Flora of North America species comparison

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Asplenium monanthes

single-sorus fern, single-sorus spleenwort
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.
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.
Rachis

reddish brown throughout, lustrous, glabrous.
n

= 2n = 108 (apogamous).

Asplenium monanthes
Habitat Rock
Elevation 50–1000 m (200–3300 ft)
Distribution
from FNA
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
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 2.
Parent taxa Aspleniaceae > Asplenium
Sibling taxa
A. abscissum, A. adiantum-nigrum, A. adulterinum, A. auritum, A. bradleyi, A. cristatum, A. dalhousiae, A. ebenoides, A. exiguum, A. heterochroum, A. montanum, A. palmeri, A. pinnatifidum, A. platyneuron, A. plenum, A. pumilum, A. resiliens, A. rhizophyllum, A. ruta-muraria, A. scolopendrium, A. septentrionale, A. serratum, A. trichomanes, A. trichomanes-dentatum, A. trichomanes-ramosum, A. verecundum, A. vespertinum, A. ×biscayneanum, A. ×curtissii, A. ×heteroresiliens
Name authority Linnaeus: Mant. Pl. 1: 130. (1767)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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