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Cyrtomium obliquum

Description from Flora of China

Cyrtomium calcicola Ching; C. wangianum Ching & K. H. Shing.

Plants 20-35 cm tall. Rhizome erect, densely covered with lanceolate brown scales. Stipe stramineous, 6-10 cm, 1-2 mm in diam. at base, densely scaly; scales brown, ovate or lanceolate, margins dentate. Lamina lanceolate, 13-35 × 3-5 cm, base slightly contracted, 1-imparipinnate, apex acuminate; rachis abaxially densely covered with lanceolate brown toothed scales. Lateral pinnae 12-21 pairs, alternate, spreading, shortly stalked, deltoid-ovate; middle pinnae 2-3 × 1-1.5 cm, base oblique, acroscopic margins arc-shaped, basiscopic margins broadly cuneate, entire, apex obtuse; terminal pinna broadly lanceolate or nearly rhombic, lower portion often with 1 or 2 lobes, 2-2.5 × 1.2-2 cm; leathery, glabrous on both surfaces; venation pinnate, slightly raised abaxially, slightly concave adaxially, veinlets anastomosing to form 2 rows of areoles on each side of midrib. Sori 1 or 2 rows on each side of midrib; indusia margins entire.

Cyrtomium obliquum has both sexual and apomictic reproductive forms.

● On rocks in forests or shaded places. Guangdong (Ruyuan), Guangxi (Hexian, Lingui), Zhejiang (Suichang).


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