| Name | Mesembryanthemum rigidum Haworth |
| Authorship | Haworth |
| Rank | Species |
| Placed in | Mesembryanthemum |
| Citation | 1803 Misc. Nat. 95 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Mesembryanthemum rigidum Haworth |
| Identification made in | [no date] (2) |
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