Thelypteris quelpaertensis |
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mountain fern, mountain marsh fern, queen's-veil maiden fern |
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Stems | short-creeping to suberect, 5–10 mm diam. |
Leaves | monomorphic, dying back in winter, crowded, (15–)25–100 cm. |
Petiole | straw-colored to tan above base, 3–20 cm × 2–5 mm, scales on petioles and rachises tan to straw-colored, persistent, ovate to lanceolate. |
Blade | elliptic, 25–80 cm, 5–10 pairs of proximal pinnae gradually smaller toward base, lowest pinnae ca. 1 cm, blade tapering gradually to pinnatifid apex. |
Pinnae | deeply pinnatifid to ca. 1 mm or less from costa, 3–12 × 1–2 cm; segments linear to oblong, somewhat oblique and often somewhat curved, entire or crenulate, basal segments of proximal pinnae more often crenulate; proximal pair of veins from adjacent segments meeting margin above sinus. |
Sori | round, submarginal; indusia tan, glabrous; sporangia glabrous. |
Indument | abaxially of tan to whitish linear scales along costae, hairs lacking or sparse along costae, blade tissue lacking glands or sparsely glandular. |
2n | = 68. |
Thelypteris quelpaertensis |
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Habitat | Terrestrial in open, rocky woods and subalpine meadows in acid soils |
Elevation | 30–1300 m (100–4300 ft) |
Distribution |
AK; WA; BC; Nfld; e Asia
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Discussion | Although the name Thelypteris limbosperma (Allioni) H. P. Fuchs, type from Europe, has usually been applied to plants in the flora, specimens from western North America match more closely those from eastern Asia; therefore, a name based on a Korean type is used here. The single collection from the coast of Newfoundland (reported by A. Bouchard and S. G. Hay 1976) is remarkably disjunct but matches collections from western North America rather than those of the European species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 2. |
Parent taxa | Thelypteridaceae > Thelypteris > subg. Lastrea |
Sibling taxa | |
Synonyms | Dryopteris quelpaertensis, Oreopteris quelpaertensis |
Name authority | (H. Christ) Ching: Bull. Fan Mem. Inst. Biol. 6: 328. (1936) |
Web links |