亚洲假鳞毛蕨 ya zhou jia lin mao jue

Dryopteris quelpaertensis Christ, Bull. Acad. Int. Géogr. Bot. 20: 7. 1910 ["quelpartensis"]; Athyrium quelpaertensis (Christ) Ching; Ctenitis quelpaertensis (Christ) H. Itô; C. quelpaertensis var. yakumontana (Masamune) H. Itô; D. christiana Kodama ex Koidzumi; D. kamtschatica Komarov; D. oreopteris (Ehrhart) Maxon var. fauriei (Christ) Miyabe & Kudô; D. yakumontana Masamune; Lastrea quelpaertensis (Christ) Copeland; L. quelpaertensis var. yakumontana (Masamune) Tagawa; Nephrodium montanum Baker var. fauriei Christ; Thelypteris quelpaertensis (Christ) Ching; T. quelpaertensis var. yakumontana (Masamune) Tagawa.

Plants (40-)70-105 cm tall. Rhizomes short, erect or ascending, densely covered with scales; scales bright brown, ovate-oblong-lanceolate, entire along margins, acuminate and with small club-shaped glands at apices. Fronds clustered; stipes 10-30 cm, bases dark brown, distally dark stramineous, including rachises covered with denser scales; scales bright brown or brownish, ovate, lanceolate, or linear, glandular at apices; laminae oblong-oblanceolate, (13-)50-70 × (10-)20-30 cm, gradually tapering to bases, pinnate-pinnatifid, long acuminate and pinnatifid at apices; pinnae 20-35 pairs, opposite or alternate distally, proximal 3 or 4 pairs gradually shortened, proximal pair of pinnae triangular-lanceolate; middle pinnae (5-)10-15 × 1-2.5 cm, bases truncate, pinnatifid nearly to costae, apices long acuminate; segments usually longest at pinna bases, triangular-oblong, entire or shallowly undulate and usually recurved along margins, rounded-obtuse at apices. Veinlets free, simple or forked above middle and reaching margins. Laminae herbaceous, grayish green, covered with brownish linear scales and mixed grayish white pubescence, elsewhere glabrous. Sori orbicular, attached above middle of veinlets and close to margins; indusia orbicular-reniform, brown, membranous, usually with glandular projections along margins. Spores finely granular. 2n = 68.

Forests; 1000-1800 m. Jilin (Changbai Shan) [N and S Japan, Korea, Russia (Far East)].

The outline of Lastrea quelpaertensis is similar to L. limbosperma (Allioni) Ching, which is distributed in SW Asia, Europe, and North America, but differs by pinnae abaxially without glands, costae glabrous above the middle abaxially, and laminae slightly thickened.