| Name | Malacothrix saxatilis var. altissima (Greene) R. S. Ferris |
| Authorship | (Greene) R. S. Ferris |
| Rank | Variety |
| Placed in | Malacothrix saxatilis (Nuttall) Torrey & A. Gray |
| Citation | 1958 Contr. Dudley Herb. 5(4): 102 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Malacothrix saxatilis var. altissima (Greene) R. S. Ferris |
| Identification made in | [no date] (4) |
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