湖北对囊蕨 hu bei dui nang jue

Basionym: Lunathyrium vermiforme Ching, Boufford & K. H. Shing, J. Arnold Arbor. 64: 23. 1983.

Rhizomes erect, short, apex clothed with dark brown, membranous, lanceolate scales. Fronds caespitose; fertile fronds ca. 74 cm; stipe upward dark stramineous, less than 20 cm, ca. 2 mm in diam., base densely scaly, upward gradually glabrate; lamina pinnate-pinnatipartite, oblong-lanceolate, ca. 55 × 18 cm at middle, base gradually narrowed, apex acuminate; pinnae ca. 20 pairs, spreading, separated by narrow space, many lower pinnae gradually shortened, space between pinnae broader than in upper pinnae; basal pinnae auriculate, ca. 1 cm; middle pinnae lanceolate to narrowly lanceolate, somewhat falcate, ca. 10 × 1.6 cm at base, base subtruncate, pinnatipartite, apex acuminate; pinna segments ca. 20 pairs, approximate, oblong, ca. 7 × 4 mm, margin subentire, apex obliquely truncate or obtuse-rounded. Veins visible on both surfaces, pinnate in segments, 4 or 5 pairs, simple. Lamina herbaceous when dried, green, pinnae subglabrate on both surfaces, rachis and costae abaxially with sparse thin, short multicellular hairs. Sori shortly linear, never curved even in distal parts of lamina or pinnae, 3 or 4 pairs per segment; indusia shortly linear, subentire. Spores bilateral, surface with rugate, rugate-saccate, or papillate processes.

● Valleys, damp areas; ca. 1500 m. W Hubei (Lichuan).