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FOC | Family List | FOC Vol. 2-3 | Cystopteridaceae | Cystopteris

8. Cystopteris tibetica Z. R. Wang, Acta Phytotax. Sin. 32: 85. 1994.

藏冷蕨 zang leng jue

Rhizomes long creeping, 1.5-2 mm in diam., rhizome and stipe base clothed with brown hairs and few membranous scales. Fronds distant; fertile fronds 15-20 cm; stipe brownish at base, upward stramineous, 6-14 cm, 1-1.5 mm in diam., base clothed with brown hairs and few broadly ovate or ovate-lanceolate scales; lamina 3-pinnate, deltoid-ovate, 6-11 × 3-5 cm, acuminate; pinnae 8-10 pairs, alternate, basal pinnae subopposite, 1.2-3 cm apart from second basal pinnae, ascending, largest, oblong or ovate-lanceolate, 3-5 × 1.2-1.5 cm, base slightly narrowed and inequilateral, with stalk 1.5-3 mm, apex acuminate; upper pinnae lanceolate; pinnules 6-8 pairs, anadromous, alternate, acroscopic one usually slightly shorter than basiscopic one, second basal basiscopic pinnules largest, deltoid-ovate, 6-8 × 4-5 mm, inequilateral at base, acroscopic base parallel to costae, basiscopic base broadly cuneate, very shortly stalked, toothed, apex obtuse; secondary pinnules or pinnule segments ca. 3 pairs, basal acroscopic largest, ovate, oblong, or obovate, 2-3 × 1.5-2 cm, base cuneate and adnate to costular wing or partly separate, serrate, apex obtuse; upper segments rhomboid or shortly linear, only acroscopic side and apices toothed; veins visible on surfaces, pinnate, terminating in emarginations. Fronds thinly herbaceous when dried, green, clothed with short glandular hairs on both surfaces. Sori small, orbicular, 1 or 2 sori per ultimate segment, abaxial on suprabasal veins; indusia pale brown, orbicular or shallowly cupular, frequently with few glands, covering sporangia when young, hidden at maturity.

● Alpine slopes, damp areas in coniferous forests, streamsides, on rocks and tree trunks; 2400-3600 m. Xizang, Yunnan.

Cystopteris tibetica is similar to C. moupinensis, but the lamina has short glandular hairs on both surfaces and the indusia also has short glandular hairs.


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