华北鳞毛蕨 hua bei lin mao jue

Aspidium goeringianum Kuntze, Bot. Zeitung (Berlin) 6: 557. 1848; Dryopteris laeta (Komarov) C. Christensen; D. laeta var. alpina Ching; D. laeta var. oblongifrons Kitagawa; D. oxyodon (Franchet) Kitagawa var. oblongifrons (Kitagawa) Kitagawa; Nephrodium laetum Komarov.

Plants 50-90 cm tall. Rhizome creeping, stout. Fronds approximate; stipe pale brown, 25-50 cm, longitudinally grooved, scaly; scales pale brown, broadly lanceolate to linear, up to 1.5 cm, membranous, remotely serrate, rachis throughout clothed with linear or acicular scales; lamina ovate-oblong or deltoid-ovate, 25-50 × 15-40 cm, tripinnatipartite, apex acuminate; pinnae alternate, lanceolate or oblong-lanceolate, shortly stalked, apex long acuminate, middle and lower pinnae longer, 11-27 × 2.5-6 cm, slightly narrowed toward base; pinnules approximate, basal basiscopic ones shortened, lanceolate or oblong-lanceolate, apex acute; segments oblong, 1-3 mm wide, often serrate at apex, sometimes also on margin. Lamina herbaceous to thinly papery, with acicular scales abaxially on costa and costule; veins pinnate, forked. Sori in 2 rows on each side of costa of pinnule; indusia orbicular-reniform, membranous, margin eroded.

Broad-leaved forests, thickets. Gansu, Hebei, Henan, Liaoning, Nei Mongol, Shaanxi, Shanxi, Sichuan, Xinjiang [Japan, Korea, Russia].

The following names, Dryopteris filix-mas subsp. oxyodon (Franchet) C. Christensen (Index Filic. 266. 1905; Aspidium oxyodon Franchet, Nouv. Arch. Mus. Hist. Nat., sér. 2, 7: 163-164. 1884, types from Hebei and Mongolia; D. oxyodon (Franchet) Kitagawa (1935), not (Baker) C. Christensen (1905)), D. sublaeta Ching & Y. P. Hsu (Fl. Tsinling. 2: 227. 1974, described from Henan), and D. subramosa Christ (Notul. Syst. (Paris) 1: 42. 1909, described from Shaanxi) were synonymized with D. goeringiana by Fraser-Jenkins (Bull. Brit. Mus. (Nat. Hist.), Bot. 14: 211, 212. 1986).