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

2. Cyrtomium shingianum H. S. Kung & P. S. Wang, Chin. J. Appl. Environm. Biol. 3(1): 23. 1997.

邢氏贯众 xing shi guan zhong

Plants ca. 45 cm tall. Rhizome erect, short, densely covered with lanceolate brown scales. Stipe stramineous, 25-34 cm, ca. 3 mm in diam. at base; lower portion densely scaly; scales brown or dark brown at middle, narrowly ovate or lanceolate, margins fimbriate. Lamina oblong-ovate, 18-24 × 12-14 cm, base not contracted, 1-imparipinnate, apex acuminate; rachis covered abaxially with linear brown scales. Lateral pinnae 5-7 pairs, alternate, attached nearly spreading or slightly ascendant, shortly stalked, oblong-ovate; middle pinnae 6-7 × 2-2.5 cm, base shallowly obliquely cordate or subtruncate, margins entire, apex acuminate; terminal pinna ovate, lower portion with 2 lobes or not lobed, 4-7 × 3-6 cm; leathery, glabrous abaxially, lustrous adaxially; venation pinnate, slightly raised abaxially, indistinct adaxially, veinlets anastomosing to form 2 or 3 rows of areoles on each side of midrib. Sori in 2 or 3 irregular rows on each side of midrib; indusia margins subentire. 2n = ca. 164*.

● Limestone crevices in Pinus forests; ca. 800 m. S Guizhou (Libo).

Cyrtomium shingianum could be an allotetraploid of hybrid origin, with C. grossum being possibly its female parent based on chloroplast data.


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