| Name | Pterosiphonia robusta var. inermis N. L. Gardner |
| Authorship | N. L. Gardner |
| Rank | Variety |
| Placed in | Pterosiphonia robusta N. L. Gardner |
| Citation | 1927 Univ. Calif. Publ. Bot. 14: 102 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Pterosiphonia robusta var. inermis N. L. Gardner |
| Identification made in | [no date] (2) |
Copyright © 2013 The President and Fellows of Harvard College | Accessibility