| 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) | 
