| Name | Acrochaetium virgatulum f. luxurians (J. Agardh ex Kützing) Collins |
| Authorship | (J. Agardh ex Kützing) Collins |
| Rank | Forma |
| Placed in | Acrochaetium virgatulum (Harvey) Batters |
| Holdings | 9 Specimens held in the Harvard University Herbaria identified as Acrochaetium virgatulum f. luxurians (J. Agardh ex Kützing) Collins |
| Identification made in | [no date] (9) |