| Title | Yuccas of the Southwestern United States. Jamaica Plain, MA |
| Abbreviation | Yuccas Southw. U.S. |
| Authors | S. A. McKelvey |
| Publication Dates | Part 1, 1938; part 2, 1947 |
| TL2 | 5.185 |
The Harvard University Herbaria hold 13 type specimens of taxa described in this publication
Yucca newberryi McKelvey [Holotype] 1947, 2: 49Yucca pallida McKelvey [Holotype] 1947, pt. 2, 57
Yucca standleyi McKelvey [Holotype] 1947, pt. 2, 108
Yucca treculeana var. succulenta McKelvey [Holotype] 1938, 80, pls. 37, 38, 39
Yucca utahensis McKelvey [Holotype] 1947, pt. 2: 94
Yucca confinis McKelvey [Type] 1938, 49, pls. 16, 17, 18
Yucca glauca var. gurneyi McKelvey [Type] 1947, pt. 2: 169, tab. 61
Yucca intermedia var. ramosa McKelvey [Type] 1947, pt. 2: 120, tab. 47
Yucca intermedia var. ramosa McKelvey [Type] 1947, pt. 2: 120, tab. 47
Yucca arkansana var. paniculata McKelvey [Type] 1947, 2: 156
Yucca baccata var. vespertina McKelvey [Type] 1938, 1: 45
Yucca campestris McKelvey [Type] 1947, pt 2: 173
Yucca verdiensis McKelvey [Holotype] 1947, 2: 98