| Title | North American Trees |
| Abbreviation | N. Amer. Trees |
| Authors | N. L. Britton: J. A. Shafer |
| Publication Dates | 9 May 1908 (Apr 1908 fide Barnhart) |
| TL2 | 783 |
The Harvard University Herbaria hold 3 type specimens of taxa described in this publication
Acacia subtortuosa Shafer [Isosyntype] 1908, 524Acacia subtortuosa Shafer [Isosyntype] 1908, 524
Fraxinus smallii Britton [Isotype] 1908, 805