Asplenium abscissum Willd.
Descripción
Roots fibrous, not proliferous; rhizomes erect; rhizome scales dark brown, subclathrate, lumina ± occluded, ovate-lanceolate, ca. 1.5–2.5 X 0.8 mm, entire; fronds clumped, (5–)10–40(–50) cm long; stipes green to brownish, dull, (2–)5–25 cm X 0.5–2 mm, 1⁄3–1⁄2 of frond length, glabrescent or with a few hair-like scales, adaxially with narrow green wings on shoulders for much of their length; blades chartaceous, deltate, 1-pinnate, (3–)8–25 X (1.5–) 4–16 cm, broadest at the bases or nearly so, apices confluent, pinnatifid, nonproliferous; rachises greenish to yellowish or brownish, dull, with sparse hair-like scales, adaxially with green lateral wings 0.5 mm wide; pinnae linear-lanceolate, (3–)5–9(–12) pairs, (1–)3–9 X 0.5–1.8 cm, sessile or largest stalked to 1 mm, not articulate, excavate at basiscopic bases, truncate acroscopically, margins irregularly obtuse to commonly acute or attenuate at apices, margins biserrate or bicrenate, sinuses to ca. 2.5 mm deep; veins mostly 1- or 2-forked, ± evident on both sides of blades, tips prominent adaxially; indument abaxially of scattered, tan, appressed, clavate hairs 0.1–0.2 mm long; sori (2–)5–14 pairs per pinna, at ca. 30–45° from costae; indusia 3–6 X 0.4–0.8 mm, margins entire; spores reniform; 2n=72 (Fla, Jam, Trin), 144 (Oax), 288 (PR).A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 22475, DS, NY, 57998, CAS). Hgo (Kenoyer s.n., ARIZ). Jal (McVaugh 14230, MEXU, US). Mor (Hinton 17091, ENCB, NY). Nay (Jones 23478, UCp.p.). Oax (Mickel 6382, MEXU, NY, UC). Tab (Cowan 3157, CAS, ENCB, NY). Ver (Purpus 6450, UC, US; Wendt et al. 3472, CHAPA, NY).
Unverified, Doubtful, or Mistaken Reports. SLP (reported by Mickel & Beitel, 1988, but not verified).
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Unverified, Doubtful, or Mistaken Reports. SLP (reported by Mickel & Beitel, 1988, but not verified).
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Elevación
100–2050 mA
Ecología y Hábitat
Sometimes on logs, in wet forests.A
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Asplenium abscissum is easily confused with A. delitescens, but the former is distinct in its erect rhizomes, entire rhizome scales, winged rachises, fewer (5–14 pairs) sori per pinna, and shorter (3–6 mm) indusia. In all likelihood the species as broadly construed here is a complex, as suggested by the different ploidy levels known. Hybrids with A. verecundum Chapman ex Underw. are known in Florida.
Wendt et al. 3472, from Veracruz, and several specimens from Chiapas (e.g., Breedlove 22251, 22508, DS) have precociously fertile fronds less than ca. 8 _ 2 cm and blades with 3 or 4 pinna pairs. Similar specimens are often annotated as A. pulchellum or A. virillae in herbaria, and the latter is construed by Adams (in Davidse et al., 1995) more broadly, to include very small plants of what we identify as A. abscissum (e.g., Breedlove 22475, 33105, DS). Adams distinguished A. virillae from A. abscissum by the latter lacking green-winged rachises, but this character does not always seem reliable or consistent. In general, blades of A. abscissum have more rhombic, acute-tipped pinnae than in A. virillae, and the blades dry a lighter, yellow-green (vs. dark green), but the two species are closely related and may be merely ecotypes (A. abscissum on soil, A. virillae on rocks) of the same taxon.
The lectotype of A. abscissum has been erroneously said to be from Caracas, Venezuela, by Morton and Lellinger (1966), Proctor (1977, 1989), and Adams (in Davidse et al., 1995). The type and presumed isotypes (19893-2, 19893-3) in the Willdenow herbarium clearly state “Habitat in India occidentale,” and sheet 19893-3 is labeled “Porto rico.”
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Wendt et al. 3472, from Veracruz, and several specimens from Chiapas (e.g., Breedlove 22251, 22508, DS) have precociously fertile fronds less than ca. 8 _ 2 cm and blades with 3 or 4 pinna pairs. Similar specimens are often annotated as A. pulchellum or A. virillae in herbaria, and the latter is construed by Adams (in Davidse et al., 1995) more broadly, to include very small plants of what we identify as A. abscissum (e.g., Breedlove 22475, 33105, DS). Adams distinguished A. virillae from A. abscissum by the latter lacking green-winged rachises, but this character does not always seem reliable or consistent. In general, blades of A. abscissum have more rhombic, acute-tipped pinnae than in A. virillae, and the blades dry a lighter, yellow-green (vs. dark green), but the two species are closely related and may be merely ecotypes (A. abscissum on soil, A. virillae on rocks) of the same taxon.
The lectotype of A. abscissum has been erroneously said to be from Caracas, Venezuela, by Morton and Lellinger (1966), Proctor (1977, 1989), and Adams (in Davidse et al., 1995). The type and presumed isotypes (19893-2, 19893-3) in the Willdenow herbarium clearly state “Habitat in India occidentale,” and sheet 19893-3 is labeled “Porto rico.”
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