Asplenium monanthes |
Asplenium cristatum |
|
---|---|---|
single-sorus fern, single-sorus spleenwort |
hemlock spleenwort, parsley spleenwort |
|
Roots | not proliferous. |
proliferous. |
Stems | erect, unbranched; scales black with lighter margins, linear-lanceolate, 3–6 × 0.4–0.8 mm, margins entire. |
erect, not branched; scales blackish throughout or rarely with narrow pale margins, narrowly linear, mostly only 8–12 cells wide proximally, 2–3 × 0.5–0.8 mm. |
Leaves | monomorphic. |
monomorphic. |
Petiole | reddish brown throughout, lustrous, 1–12(–20) cm, 1/3–1/10 length of blade; indument of black filiform scales. |
blackish to greenish, dull, 1–7(–17) cm, 1/5–1/2 length of blade; glabrous with few scales at base. |
Blade | linear, 1-pinnate throughout, 5–25(–40) × 1–2.5(–3) cm, thick, glabrous; base gradually tapered; apex acute, not rooting. |
oblong-lanceolate, 2–3-pinnate, (2–)6–12(–18) × 2.7–10 cm, thin, glabrous; basal pinna pairs unreduced to reduced 1/4; apex gradually reduced, 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. |
in (7–)10–15(–20) pairs, oblong, 2-pinnate throughout; medial pinnae (1–)2–3(–6) cm, all ± curved upward; proximal pinnae descending; base cuneate; apex attenuate. |
Veins | free, obscure. |
free, evident. |
Sori | 1(–3) per pinna, only on basiscopic side. |
1–4(–6) per pinnule, usually on both basiscopic and acroscopic sides. |
Spores | 32 per sporangium. |
64 per sporangium. |
Rachis | reddish brown throughout, lustrous, glabrous. |
blackish, dull, glabrous. |
n | = 2n = 108 (apogamous). |
|
Pinnules | ± asymmetric, 1–5(–10) × 1–4 mm; margins strongly dentate, cut 1/3–1/2 to axis. |
|
2n | = 72. |
|
Asplenium monanthes |
Asplenium cristatum |
|
Habitat | Rock | Low limestone boulders and ledges in deep moist woods |
Elevation | 50–1000 m [160–3300 ft] | 0–20 m [0–70 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
|
FL; Central America; South America |
Discussion | A widespread tropical American species, Asplenium cristatum is local in west central Florida. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 2. | FNA vol. 2. |
Parent taxa | ||
Sibling taxa | ||
Name authority | Linnaeus: Mant. Pl. 1: 130. (1767) | Lamarck: in Lamarck et al., Encycl. 2: 310. (1786) |
Web links |