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FOC | Family List | FOC Vol. 2-3 | Dryopteridaceae | Cyrtomium

30. Cyrtomium aequibasis (C. Christensen) Ching, Bull. Chin. Bot. Soc. 2(2): 99. 1936.

等基贯众 deng ji guan zhong

Cyrtomium caryotideum (Wallich ex Hooker & Greville) C. Presl var. aequibasis C. Christensen, Amer. Fern J. 20(2): 51. 1930; C. cuneatum Ching; C. houi Ching.

Plants 30-50 cm tall. Rhizome erect, densely covered with lanceolate blackish brown scales. Stipe stramineous, 22-36 cm, 2-3 mm in diam. at base, lower portion scaly; scales blackish brown, ovate or lanceolate, margins ciliate, often twisted. Lamina oblong or oblong-lanceolate, 30-40 × 12-20 cm, base not contracted, 1-imparipinnate, apex obtuse; rachis with sparse linear curved brown scales or glabrous. Lateral pinnae 4-6 pairs, alternate, slightly ascendant, shortly stalked, lanceolate; middle pinnae 10-16 × 2.2-3.5 cm, base cuneate, margins serrulate, apex acuminate or caudate; terminal pinna ovate or rhombic-ovate, forked or trifurcate, 11-13 × 5-8 cm; papery or hard papery, glabrous on both surfaces; venation pinnate, slightly raised on both surfaces, veinlets anastomosing to form 3-5 rows of areoles. Sori throughout abaxial surface of pinnae; indusia margins toothed. 2n = 123*.

● Limestone rocks in forests; 600-2000 m. Chongqing, Guizhou (Duyun), Sichuan, Yunnan (Longling, Maguan, Mengzi, Wenshan).

Cyrtomium aequibasis is a sexual and apomictic species.


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