| Fabaceae | |
Xylophacos amphioxys
| (A. Gray) Rydb. | Bull. Torrey Bot. Club 32(12): 662 | 1905 [1906] |
| Fabaceae | |
Xylophacos aragalloides
| Rydb. | Bull. Torrey Bot. Club 34(1): 48–49 | 1907 |
| Fabaceae | |
Xylophacos argentinus
| Rydb. | Bull. Torrey Bot. Club 52(7): 371 | 1925 |
| Fabaceae | |
Xylophacos argophyllus
| (Nutt.) Rydb. | Bull. Torrey Bot. Club 40(2): 49 | 1913 |
| Fabaceae | |
Xylophacos blyae
| Rose ex Rydb. | N. Amer. Fl. 24(5): 303 | 1929 |
| Fabaceae | |
Xylophacos brachylobus
| (A. Gray) Rydb. | Bull. Torrey Bot. Club 52(4): 154 | 1925 |
| Fabaceae | |
Xylophacos candelarius
| (E. Sheld.) Rydb. | Bull. Torrey Bot. Club 52(7): 370 | 1925 |
| Fabaceae | |
Xylophacos casei
| (A. Gray) Rydb. | Bull. Torrey Bot. Club 52(4): 146 | 1925 |
| Fabaceae | |
Xylophacos castaneiformis
| (S. Watson) Rydb. | Bull. Torrey Bot. Club 52(4): 155 | 1925 |
| Fabaceae | |
Xylophacos chloridae
| (M.E. Jones) Rydb. | Bull. Torrey Bot. Club 52(4): 153 | 1925 |
| Fabaceae | |
Xylophacos cibarius
| (E. Sheld.) Rydb. | Bull. Torrey Bot. Club 40(2): 48 | 1913 |
| Fabaceae | |
Xylophacos coccineus
| (Parry) A. Heller | Muhlenbergia 2(2A): 217 | 1906 |
| Fabaceae | |
Xylophacos consectus
| (E. Sheld.) Rydb. | Bull. Torrey Bot. Club 40(2): 49 | 1913 |
| Fabaceae | |
Xylophacos cuspidocarpus
| (E. Sheld.) Rydb. | Bull. Torrey Bot. Club 40(2): 48 | 1913 |
| Fabaceae | |
Xylophacos cyaneus
| (A. Gray) Rydb. | Bull. Torrey Bot. Club 52(4): 154 | 1925 |
| Fabaceae | |
Xylophacos cymboides
| (M.E. Jones) Rydb. | Bull. Torrey Bot. Club 40(2): 49 | 1913 |
| Fabaceae | |
Xylophacos eurekensis
| (M.E. Jones) Rydb. | Fl. Rocky Mts. 1063 | 1917 |
| Fabaceae | |
Xylophacos funereus
| (M.E. Jones) Rydb. | Bull. Torrey Bot. Club 52(7): 367 | 1925 |
| Fabaceae | |
Xylophacos glareosus
| (Douglas) Rydb. | Fl. Rocky Mts. 1063 | 1917 |
| Fabaceae | |
Xylophacos incurvus
| Rydb. | Bull. Torrey Bot. Club 52(7): 366–367 | 1925 |
| Fabaceae | |
Xylophacos inflexus
| (Douglas) Rydb. | Bull. Torrey Bot. Club 40(2): 49 | 1913 |
| Fabaceae | |
Xylophacos iodanthus
| (S. Watson) Rydb. | Bull. Torrey Bot. Club 52(4): 144 | 1925 |
| Fabaceae | |
Xylophacos iodopetalus
| Rydb. | Bull. Torrey Bot. Club 52(4): 152–153 | 1925 |
| Fabaceae | |
Xylophacos lagopinus
| Rydb. | Bull. Torrey Bot. Club 52(7): 372 | 1925 |
| Fabaceae | |
Xylophacos lectulus
| (S. Watson) Rydb. | Bull. Torrey Bot. Club 52(7): 371 | 1925 |
| Fabaceae | |
Xylophacos lenophyllus
| Rydb. | Fl. Rocky Mts. 1126 | 1922 |
| Fabaceae | |
Xylophacos leucolobus
| (S. Watson ex M.E. Jones) Rydb. | Bull. Torrey Bot. Club 52(7): 371 | 1925 |
| Fabaceae | |
Xylophacos marianus
| Rydb. | Bull. Torrey Bot. Club 52(5): 233–234 | 1925 |
| Fabaceae | |
Xylophacos medius
| Rydb. | Bull. Torrey Bot. Club 52(5): 232–233 | 1925 |
| Fabaceae | |
Xylophacos melanocalyx
| Rydb. | Bull. Torrey Bot. Club 52(4): 149–150 | 1925 |
| Fabaceae | |
Xylophacos missouriensis
| (Nutt.) Rydb. | Fl. S.E. U.S. 620 | 1903 |
| Fabaceae | |
Xylophacos musiniensis
| (M.E. Jones) Rydb. | Bull. Torrey Bot. Club 40(2): 49 | 1913 |
| Fabaceae | |
Xylophacos newberryi
| (A. Gray) Rydb. | Bull. Torrey Bot. Club 32(12): 662 | 1905 [1906] |
| Fabaceae | |
Xylophacos nudisiliquus
| (A. Nelson) Rydb. | Bull. Torrey Bot. Club 52(7): 368 | 1925 |
| Fabaceae | |
Xylophacos parryi
| (A. Gray) Rydb. | Bull. Torrey Bot. Club 32(12): 662 | 1905 [1906] |
| Fabaceae | |
Xylophacos pephragmenus
| (M.E. Jones) Rydb. | Bull. Torrey Bot. Club 52(4): 151 | 1925 |
| Fabaceae | |
Xylophacos puniceus
| (Osterh.) Rydb. | Bull. Torrey Bot. Club 40(2): 48 | 1913 |
| Fabaceae | |
Xylophacos purshii
| (Douglas) Rydb. | Bull. Torrey Bot. Club 32(12): 662 | 1905 [1906] |
| Fabaceae | |
Xylophacos pygmaeus
| (Nutt.) Rydb. | Bull. Torrey Bot. Club 32(12): 662 | 1905 [1906] |
| Fabaceae | |
Xylophacos remulcus
| (M.E. Jones) Rydb. | Bull. Torrey Bot. Club 52(4): 153 | 1925 |
| Fabaceae | |
Xylophacos shortianus
| (Nutt.) Rydb. | Fl. S.E. U.S. 1332 | 1903 |
| Fabaceae | |
Xylophacos stipularis
| (M.E. Jones) Rydb. | Fl. Rocky Mts. 1063 | 1917 |
| Fabaceae | |
Xylophacos subvillosus
| Rydb. | Bull. Torrey Bot. Club 52(7): 368 | 1925 |
| Fabaceae | |
Xylophacos tephrodes
| (A. Gray) Rydb. | Bull. Torrey Bot. Club 52(4): 156 | 1925 |
| Fabaceae | |
Xylophacos tidestromii
| Rydb. | Bull. Torrey Bot. Club 52(4): 155 | 1925 |
| Fabaceae | |
Xylophacos uintensis
| (M.E. Jones) Rydb. | Bull. Torrey Bot. Club 32(12): 662 | 1905 [1906] |
| Fabaceae | |
Xylophacos utahensis
| (Torr.) Rydb. | Bull. Torrey Bot. Club 40(2): 49 | 1913 |
| Fabaceae | |
Xylophacos ventosus
| Rydb. | Bull. Torrey Bot. Club 52(7): 370 | 1925 |
| Fabaceae | |
Xylophacos vespertinus
| (E. Sheld.) Rydb. | Bull. Torrey Bot. Club 32(12): 662 | 1905 [1906] |
| Fabaceae | |
Xylophacos watsonianus
| (Kuntze) Rydb. | Bull. Torrey Bot. Club 40(2): 49 | 1913 |
| Fabaceae | |
Xylophacos webberi
| (A. Gray) Rydb. | Bull. Torrey Bot. Club 52(4): 151 | 1925 |
| Fabaceae | |
Xylophacos zionis
| (M.E. Jones) Rydb. | Bull. Torrey Bot. Club 40(2): 48 | 1913 |