Table 1.

Main morphological differences amongst Cyrtomiumadenotrichum and C.nephrolepioides, C.obliquum, C.sinningense and C.calcis.

Morphological traits	C.adenotrichum	C.nephrolepioides	C.obliquum	C.sinningense	C.calcis
Plant height	5–15 cm	12–28 cm	20–35 cm	8–12 cm	13–23 cm
Stipe	3–10 cm, 1 mm in diam., sparsely glandular	3–10 cm, 1–2 mm in diam., glabrous	6–10 cm, 1–2 mm in diam., glabrous	5–7 cm, 1 mm in diam., glabrous	15 cm, 1–3 mm in diam., glabrous
Scales margins	fimbriate	fimbriate	dentate	Dentate	fimbriate-dentate
Lamina	linear-lanceolate, 5–10 × 1.5–2 cm	linear-lanceolate, 10–25 × 2–5 cm	lanceolate, 13–35 × 3–5 cm	ovate or oblong-lanceolate, 3–7 × 2.5–3 cm	lanceolate-oblong, 13–23 × 1.9 cm
Lateral pinnae	5–10 pairs	10–26 pairs	12–21 pairs	1–4 pairs	9–14 pairs
Pinnae	0.8–1 × 0.4–0.6 cm	1–2.5 × 0.6–1.2 cm	2–3 × 1–1.5 cm	1.2–1.6 × 1–1.2 cm	1.5–3.5 × 1.2–1.9 cm
Base	obvious oblique	cordate or sometimes obliquely cordate	oblique	broadly cuneate	cordate to hastate
Texture	thin leathery	thick- leathery	leathery	Leathery	thick leathery
Venation	midrib flat or slightly concave on both surfaces	midrib concave on both surfaces	slightly raised abaxially, slightly concave adaxially	indistinct on both surfaces	obscure
Rows of areolae	1 or 2	2 or 3	2	2 or 3	2, 3, rarely to 4
Indusia margins	dentate	subentire	entire	subentire	dentate