Thelypteris simulata |
Thelypteris palustris |
|
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bog fern, Massachusetts fern, thélyptère simulatrice |
eastern marsh fern, marsh fern, meadow fern, thélyptère des marais |
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Stems | long-creeping, 1.5–3 mm diam. |
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Leaves | monomorphic, dying back in winter, often 1 cm or more apart, fertile leaves often somewhat longer than sterile leaves, 25–80 cm. |
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Petiole | straw-colored above base, 12–45 cm × 1–3 mm, at base sparsely set with tan, ovate, glabrous scales. |
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Blade | lanceolate, 14–35 cm, proximal pinnae largest, or lowest pair slightly smaller, blade tapered gradually to pinnatifid apex. |
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Pinnae | deeply pinnatifid to ca. 1 mm from costa, 3–10 × 1–2 cm; segments oblong, somewhat oblique, entire; proximal pair of veins from adjacent segments meeting margin above sinus. |
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Sori | round, medial; indusia tan, often glandular; sporangia glabrous. |
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Indument | abaxially of sparsely set hairs 0.2–0.4 mm primarily on costae, also of yellowish short-stalked glands less than 0.1 mm, blade tissue with numerous reddish to orangish, resinous, shiny, sessile, hemispheric glands; blades adaxially with scattered hairs on veins. |
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2n | = 128. |
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Thelypteris simulata |
Thelypteris palustris |
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Habitat | Terrestrial in acid soils of shaded swamps and bogs, frequently associated with sphagnum | |
Elevation | 0–100 m (0–300 ft) | |
Distribution |
CT; DE; MA; MD; ME; NH; NJ; NY; PA; RI; VA; VT; WI; WV; NB; NS; ON; QC
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AL; AR; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; ND; NE; NH; NJ; NY; OH; OK; PA; RI; SC; SD; TN; TX; VA; VT; WI; WV; MB; NB; NF; NS; ON; PE; QC; Europe; Asia
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Discussion | The name Thelypteris thelypterioides (Michaux) Holub has been applied to T. palustris, but A. F. Tryon et al. (1980) have shown that this was a result of an incorrect typification by C. V. Morton (1967). Thelypteris palustris var. palustris occurs in Eurasia. Varieties 2 (1 in the flora). (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 > subg. Thelypteris |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Aspidium simulatum, Parathelypteris simulata | Acrostichum thelypteris, Dryopteris thelypteris |
Name authority | (Davenport) Nieuwland: Amer. Midl. Naturalist 1: 226. (1910) | Schott: Gen. Fil. plate 10. (1834) |
Web links |