Thelypteris simulata

(Davenport) Nieuwland

Amer. Midl. Naturalist 1: 226. 1910.

Common names: Massachusetts fern thélyptère simulatrice
Basionym: Aspidium simulatum Davenport Bot. Gaz. 19: 495. 1894
Synonyms: Parathelypteris simulata (Davenport) Holttum
Treatment appears in FNA Volume 2.

Stems long-creeping, 1.5–3 mm diam. Leaves monomorphic, dying back in winter, often 1 cm or more apart, fertile leaves often somewhat longer than sterile leaves, 25–80 cm. Petiole straw-colored above base, 12–45 cm × 1–3 mm, at base sparsely set with tan, ovate, glabrous scales. Blade lanceolate, 14–35 cm, proximal pinnae largest, or lowest pair slightly smaller, blade tapered gradually to pinnatifid apex. 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. 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. Sori round, medial; indusia tan, often glandular; sporangia glabrous. 2n = 128.

Habitat: Terrestrial in acid soils of shaded swamps and bogs, frequently associated with sphagnum
Elevation: 0–100 m


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N.B., N.S., Ont., Que., Conn., Del., Maine, Md., Mass., N.H., N.J., N.Y., Pa., R.I., Vt., Va., W.Va., Wis.


Selected References


Lower Taxa

... more about "Thelypteris simulata"
Alan R. Smith +
(Davenport) Nieuwland +
Aspidium simulatum +
Massachusetts fern +  and thélyptère simulatrice +
N.B. +, N.S. +, Ont. +, Que. +, Conn. +, Del. +, Maine +, Md. +, Mass. +, N.H. +, N.J. +, N.Y. +, Pa. +, R.I. +, Vt. +, Va. +, W.Va. +  and Wis. +
0–100 m +
Terrestrial in acid soils of shaded swamps and bogs, frequently associated with sphagnum +
Amer. Midl. Naturalist +
Parathelypteris simulata +
Thelypteris simulata +
Thelypteris subg. Parathelypteris +
species +