| Name | Lophotocarpus calycinus var. spongiosus (Engelmann) Fassett |
| Authorship | (Engelmann) Fassett |
| Rank | Variety |
| Placed in | Lophotocarpus calycinus (Engelmann) J. G. Smith |
| Citation | 1922 Rhodora 24: 73 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Lophotocarpus calycinus var. spongiosus (Engelmann) Fassett |
| Identification made in | [no date] (2) |
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