东亚岩蕨 dong ya yan jue

Woodsia subintermedia Tzvelev; W. taishanensis F. Z. Li & C. K. Ni.

Plants 10-25 cm tall. Rhizomes short, erect or ascending, scaly; scales brown, lanceolate, ca. 3 mm, membranous, margin subentire or sparsely ciliate. Fronds clustered; stipe brown-stramineous or light chestnut, 3-7.5 cm, ca. 1 mm in diam., articulate at top, with curly, long hairs and brown, linear scales later deciduous; lamina 1-pinnate, lanceolate, 8-18 × 2-3.8 cm, papery, both surfaces densely hairy, base slightly attenuate, apex acuminate or acute; rachis with mixture of linear scales and articulate hairs; pinnae 14-20 pairs, sessile, spreading, well separated from each other; lower pairs of pinnae shorter than above, hemielliptic or deltoid-ovate; middle pinnae largest, deltoid-lanceolate, 1-2 cm × 4-10 mm, base broadly cuneate, asymmetrical, acroscopically obviously auriculate, margin undulate or crenate, apex obtuse; upper pinnae connected to each other by wings. Veins obscure, veinlets oblique, 2- or 3-forked, ending with hydathodes and not reaching laminar margin. Sori orbicular, terminal at vein tips, submarginal; indusia cup-shaped, margin ciliate or hairy.

Crevices of shaded rocks in forests; 500-1800 m. Hebei, Heilongjiang, Henan, Jilin, Liaoning, Shandong, Shanxi [Japan, Korea, Russia].