Flora of North America species comparison

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Asplenium palmeri

Palmer's spleenwort
Roots

not proliferous.
Stems

short-creeping, unbranched;

scales black with lighter margins, linear-lanceolate, 1.5–3 × 0.1–0.4 mm, margins entire.
Leaves

monomorphic.
Petiole

purplish black, lustrous, 0.5–3 cm, 1/3–1/20 length of blade;

indument of black filiform scales at base.
Blade

linear, 1-pinnate throughout, 7–17.5 × 0.9–1.8 cm, thick, glabrous;

base gradually reduced;

apex gradually reduced to whiplike rooting tip.
Pinnae

in (12–)20–40 pairs, oblong;

medial pinnae 6–9 × 3–4 mm;

base broadly cuneate or auriculate;

margins crenate-serrate;

apex obtuse.
Veins

free, obscure.
Sori

3–7 pairs per pinna, on both basiscopic and acroscopic sides.
Spores

64 per sporangium.
Rachis

purplish black throughout, lustrous, glabrous or nearly so.

Asplenium palmeri
Habitat Shaded rocky slopes, wet ledges, often in protected places
Elevation 900–2000(–2750) m (3000–6600(–9000) ft)
Distribution
from FNA
AZ; NM; TX; Mexico; Central America in Guatemala; Belize
[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. monanthes, A. montanum, 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 Maxon: Contr. U.S. Natl. Herb. 13: 39. (1909)
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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