Stipe short, mostly bearing spreading hairs; lamina thin and translucent to leathery or fleshy.
Sori superficial, arranged in a single row on each side of the midvein, circular or elliptic, sometimes confluent.
The genera Notogrammitis and Grammitis are challenging to differentiate in a key. For this reason the keys to species under Grammitis covers both genera.
| | Key to the species | |
| 1 | Frond covered in red-brown, spreading hairs | 2 |
| Frond glabrous or with hairs on stipe and frond base only | 3 |
| 2 | Hairs 0.5–2 mm long; fronds 3–8 cm long including stipe | Grammitis nudicarpa |
| Hairs 2–4 mm long; fronds 6–25 cm long including stipe
Back to 1 | Grammitis wattsii |
| 3 | Frond outline linear, margin entire, glabrous | 4 |
| Frond outline narrowly obovate to oblanceolate, margin often faintly scalloped, glabrous or with hairs on stipe
Back to 1 | 5 |
| 4 | Frond to 9 cm long and 6 mm wide; hydathodes present on upper surface; rhizome scales spreading or appressed, 3–5 mm long | Grammitis stenophylla |
| Frond to 25 cm long and 9 mm wide; hydathodes not present on upper surface; rhizome scales spreading, c. 10 mm long
Back to 3 | Grammitis diminuta |
| Fronds usually >5 cm long; stipe conspicuously hairy; sori elliptic, coalescing or not but maintaining two discrete rows either side of midrib; rhizome erect to short-creeping
Back to 3 | Notogrammitis billardierei |
| 5 | Fronds usually <5 cm long; stipe lacking hairs; sori circular, and coalescing into a raised mass towards the tip of the lamina; rhizome long-creeping | Notogrammitis crassior |
