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

121. Athyrium atuntzeense (Ching) Z. R. Wang & Z. R. He
[comb. nov.]

阿墩子假冷蕨 a dun zi jia leng jue

Basionym: Pseudocystopteris atuntzeensis Ching, Acta Phytotax. Sin. 9: 83. 1964.

Rhizomes long creeping, ca. 2 mm in diam., blackish brown, sparsely scaly, but densely scaly at apex and stipe bases; scales brown, broadly lanceolate. Fronds distant; fertile fronds 30-55 cm; stipe stramineous, 12-23 cm, 1-2 mm in diam., upper part with very sparse small lanceolate scales; lamina 3-pinnate-pinnatifid, 15-32 cm, nearly as broad as long or slightly narrower, ovate-oblong or broadly ovate-triangular, acuminate with shortly caudate apex; pinnae 8-10 pairs, ascending, lowest pinnae 10-16 × 3-5 cm at middle, oblong-lanceolate, acuminate, base rounded-cuneate, anadromous, acroscopic base often imbricate with rachis, basiscopic base oblique, with stalks 1.5-3 mm, pinnae subopposite or alternate, 2.5-5 cm apart; pinnules ca. 9 pairs, shortly stalked, alternate, subspreading, separate from each other, basal 1 or 2 pairs often slightly shortened, ovate-triangular; middle pinnules oblong, 1.5-3 cm × 7-12 mm, with 2 or 3 thin long teeth, base broadly cuneate, subequilateral or inequilateral, acroscopic base parallel to costae; secondary pinnules ca. 5 pairs, oblique, distant, oblong or rhomboid, 4-7 × 2-3 mm, with 2 or 3 long, acuminate teeth at apex, base broadly cuneate, decurrent and adnate to costular wings, dissected into segments with 2 or 3 acuminate teeth. Veins visible on surfaces, pinnate in ultimate pinnule, terminating into teeth. Lamina herbaceous when dried, pale green and glabrate; rachis and costae pale purplish red adaxially. Sori small, orbicular, suprabasally abaxial on veins near sinuses between segments; indusia pale green, suborbicular-reniform, lacerate with ciliate margin.

● Grassy slopes; 3600-3700 m. NW Yunnan (Dêqên).


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