Asplenium trichomanes |
Asplenium palmeri |
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doradille chevelue, maidenhair spleenwort |
Palmer's spleenwort |
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Roots | not proliferous. |
not proliferous. |
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Stems | short-creeping, often branched; scales black throughout or with brown borders, lanceolate, 2–5 × 0.2–0.5 mm, margins entire to denticulate. |
short-creeping, unbranched; scales black with lighter margins, linear-lanceolate, 1.5–3 × 0.1–0.4 mm, margins entire. |
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Leaves | monomorphic. |
monomorphic. |
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Petiole | reddish brown or blackish brown throughout, lustrous, 1–4(–7) cm, 1/6–1/4 length of blade; indument absent or of black, linear-lanceolate or filiform scales at base. |
purplish black, lustrous, 0.5–3 cm, 1/3–1/20 length of blade; indument of black filiform scales at base. |
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Blade | linear, 1-pinnate, 3–22 × 0.5–1.5 cm, thin, glabrous or sparsely pubescent; base gradually tapered; apex narrowly acute, not rooting. |
linear, 1-pinnate throughout, 7–17.5 × 0.9–1.8 cm, thick, glabrous; base gradually reduced; apex gradually reduced to whiplike rooting tip. |
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Pinnae | in 15–35 pairs, oblong to oval; medial pinnae 2.5–8 × 2.5–4 mm; base broadly cuneate, with or without low, rounded acroscopic auricle; margins shallowly crenate to serrate or ± entire; apex obtuse. |
in (12–)20–40 pairs, oblong; medial pinnae 6–9 × 3–4 mm; base broadly cuneate or auriculate; margins crenate-serrate; apex obtuse. |
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Veins | free, evident. |
free, obscure. |
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Sori | 2–4 pairs per pinna, on both basiscopic and acroscopic sides. |
3–7 pairs per pinna, on both basiscopic and acroscopic sides. |
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Spores | 64 per sporangium. |
64 per sporangium. |
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Rachis | reddish brown throughout, lustrous, glabrous or nearly so. |
purplish black throughout, lustrous, glabrous or nearly so. |
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2n | = 72, 144. |
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Asplenium trichomanes |
Asplenium palmeri |
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Habitat | Shaded rocky slopes, wet ledges, often in protected places | |||||
Elevation | 900–2000(–2750) m (3000–6600(–9000) ft) | |||||
Distribution |
AK; AL; AR; AZ; CA; CO; CT; DE; GA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; NC; NE; NH; NJ; NM; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; VA; VT; WA; WI; WV; WY; BC; NB; NF; NS; ON; QC; Worldwide
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AZ; NM; TX; Mexico; Central America in Guatemala; Belize
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Discussion | In North America, as in Europe, Asplenium trichomanes consists of diploid and tetraploid cytotypes, treated here as subspecies. Asplenium trichomanes subsp. trichomanes, the diploid, is found on noncalcareous rocks. In the southwestern United States it occurs at high elevations. Asplenium trichomanes subsp. quadrivalens, the tetraploid, grows on calcareous substrates and has a more northern distribution (R. C. Moran 1982). Triploid hybrids are known between the diploids and tetraploids (R. C. Moran 1982; W. H. Wagner Jr. and F. S. Wagner 1966). Subspecies 4 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 2. | FNA vol. 2. | ||||
Parent taxa | Aspleniaceae > Asplenium | Aspleniaceae > Asplenium | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Linnaeus: Sp. Pl. 2: 1080. (1753) | Maxon: Contr. U.S. Natl. Herb. 13: 39. (1909) | ||||
Web links |
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