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mountain fern, mountain marsh fern, queen's-veil maiden fern

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

Habitat Terrestrial in open, rocky woods and subalpine meadows in acid soils
Elevation 30–1300 m (100–4300 ft)
Distribution
from FNA
AK; WA; BC; Nfld; e Asia
[WildflowerSearch map]
[BONAP county map]
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
T. augescens, T. dentata, T. grandis, T. hispidula, T. interrupta, T. kunthii, T. nevadensis, T. noveboracensis, T. ovata, T. palustris, T. patens, T. pilosa, T. puberula, T. reptans, T. resinifera, T. reticulata, T. sclerophylla, T. serrata, T. simulata, T. tetragona
Synonyms Dryopteris quelpaertensis, Oreopteris quelpaertensis
Name authority (H. Christ) Ching: Bull. Fan Mem. Inst. Biol. 6: 328. (1936)
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