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

14. Deparia pycnosora (Christ) M. Kato, Bot. Mag. (Tokyo). 90: 36. 1977.

东北对囊蕨 dong bei dui nang jue

Rhizomes stout, ascending or shortly creeping, densely clothed with brownish, membranous, broadly ovate or ovate-lanceolate large scales at apex and stipe bases. Fronds caespitose; fertile fronds (30-)40-70(-87) cm; stipe chestnut-black at base, upward gradually stramineous, occasionally reddish chestnut, 8-20(-31) cm, upward with sparse, brown, membranous, lanceolate scales; lamina pinnate, broadly lanceolate to oblong-lanceolate, (24-)30-40(-59) × (5-)8-12(-18) cm, apex acuminate; pinnae pinnatipartite, 18-25 pairs, only few lower pairs gradually shortened; basal pinnae usually more than 2.5 cm, rarely shorter; middle pinnae narrowly lanceolate, (2.5-)4-5(-9) × 0.7-2.5 cm, base subtruncate, apex acuminate; lower pinnae subopposite, upward pinnae alternate, spreading, 1-3 cm apart, pinnatipartite near to costae; pinna lobes (7-)12-15(-19) pairs, contiguous, oblong, 4-10 × 2-3 mm, margin entire or ± crenate, apex rounded or obtuse and crenate. Veins visible on both surfaces, pinnate, ca. 5 pairs, simple or forked. Lamina herbaceous when dried, green, with sparse multicellular short hairs along rachis, costae, midribs, and veins. Sori narrowly lunate to linear, 3-5 pairs per lobe, almost from midrib to lamina margin, 1-1.5 mm, often dense at maturity; indusia similar to sori, pale brown, persistent. Spores bilateral, perispore surface with few low folds. 2n = 80, 160.

Damp places in mixed forests; 200-1000 m. Hebei, Heilongjiang, Jilin, Liaoning, Shandong [N Japan, Korea, E Russia].

Deparia pycnosora is similar to the North American Lunathyrium acrostichoides (Swartz) Ching in the ascending to shortly creeping rhizome, multicellular short hairs borne at sinuses between pinna lobes, and spore surface with low folds. The two may be vicariants in E Asia and North America.

1 Pinnae 0.7-1.5 cm wide, pinna lobes 4-6(-10) mm; veins simple.   14a var. pycnosora
+ Pinnae 2-2.5 cm wide, pinna lobes ca. 10 mm; veins usually forked.   14b var. longidens

Lower Taxa


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