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

23. Deparia acuta (Ching) Fraser-Jenkins, New Sp. Syndr. Indian Pteridol. 104. 1997.

尖片对囊蕨 jian pian dui nang jue

Rhizomes erect, densely scaly at apex and stipe bases; scales red-brown, oblong, membranous, acuminate at apex. Fronds caespitose; fertile fronds 30-80 cm; stipe pale stramineous, 15-21 cm, 2-2.5 mm in diam., densely scaly at base; scales brown, lanceolate, ca. 1 cm; stipe upward naked; lamina pinnate-pinnatipartite, narrowly elliptic or oblong-lanceolate, 35-45 × 10-15 cm at middle, base narrowed, apex acuminate; pinnae 15-20 pairs, slightly ascending, sessile, separated by narrower space, lower pinnae subopposite, upper pinnae alternate, only few of lower pinnae slightly shortened, basal pinnae 2.5-4 cm, second basal pinnae up to 6 cm; middle pinnae lanceolate, somewhat falcate, 7-9 × 1.5-2 cm at base, 2-3 cm apart, base equilateral, truncate, broader, pinnatipartite into narrow costal wings, apex acuminate; pinna segments 10-17 pairs, subspreading, distant or approximate, oblong, serrulate, subentire, or dentate at margin, obtuse or obtuse-rounded at apex; basal segments larger, ca. 1 cm × 4 mm, upper segments 7-8 mm. Veins visible abaxially, 5-7 pairs per segment, up to 9 pairs in basal segments, simple, oblique. Lamina herbaceous when dried, pale greenish brown, rachis and costae with brown multicellular hairs abaxially, costules with very sparse, short thick hairs on both surfaces, without multicellular hairs at sinus between pinna segments. Sori lunate or shortly linear, 3-5 pairs per segment, up to 6 pairs in basal pinna segments, oblique; indusia similar to sori, brown, firm, entire, persistent. Spores bilateral, perispore surface with rugose folds.

Forests, valleys; 2700-4000 m. Sichuan, Xizang [W Himalaya, N India, N Pakistan].

Fraser-Jenkins (Taxon. Revis. Indian Subcontinental Pteridophytes, 240. 2008) argued that Deparia acuta should be called D. subsimilis (Christ) Fraser-Jenkins (l.c.: 239; Athyrium subsimile Christ, Bull. Soc. Bot. Ital. 1898. 29. 1898) and that A. subsimile is not conspecific with D. giraldii.

1 Pinna segments 10-13 pairs.   23c var. liubaensis
+ Pinna segments 13-17 pairs   (2)
2 (1) Pinna segments distant, serrulate or subentire at margin.   23a var. acuta
+ Pinna segments approximate, dentate at margin.   23b var. bagaensis

Lower Taxa


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