| Engelmann, G. | 1878 |
Coniferae
| Rep. U.S. Geogr. Surv., Wheeler | 6: 255–264 |
| Engelmann, G. | 1878 |
Amaryllideae
| Rep. U.S. Geogr. Surv., Wheeler | 6: 267–268 |
| Engelmann, G. | 1878 |
Junceae
| Rep. U.S. Geogr. Surv., Wheeler | 6: 272–274 |
| Engelmann, G. | 1878 |
Asclepiadeae
| Rep. U.S. Geogr. Surv., Wheeler | 6: 187–189 |
| Engelmann, G. | 1878 |
Cuscutineae
| Rep. U.S. Geogr. Surv., Wheeler | 6: 206–207 |
| Engelmann, G. | 1878 |
Loranthaceae
| Rep. U.S. Geogr. Surv., Wheeler | 6: 251–254 |
| Engelmann, G. | 1878 |
Cactaceae
| Rep. U.S. Geogr. Surv., Wheeler | 6: 127–132 |
| Engelmann, G. | 1878 |
Gentianaceae
| Rep. U.S. Geogr. Surv., Wheeler | 6: 189–197 |
| Engelmann, G. | 1878 |
Euphorbiaceae
| Rep. U.S. Geogr. Surv., Wheeler | 6: 242–248 |
| Engelmann, G. | 1878 |
Cupuliferae
| Rep. U.S. Geogr. Surv., Wheeler | 6: 249–251 |
| Loew, O. | 1878 |
Report on the geographical distribution of vegetation in the Mohave Desert.
| Rep. U.S. Geogr. Surv., Wheeler | 222–224 |
| Rothrock, J. T. | 1878 |
Notes on Colorado
| Rep. U.S. Geogr. Surv., Wheeler | 6: 3–14 |
| Rothrock, J. T. | 1878 |
Notes on New Mexico
| Rep. U.S. Geogr. Surv., Wheeler | 6: 17–37 |
| Rothrock, J. T. | 1878 |
Notes on Economic Plants
| Rep. U.S. Geogr. Surv., Wheeler | 6: 41–52 |
| Rothrock, J. T. | 1878 |
Catalogue of plants collected in Nevada, Utah, Colorado, New Mexico and Arizona
| Rep. U.S. Geogr. Surv., Wheeler | 6: 55–297, pl. 1–30 |