Telmatoblechnum serrulatum (Rich.) Perrie, D.J.Ohlsen & Brownsey
Descripción
Rhizomes creeping or the apices ascending, 5–10 mm diam., lacking stolons; rhizome scales concolorous and dark brown, to somewhat bicolorous with blackish central streaking, lanceolate, 4–8 X 0.3–0.8 mm, margins entire; fronds monomorphic or weakly dimorphic (pinnae of fertile blades slightly narrowed), clumped; stipes (10–)20–40 cm X 3–5 mm, 1⁄4–1⁄2 the frond length, tan, smooth, glabrous; blades chartaceous to subcoriaceous, 50–120 X 10–30 cm, oblong to ovate, bases truncate and lacking vestigial pinnae, subabruptly or abruptly tapered at the conform apices, 1-pinnate, terminal pinna similar in shape to lateral pinnae; rachises tan to stramineous, smooth, glabrous, lacking aerophores at pinna bases; pinnae 25–40 pairs, linearoblong, 5–15 cm X 5–15 mm, sessile or stalked to 2 mm, not adnate, equilateral, articulate (distinct articulate line at bases) and deciduous, apices acute, margins serrulate, not revolute, abaxially with small tan scales 0.5–1 X 0.5–8 mm long on costae, adaxially glabrous; veins simple or 1-forked, vein endings not enlarged or conspicuous, fusing with strongly cartilaginous whitish margins; indusia 0.5 mm wide, entire to erose.A
Forma de vida
TerrestreA
Ejemplar revisado
(Related to the synonym Blechnum serrulatum) Chis (Breedlove 22219, DS, MEXU, NY; Miranda 8497, MEXU). QR (Castillo Rivero 201, XAL; Goldman 625, US). Tab (Cowan 2503, CAS, ENCB, MEXU, NY; Gliessman et al. 1700, ENCB, NY; Matuda 3088, MEXU, US; Rovirosa 433, NY, US. Ver (King 985, ENCB; Lot 1594, ENCB, MEXU, MO, UAMIZ, UC).A
Distribución
Asia PresenteA, Caribe PresenteA, Centroamérica: Belice PresenteA; Costa Rica PresenteA; El Salvador PresenteA; Guatemala PresenteA; Honduras PresenteA; Nicaragua PresenteA; Panamá PresenteA, México (país) Nativo y no endémicoA, Norteamérica al N de México PresenteA, Oceanía PresenteA, Sudamérica PresenteA
Elevación
0 – 900 mA
Ecología y Hábitat
Wet ditches, swamps at low elevations.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
(In relation to the synonym Blechnum serrulatum) This species differs markedly from other Mexican species of Blechnum in its lack of visibly enlarged vein endings (fusing with the cartilaginous margins instead), articulate pinnae, narrowly spaced veins, and relatively widely spaced teeth. The sori are often confined to the distal pinnae. Mickel and Beitel (1988: 89) cited B. serrulatum from Yucatán, perhaps on the basis of Goldman 625, labelled “Plants of Yucatan, Mexico, Puerto Morelos”; however, this locality is in Quintana Roo.
The name Blechnum indicum Burm. f., in recent years considered to apply to Asplenium longissimum Blume, has been recently neotypified by Chambers and Farrant (in McCarthy, 1998: 710) by Coveny 4712 (NSW; isoneotype UC!, among others). With this typification, it is very closely related to B. serrulatum. The differences were discussed by Chambers and Farrant (in McCarthy, 1998: 374). Its range is in Southeast Asia, Australia, and Polynesia.A
The name Blechnum indicum Burm. f., in recent years considered to apply to Asplenium longissimum Blume, has been recently neotypified by Chambers and Farrant (in McCarthy, 1998: 710) by Coveny 4712 (NSW; isoneotype UC!, among others). With this typification, it is very closely related to B. serrulatum. The differences were discussed by Chambers and Farrant (in McCarthy, 1998: 374). Its range is in Southeast Asia, Australia, and Polynesia.A