Asplenium monanthes |
Asplenium scolopendrium |
|
---|---|---|
single-sorus fern, single-sorus spleenwort |
Hart's-tongue fern |
|
Roots | not proliferous. |
|
Stems | erect, unbranched; scales black with lighter margins, linear-lanceolate, 3–6 × 0.4–0.8 mm, margins entire. |
|
Leaves | monomorphic. |
|
Petiole | reddish brown throughout, lustrous, 1–12(–20) cm, 1/3–1/10 length of blade; indument of black filiform scales. |
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Blade | linear, 1-pinnate throughout, 5–25(–40) × 1–2.5(–3) cm, thick, glabrous; base gradually tapered; apex acute, not rooting. |
|
Pinnae | in 10–40 pairs, oblong to quadrangular, somewhat asymmetric; medial pinnae 4–15 × 2–5 mm; base rounded to cuneate; margins crenulate or ± entire; apex obtuse. |
|
Veins | free, obscure. |
|
Sori | 1(–3) per pinna, only on basiscopic side. |
|
Spores | 32 per sporangium. |
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Rachis | reddish brown throughout, lustrous, glabrous. |
|
n | = 2n = 108 (apogamous). |
|
Asplenium monanthes |
Asplenium scolopendrium |
|
Habitat | Rock | |
Elevation | 50–1000 m (200–3300 ft) | |
Distribution |
AL; AZ; NC; SC; HI; Mexico; Central America; West Indies in Hispaniola; Jamaica; South America to n Argentina; Africa including Madagascar; Madeira; Réunion; Tristan da Cunha
|
AL; MI; NY; TN; ON; Mexico; West Indies in Hispaniola; Europe |
Discussion | Varieties 2 or 3 (1 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 2. | FNA vol. 2. |
Parent taxa | Aspleniaceae > Asplenium | Aspleniaceae > Asplenium |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | A. altajense, Phyllitis scolopendrium | |
Name authority | Linnaeus: Mant. Pl. 1: 130. (1767) | Linnaeus: Sp. Pl. 2: 1079. (1753) |
Web links |