| Engelmann, G. | 1882 |
The female flowers of the Coniferae
| Amer. J. Sci. Arts, ser. 3 | 24(2): 233–235 |
| Engelmann, G. | 1882 |
On the female flowers of the Coniferae
| Amer. J. Sci. Arts, ser. 3 | 23(2): 418–421 |
| Engelmann, G. & A. Gray | 1879 |
The gymnospermy of Coniferae, by L. Celakovsky
| Amer. J. Sci. Arts, ser. 3 | 18: 311–313 |
| Gray, A. | 1885 |
Augustus Fendler
| Amer. J. Sci. Arts, ser. 3 | 29: 169–171 |
| Robinson, B. L. & J. M. Greenman | 1895 |
New and noteworthy plants chiefly from Oaxaca collected by Messrs. C. G. Pringle, L. C. Smith and E. W. Nelson
| Amer. J. Sci. Arts, ser. 3 | 50: 150–168 |