Difference between revisions of "Asplenium resiliens"
Linnaea 18: 331. 1844.
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Latest revision as of 20:23, 5 November 2020
Roots not proliferous. Stems erect, unbranched; scales black throughout, linear-lanceolate, 4–5 × 0.2–0.6 mm, margins entire. Leaves monomorphic. Petiole black throughout, lustrous, 1.5–3(–5) cm, 1/4–1/10 length of blade; indument of blackish brown, filiform scales. Blade linear to narrowly oblanceolate, 1-pinnate throughout, 9–20(–30) × 1–2(–2.5) cm, thick, glabrous; base gradually tapered; apex acute, not rooting. Rachis black throughout, lustrous, glabrous. Pinnae in 20–40 pairs, oblong; medial pinnae (5–)10–20 × (2–)3–5 mm; base usually with an acroscopic auricle; margins ± entire to shallowly crenate; apex obtuse. Veins free, obscure. Sori 2–5 pairs per pinna, on both basiscopic and acroscopic sides, often confluent with age. Spores 32 per sporangium. n = 2n = 108 (apogamous).
Habitat: Cliffs, sinkholes, on limestone or other basic rocks
Elevation: 100–1500 m
Distribution
Ala., Ariz., Ark., Del., Fla., Ga., Ill., Kans., Ky., La., Md., Miss., Mo., N.Mex., Nev., N.C., Okla., Pa., Tenn., Tex., Utah, Va., W.Va., Mexico, West Indies in Hispaniola, Jamaica, Central America in Guatemala, South America.
Discussion
Asplenium parvulum M. Martens & Galeotti is an older, but illegitimate, name because it is a later homonym of A. parvulum Hooker.
In Florida Asplenium resiliens hybridizes with A. heterochroum Kunze (4 x), producing A. × heteroresiliens (5 x).
Selected References
None.