Diplazium diplazioides (Klotzsch & H.Karst.) Alston
Descripción
Rhizomes erect; rhizome scales concolorous, dark brown, 5–10 X 1.5–2.5 mm, not retiform, margins denticulate; fronds 100–200 cm long; stipes stramineous, darkened at bases, 45–90 cm X 5–10 mm, 1⁄3–1⁄2 the frond length, with abundant denticulate scales at bases, otherwise glabrous; blades herbaceous to chartaceous, 2-pinnate-pinnatifid to nearly 3-pinnate, to 50 X 45 cm, deltate to ovate, gradually tapering to pinnatifid apices, lacking buds; rachises with scattered tan lanceolate scales on both sides, lacking papillae in the adaxial grooves; pinnae 10–12 pairs, stalked to 25 mm, 15–32 X 7–18 cm, equilateral or nearly so, pinnules sessile to adnate distally, or largest ones on proximal pinnae stalked to 6 mm, equilateral, cut 3⁄4–9⁄10 the distance to costules, costae and costules adaxially with stramineous to tan, interrupted wings perpendicular to the plane of the blades; veins free, pinnate, 4–7 pairs per segment, often 1-forked; indument adaxially absent in rachial and costal grooves (minute papillae absent), abaxially of sparse to numerous brownish to tan hair-like to lanceolate denticulate scales 1–3 mm long on costae, costules, and veins, tissue between veins glabrous; sori pinnately arranged in ultimate segments, with indusia 1–3 mm long, deeply laciniate-ciliate, uncut portions 0.1–0.3 mm wide, cilia 0.5–0.8 mm long.A
Forma de vida
TerrestreA
Ejemplar revisado
Oax (Croat 47938, MO; Mickel 1453, US, 5674, 5675, 5688, 6541, 6605, 6692, UC; Rzedowski 32988, ENCB).A
Elevación
800 – 1900 mA
Tipo de vegetación
Selva alta, Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Diplazium laciniatum, recently described from Oaxaca, is identical to specimens of D. diplazioides from Central America and Venezuela. Another possible synonym is D. croatianum C. D. Adams, type from Panama. We regard Breedlove 15402, cited as D. diplazioides by Adams (in Davidse et al., 1995), as D. altissimum.
Diplazium diplazioides and D. altissimum are distinguishable from the other 2-pinnate-pinnatifid taxa in Mexico by the combination of large, concolorous, dark brown, non-retiform stipe base scales with denticulate margins, the lack of hairs or papillae in the rachial, costal, and costular grooves adaxially, and pinnae that range from equilateral to having the basiscopic basal pinnule without matching acroscopic pinnule. Diplazium diplazioides differs from D. altissimum in having wider, erose indusia (0.8–1 mm) and scales with denticulate margins on the rachises, costae, and costules; similar scales are also found in the rachial and costal grooves adaxially. Another closely related species with toothed rhizome scales and deeply laciniate-ciliate indusia is D. l’herminieri Fée of Guadeloupe. The characters distinguishing D. diplazioides from D. altissimum as given in the key are minor, but consistent; however, biosystematic study is necessary to clarify the relationships of these taxa vis-à-vis other 2-pinnatepinnatifid species.
A
Diplazium diplazioides and D. altissimum are distinguishable from the other 2-pinnate-pinnatifid taxa in Mexico by the combination of large, concolorous, dark brown, non-retiform stipe base scales with denticulate margins, the lack of hairs or papillae in the rachial, costal, and costular grooves adaxially, and pinnae that range from equilateral to having the basiscopic basal pinnule without matching acroscopic pinnule. Diplazium diplazioides differs from D. altissimum in having wider, erose indusia (0.8–1 mm) and scales with denticulate margins on the rachises, costae, and costules; similar scales are also found in the rachial and costal grooves adaxially. Another closely related species with toothed rhizome scales and deeply laciniate-ciliate indusia is D. l’herminieri Fée of Guadeloupe. The characters distinguishing D. diplazioides from D. altissimum as given in the key are minor, but consistent; however, biosystematic study is necessary to clarify the relationships of these taxa vis-à-vis other 2-pinnatepinnatifid species.
A
Bibliografía
C. SEMARNAT 2019: MODIFICACIÓN del Anexo Normativo III, Lista de especies en riesgo de la Norma Oficial Mexicana NOM-059-SEMARNAT-2010: 101 pp. – https://www.dof.gob.mx/nota_detalle.php?codigo=5578808&fecha=14/11/2019#gsc.tab=0 [accessed 2023-05-04 06:16]