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Overview

Distribution

Tex.; Mexico; West Indies in Hispaniola; Central America; South America.
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© Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA

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Physical Description

Morphology

Description

Stems creeping, horizontal, slender, 2--5 mm diam.; scales mostly bicolored, lanceolate, largest scales 0.3--0.8 mm wide, centers black, thick, margins brown, thin, erose-dentate. Leaves monomorphic, clustered or scattered along stem, 15--100 cm; croziers pubescent, bearing a few scales. Petiole straw-colored, tan, or gray, not lustrous, rounded or slightly flattened adaxially, without prominent articulation lines. Blade elongate-deltate, usually 3-pinnate proximally, 5--25 cm wide; rachis tan throughout, strongly flexuous, rounded or flattened adaxially, usually glabrous. Pinnae retrorse, projecting downward toward base of leaf, not decurrent on rachis, with 5--40 ultimate segments; costae strongly flexuous, 25--120 mm, longer than ultimate segments. Ultimate segments lanceolate-deltate, 5--20 mm, leathery, glabrous or sparsely pubescent; margins recurved on fertile segments, covering less than 1/2 abaxial surface, borders whitish, entire; apex obtuse to truncate. Veins of ultimate segments obscure. Sporangia short-stalked, containing 64 spores, not intermixed with farina-producing glands. 2 n = 58.
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Ecology

Habitat

Comments: On dry ledges and talus slopes of limestone, calcareous rocks or granite, or at the base of cliffs and in rich soil in open rocky woodlands, up to 5,200' (Correll and Brewster, 1970).

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Sporulating summer--fall. Rocky slopes and ledges, leaves often supported by associated vegetation, on a variety of substrates including granite and limestone; 300--1700m.
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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G4 - Apparently Secure

Reasons: Not infrequent in Texas, found especially along the Edwards Plateau. Not known from New Mexico or Arizona, but reportedly extends through eastern Mexico.

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Notes

Comments

Populations of Pellaea ovata in the flora are composed of sexual diploids; an apogamous triploid cytotype predominates south of the United States. I have not seen herbarium specimens to substantiate reports of P . ovata from New Mexico (D. B. Lellinger 1985).
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