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FOC | Family List | FOC Vol. 2-3 | Thelypteridaceae | Oreopteris

2. Oreopteris elwesii (Hooker & Baker) Holttum in Nayar & Kaur, Companion Handb. Ferns Brit. India. 204. 1974.

锡金假鳞毛蕨 xi jin jia lin mao jue

Nephrodium elwesii Hooker & Baker, Syn. Fil., ed. 2, 497. 1874; Dryopteris elwesii (Hooker & Baker) Kuntze; Lastrea elwesii (Hooker & Baker) Beddome; Thelypteris elwesii (Hooker & Baker) Ching.

Plants 35-45 cm tall. Rhizomes creeping including stipe bases covered with brown ovate thin scales. Fronds sparse; stipes 30-32 cm, blackish brown proximally, upward to rachises bright brownish stramineous, subglabrous abaxially, along grooves pubescent adaxially; laminae oblanceolate, 30-32 × 5-7 cm, gradually tapering to bases, pinnate-pinnatifid, acuminate at apices; pinnae ca. 10 pairs, gradually reduced from middle of lamina downward, opposite or alternate, proximal pair of pinnae orbicular-auriculate, 5-8 × 5-8 mm, middle ones alternate, spreading or slightly ascending, 3-4.5 cm, to 1 cm wide, pinnatifid to 2/3 of distance to costae; segments ca. 5 × 4 mm (basal acroscopic part minutely longer), ligulate, rounded-obtuse at apices. Veinlets impressed adaxially, abaxial sides minutely raised, veinlets simple or forked, 3 or 4 pairs per segment, all reaching margins above sinuses. Laminae papery, brownish green when dry adaxially, grayish green abaxially, glabrous on both surfaces, with more orange-yellow glands abaxially. Sori attached on ends of single veinlet or acroscopic veinlet on forked veins; indusia membranous, brown, glabrous, persistent.

Streamsides in subalpine coniferous forests; ca. 3100 m. Yunnan [India (Sikkim)].


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