| Name | Kalmia microphylla subsp. occidentalis (Small) Roy L. Taylor & MacBryde |
| Authorship | (Small) Roy L. Taylor & MacBryde |
| Rank | Subspecies |
| Placed in | Kalmia microphylla (Hooker) A. Heller |
| Citation | 1978 Canad. J. Bot. 56(2): 186 |
| Holdings | 37 Specimens held in the Harvard University Herbaria identified as Kalmia microphylla subsp. occidentalis (Small) Roy L. Taylor & MacBryde |
| Identification made in | [no date] (37) |