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

16. Cyrtomium atropunctatum Sa. Kurata, Sci. Rep. Yokosuka City Mus. 8: 46. 1964.

黑点贯众 hei dian guan zhong

Cyrtomium fortunei J. Smith var. atropunctatum (Sa. Kurata) K. Iwatsuki.

Plants up to 80 cm tall. Rhizome erect, densely covered with brown scales. Stipe stramineous, up to 35 cm, 3-4 mm in diam. at base, lower portion densely scaly; scales brown, ovate, ovate-lanceolate, or lanceolate, ca. 5 × 1.2 mm, margins irregularly ciliate, apex caudate. Lamina oblong-lanceolate, up to 54 × 18 cm, base slightly contracted, 1-imparipinnate, apex obtuse; rachis with sparse lanceolate or linear brown scales. Lateral pinnae 15-20 pairs, alternate, nearly spreading, shortly stalked, lanceolate; middle pinnae 9-12 × 2.3-2.7 cm, slightly oblique at base, serrate, acroscopic margins cuneate and without auricles, basiscopic margins cuneate, apex acuminate; terminal pinna ovate-lanceolate, sometimes lower portion with 1 or 2 lobes, 5-8 × 1.8-2.5 cm; papery, abaxially with linear microscales, glabrous adaxially; venation pinnate, slightly raised abaxially, indistinct adaxially, veinlets anastomosing to form 5 or 6 rows of areoles. Sori dense on abaxial surface of pinnae, pinna apices often sterile; indusia blackish brown at center, brown at edge, lacerate.

Forests; ca. 2000 m. Taiwan (Yilan) [S Japan].

Cyrtomium atropunctatum is an apomictic species.

Sometimes, this species is recognized as a variety, Cyrtomium fortunei var. atropunctatum.


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