贵州贯众 gui zhou guan zhong

Plants ca. 70 cm tall. Rhizome erect. Stipe stramineous, ca. 58 cm, ca. 5 mm in diam. at base, lower portion densely scaly; scales brown, ovate or lanceolate, margins fimbriate. Lamina oblong-lanceolate, ca. 42 × 18 cm, base slightly wider, 1-imparipinnate, apex acute; rachis abaxially with sparse linear brown scales. Lateral pinnae 5 pairs, alternate, slightly ascendant, shortly stalked, oblong-lanceolate; middle pinnae 12-14 × 4-5 cm, base obliquely cordate, margins entire, apex long acuminate; terminal pinna narrowly ovate, ca. 11 × 4 cm; leathery, with sparse hairlike scales abaxially; venation pinnate, indistinct abaxially, slightly raised adaxially, veinlets anastomosing to form 7-9 irregular rows of areoles on each side of midrib. Sori in several irregular rows on each side of midrib; indusia large, ca. 1.5 mm in diam., black at center, toothed on margin, evanescent.

● Limestone crevices in valleys; 600-1000 m. S Guizhou (Libo).

Cyrtomium guizhouense is a sexual diploid.