| Name | Youngia tenuifolia subsp. tenuicaulis Babcock & Stebbins |
| Authorship | Babcock & Stebbins |
| Rank | Subspecies |
| NomenclaturalStatus | NomLeg |
| Placed in | Youngia tenuifolia (Willdenow) Babcock & Stebbins |
| Citation | 1937 Publ. Carnegie Inst. Wash. 484: 52 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Youngia tenuifolia subsp. tenuicaulis Babcock & Stebbins |
| Identification made in | [no date] (1), 1941 (1) |