Key to the common species of Hypoglossum
| 1 | Not all cells of 2nd order rows bear 3rd order rows | H. simulans Wynne, Price, Ballantine |
| 1 | All cells of 2nd order rows bear 3rd order rows | 2 |
| 2 | Plants erect, blades occasionally with marginal rhizoids | H. wynnei Abbott |
| 2 | Plants prostrate, repetitive blades fastened to substratum at bases and apices | H. caloglossoides Wynne & Kraft |
Back to Common Hawaiian Red Algal Genera