![An Australian Government Initiative [logo]](/images/austgovt_brown_90px.gif)
Heterogonium
Key ex Holttum 1975, Philip. J. Biol. 4:209
Species in Papuasia
| 1a. | Veins free or with irregular slight anastomoses in sterile fronds | 2 |
| Veins anastomosing in sterile fronds, at least in one series of costal areoles | H. subaequale | |
| 2a. | Sori indusiate | H. rufescens |
| Sori exindusiate | 3 | |
| 3a. | Stipe glossy; pinna-lobes entire | H. obscurum |
| Stipe not glossy; larger pinna-lobes crenate | H. novoguineense |