1	Scales on rachis dense, ovate-lanceolate or linear-lanceolate, herbaceous, thin, toothed or entire		(2)
+	Scales on rachis sparse, linear-lanceolate, leathery, entire		(6)
2 (1)	Scales on rachis ovate, toothed		(3)
+	Scales on rachis lanceolate or linear-lanceolate, entire or toothed		(4)
3 (2)	Lamina bipinnate, pinnules entire or serrate; scales on rachis dark brown.		104 D. lepidorachis
+	Lamina tripinnate or bipinnate, pinnules serrate to pinnatifid; scales on rachis brown.		105 D. tsoongii
4 (2)	Upper stipe and rachis with only scattered scales.		106 D. kinkiensis
+	Upper stipe and rachis densely scaly		(5)
5 (4)	Scales on rachis usually entire.		107 D. simasakii
+	Scales on rachis toothed.		108 D. championii
6 (1)	Lamina 1-pinnate; pinnae serrate or deeply lobed on margin but lobes sessile.		98 D. decipiens
+	Lamina bipinnate or at least at lamina base; pinnules shortly stalked or sessile		(7)
7 (6)	Lamina shorter than 28 cm; lower pinnae with 0-3 pairs of free lobes or pinnules; scales flat.		99 D. liboensis
+	Lamina exceeding 30(-50) cm; lower pinnae with more than 10 pinnule pairs; scales bullate		(8)
8 (7)	Pinnules triangular-ovate, serrate or pinnatifid, obtuse at apex		(9)
+	Pinnules lanceolate, pinnatisect or pinnately parted, acuminate at apex		(10)
9 (8)	Pinnules serrate; sori costal or subcostal.		100 D. fuscipes
+	Pinnules pinnatifid; sori medial to submarginal.		101 D. ryo-itoana
10 (8)	Pinnules pinnately lobed; bullate scales dense on costa and rachis; indusium dark red at center.		102 D. erythrosora
+	Pinnules pinnate; bullate scales sparse on costa and rachis; indusium light red at center.		103 D. hondoensis