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FOC | Family List | FOC Vol. 2-3 | Athyriaceae | Athyrium

81. Athyrium venulosum Ching, Acta Bot. Boreal.-Occid. Sin. 6(1): 13. 1986.

粗脉蹄盖蕨 cu mai ti gai jue

Rhizomes short, erect, apex clothed with brown, subulate lanceolate scales. Fronds caespitose; fertile fronds 42-60 cm; stipe blackish brown, upward stramineous, shiny, 30-36 cm, ca. 3 mm in diam. at base, base similarly scaly, upward glabrate; lamina 2-pinnate, deltoid-ovate, 22-26 × 21-25 cm at base, base rounded-cuneate, apex abruptly narrowed, shortly acuminate; pinnae ca. 15 pairs, subopposite, ascending, with stalk 2-3 mm, pinnae under abruptly narrowed tip 5 pairs, basal pinnae largest, broadly lanceolate, 11-15 × 3.2-4.6 cm at middle, base equilateral, subtruncate, alongside rachis, pinnate, apex long acuminate; pinnules 16-18 pairs, basal pinnules opposite, upper pinnules alternate, ascending, sessile, several lower pinnae slightly shortened, broadly lanceolate, middle pinnules 1.8-3 cm × 8-12 mm at base, base inequilateral, truncate, somewhat auriculate and parallel to costae on acroscopic side, cuneate on basiscopic side, ± adnate to costae or decurrent and adnate to wing of costa, pinnatipartite, apex shortly acuminate; pinnule segments 4-6 pairs, basal acroscopic segments larger, oblong, up to 7 × ca. 4 mm, margin with small teeth, apex obtuse-rounded; upper segments gradually smaller; second basal and upper 4 pairs of pinnae similar to basal pinnae, but gradually shallowly pinnatilobate; veins visible on both surfaces, protuberant abaxially, pinnate in segments, lateral veins 3-5 pairs, mostly simple, oblique, thick. Lamina thickly papery when dried, yellow-green, glabrate on both surfaces; rachis and costae stramineous, with sparse short hairs abaxially, with subulate spines on adaxial side at base of costa or costule. Sori oblong, only 1 per segment, 2 or 3 in basal acroscopic segments, lateral on basal acroscopic vein; indusia pale brown, oblong, membranous, erose at margin, persistent. Perispore surface without folds.

● Valleys, damp areas, by rocks; 1600-1700 m. NW Hubei (Xingshan).


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