| Name | Petrophytum caespitosum var. elatius (S. Watson) Tidestrom |
| Authorship | (S. Watson) Tidestrom |
| Rank | Variety |
| Placed in | Petrophytum caespitosum (Nuttall) Rydberg |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Petrophytum caespitosum var. elatius (S. Watson) Tidestrom |
| Identification made in | [no date] (4) |
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