Thelypteris noveboracensis |
Thelypteris subg. Parathelypteris |
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fougère de New York, New York fern, thélyptéride de New York |
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Stems | usually long-creeping, 1.5–2.5 mm diam. |
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Leaves | monomorphic, dying back in winter, mostly evenly spaced 1 cm or more (sun-gathering leaves in loose cluster), (25–)40–85 cm. |
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Petiole | straw-colored, 4–25 cm × 1–3 mm, at base with scales tan to reddish brown, ovate, glabrous. |
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Blade | elliptic, 15–60 cm, proximal 4–10 pinna pairs gradually smaller toward base (smallest often less than 5 mm), blade tapering gradually to pinnatifid apex. |
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Pinnae | deeply pinnatifid to within 1 mm of costa, 3–9(–13) × 1–2(–2.5) cm; segments oblong to linear, somewhat oblique, entire to crenulate; proximal pair of veins from adjacent segments meeting margin above sinus. |
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Sori | round, supramedial; indusia tan, often ciliate; sporangia glabrous. |
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Indument | abaxially of moderately to densely set hairs to 1 mm on rachises, costae, and veins, glands lacking or yellowish to light orangish, mostly sessile on blade tissue; blades adaxially often with hairs on veins. |
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Distinguished | from other subgenera by the combination of seasonal leaves, narrow, long-creeping stems 1–3 mm diam., pinnate-pinnatifid blades with generally greatly reduced proximal pinnae (except Thelypteris simulata), and veins meeting margin above the sinuses. |
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x | = 27, 32. |
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2n | = 54. |
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Thelypteris noveboracensis |
Thelypteris subg. Parathelypteris |
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Habitat | Terrestrial in moist woods, especially near swamps, streams, and in vernal seeps of ravines, often in slightly disturbed secondary forests, frequently forming large colonies | |
Elevation | 0–1100 m (0–3600 ft) | |
Distribution |
AL; AR; CT; DC; DE; GA; IL; IN; KY; LA; MA; MD; ME; MI; MS; NC; NH; NJ; NY; OH; OK; PA; RI; SC; TN; VA; VT; WV; NB; NF; NS; ON; PE; QC; SPM
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Discussion | Species 1–3 are included in Parathelypteris by some workers (e.g., R. E. Holttum 1976). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 2. | FNA vol. 2. |
Parent taxa | Thelypteridaceae > Thelypteris > subg. Parathelypteris | Thelypteridaceae > Thelypteris |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Polypodium noveboracense, Dryopteris noveboracensis, Parathelypteris noveboracensis, T. thelypterioides | T. section Parathelypteris, subg. Parathelypteris |
Name authority | (Linnaeus) Nieuwland: Amer. Midl. Naturalist 1: 225. (1910) | (H. Itô) R. M. Tryon & A. F. Tryon: Rhodora 84: 128. (1982) |
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