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.

"[-]30cm" is not declared as a valid unit of measurement for this property.

... more about "Asplenium verecundum"
not rooting +
Round (?) +  and Obtuse (?) +
Warren H. Wagner Jr. +, Robbin C. Moran +  and Charles R. Werth +
Chapman ex L. Underwood +
cuneate +  and tapered +
simple +  and 4-pinnate +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
lanceolate +
thin;1cm;3cm +
0–50 m +
Limestone outcrops in grottoes, on cliffs, and on boulders in shaded woods +
monomorphic +
fertile +  and than sterile ones +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
perforate +, reticulate +, spiny +  and winged +
not articulate +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
brownish black +
1/9 length of blade;1/7 length of blade +
c--shaped +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Bull. Torrey Bot. Club +
blackish brown +
proliferous +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
linear-lanceolate +, linear +  and narrowly triangular +
0.1mm;0.4mm +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
less lunate;linear +
Illustrated +  and Endemic +
dorsiventral +  and symmetric +
Asplenium scalifolium +, Asplenium suare +  and Asplenium subtile +
Asplenium verecundum +
Asplenium +
species +
anastomosing +