kunth | R. L. Hauke 360 | Costa Rica. Cartago. North of Dulce Nombre de Tres Rios. Banks of a Barranca. | | 3964685 |  |
| Equisetum bogotense Kunth | L. O. Williams 28883 | Costa Rica. Alajuela. On moist bank along river... near Tapesco River, Cordillera Central, about 10 km. north of Zarcero. | | 3845878 |  |
| Equisetum bogotense Kunth | R. L. Hauke 208 | Costa Rica. Cartago. Orosi Valley, path along south side of Río Grande de Orosi, east of bridge to Tapanti. | | 3964699 |  |
| Equisetum bogotense Kunth | S. R. Hill 17855 | Costa Rica. Cartago. W slope of Cerro Duan, ca. 3 km above Guabata, E of Rio Grande de Orosi. | | 3845876 |  |
| Equisetum bogotense Kunth | L. Acosta 593 | Costa Rica. Cartago. Paraíso (Canton). P.N. Tapantí-Macizo de La Muerte. Cuenca del Reventazón. Colecta alrededr del segundo puente. | | 3964680 |  |