Asplenium verecundum

Chapman ex L. Underwood

Bull. Torrey Bot. Club 33: 193. 1906

IllustratedEndemic
Synonyms: Asplenium scalifolium E. P. St. John Asplenium suare E. P. St. John Asplenium subtile E. P. St. John.
Treatment appears in FNA Volume 2.

Roots proliferous. Stems erect, unbranched; scales blackish throughout, linear to narrowly triangular, 0.9–1.3 × 0.1–0.4 mm, margins entire. Leaves monomorphic. Petiole brownish black, 0.5–3(–5) cm, 1/9–1/7 length of blade; indument of blackish, linear-lanceolate scales at base. Blade narrowly lanceolate, 2–3-pinnate, (4–)10–20(–)30 × 1–3(–5) cm, thin, glabrous; base tapered somewhat; apex formed by gradual reduction, not rooting. Rachis blackish brown, dull, essentially glabrous. Pinnae in (8–)12–16(–22) pairs, oblong; medial pinnae 0.5–2.5 × 3–10 mm; base cuneate; apex obtuse. Pinnules of 1–5 segments; segments oblanceolate, 2–3 × 1–2 mm, entire; apex mostly round. Veins free, evident, 1 per segment. Sori 1 per segment. Spores 64 per sporangium. 2n = 144.


Habitat: Limestone outcrops in grottoes, on cliffs, and on boulders in shaded woods
Elevation: 0–50 m

Discussion

This delicate spleenwort, Asplenium verecundum, occurs in both southern and central peninsular Florida where it is very local. Sterile hybrids are known to result from crossing with A. trichomanes-dentatum (A. × biscayneanum) and A. abscissum (A. × curtissii).

Asplenium verecundum may be a variety or cytotype of the similar A. myriophyllum (Swartz) C. Presl of the West Indies (D. B. Lellinger 1985).

Selected References

None.

Lower Taxa

None.

... more about "Asplenium verecundum"
Warren H. Wagner Jr. +, Robbin C. Moran +  and Charles R. Werth +
Chapman ex L. Underwood +
0–50 m +
Limestone outcrops in grottoes, on cliffs, and on boulders in shaded woods +
Bull. Torrey Bot. Club +
Illustrated +  and Endemic +
Asplenium scalifolium +, Asplenium suare +  and Asplenium subtile +
Asplenium verecundum +
Asplenium +
species +