惠水贯众 hui shui guan zhong

Cyrtomium nephrolepioides (Christ) Copeland f. grossum (Christ) Ching.

Plants 25-30 cm tall. Rhizome erect, densely covered with lanceolate brown scales. Stipe stramineous, 8-16 cm, 1-2 mm in diam. at base; lower portion densely scaly; scales brown, sometimes blackish brown at middle, lanceolate or narrowly lanceolate, margins fimbriate. Lamina oblong-lanceolate, 12-22 × 5-8 cm, base not contracted, 1-imparipinnate, apex acute; rachis with sparse linear brown scales. Lateral pinnae 3-5 pairs, alternate, spreading or slightly ascendant, shortly stalked, oblong or broadly ovate, 3.5-4.5 × 2-3 cm, base rounded-truncate, margins entire, apex rounded-obtuse; terminal pinna rhombic-ovate, 4-8 × 2-4 cm; leathery, glabrous on both surfaces, inequilateral at base; venation pinnate, veinlets anastomosing to form 3 rows of areoles on each side of midrib. Sori throughout abaxial surface of pinnae; indusia margins erose. 2n = 164*.

● Limestone crevices in forests; 700-800 m. S Guizhou (Huishui, Libo), S Yunnan (Malipo, Xichou).

Cyrtomium grossum is a sexual tetraploid.