11. Arachniodes grossa (Tardieu & C. Christensen) Ching, Acta Bot. Sin. 10: 257. 1962.
粗裂复叶耳蕨 cu lie fu ye er jue
Rumohra grossa Tardieu & C. Christensen, Not. Syst. (Paris) 7: 85. 1938.
Rhizome ascending, woodlike stiff, 3-5 cm in diam., apex densely scaly; scales reddish brown, hairlike, to 2.5 × 0.1 cm, tortuous or twisted, spreading, soft. Fronds approximate, 0.7-1 m; stipe stramineous, 35-55 cm, 5-6 mm in diam., base and lower parts with scales similar to those on rhizome, glabrescent upward; lamina 2-pinnate-pinnatifid, shiny brownish when dried, ovate-deltoid, 35-50 × 22-35 cm, leathery, base rounded-cuneate, apex acuminate, gradually reduced, rachis glabrescent; pinnae 2-4(-7) pairs, alternate or lower 1 or 2 pairs opposite, with to 1.5 cm stalk, obliquely spreading; lowest pinnae deltoid-lanceolate, to 28 × 15 cm, base broadly cuneate, apex long acuminate; (primary) pinnules or lobes 10-15 pairs, proximal ones shortly stalked, separate pinnules lanceolate, ca. 8 × 1.5 cm, proximal basiscopic one sometimes much longer than others to 10 × 1.8 cm, base obliquely cuneate, apex caudate-acuminate, margin deeply pinnatifid, remaining pinnules or lobes ca. 2 × 1 cm, margin pinnatifid or crenate; lobe apex acute or obtuse, ending with a shortly mucronate tip, margin serrulate; upper pinnae lanceolate or linear-lanceolate; veins with a few minute brown subulate scales abaxially. Sori small, terminal on veinlets, in 1 or 2 rows on each side of midvein of ultimate segments, medial between margin and midvein; indusia dark brown, papery, and entire.
Open forests, on wet moss-covered rocks or cliffs along streams, arid steep slopes; 500-1100 m. S Guangdong, S Guangxi, Hainan [N Vietnam].