Diplazium lonchophyllum Kunze
Descripción
Rhizomes erect; rhizome scales 4–6 X 1–1.5 mm, black, sclerotic, linear-lanceolate, entire; fronds (15–)45–100 cm; stipes green to stramineous, dark at bases, (3–)14–22(–40) cm X 2–3 mm, 1⁄4–2⁄5 the frond length, bases occasionally with black scales; blades chartaceous, mostly pinnate-pinnatifid, 2-pinnate only at bases, (8–)25–50 X (4–)12–20 cm, deltate to ovate-lanceolate, apices pinnatifid, buds absent; rachises glabrous; pinnae stalked (1–)3–8 mm, inequilateral, (8–)15–20 pairs per blade, (2–)8–16 X (1–)2–4(–6) cm, cut 4⁄5 to the costae or more, bases cuneate to subtruncate, basiscopic segments shorter and more oblique than acroscopic ones, an acroscopic lobe free or nearly so on proximal 1–4 pinna pairs, apices long-acuminate, lobes usually ascending, narrowly triangular to deltate, acute and serrulate at tips; veins free, pinnate, 6–9 pairs per segment, mostly 1-forked; indument adaxially absent or of sparse, papillae less than 0.1 mm long in rachial and costal grooves, blades abaxially glabrous except for brownish hair-like scales 1–2 mm long on costae; sori pinnate in segments, 6–10 pairs per segment (sometimes on both veins of a forking veinlet), with tan to brownish ± entire to erose indusia 4–6 X 0.5–1 mm; 2n=82 (Ver), 164 (Chis, Oax).A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 33658, DS). Col (Sanders 10468, CAS, UC). Gro (Hinton 14048, 14210, MO, NY, US). Hgo (Sánchez M. 624, US). Jal (McVaugh 26165, IEB, NY). Méx (Díaz M. 214, ENCB, NY). Mich (Hinton 16258, NY, US). Mor (Pringle 10260, MO, NY, UC). Nay (McVaugh 18980, CAS, IEB, MEXU, NY). NL (Chase 7810, MO). Oax (Hernández G. 301, NY). Qro (Rzedowski 46583, XAL). Tab (Cowan 3162, CAS). Ver (Seaton 305, NY).
Unverified, Doubtful, or Mistaken Reports. SLP (reported by Smith, 1981, and Mickel & Beitel, 1988, but not verified).
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Unverified, Doubtful, or Mistaken Reports. SLP (reported by Smith, 1981, and Mickel & Beitel, 1988, but not verified).
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Elevación
750 – 1550(– 2450) mA
Ecología y Hábitat
On slopes and along streams.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Diplazium lonchophyllum is quite variable and, like D. cristatum and D. drepanolobium (q.v.), in need of monographic study. It differs from those two species by the proximal pinnae each having a distinct, free or nearly free, basal acroscopic pinnule. Diplazium drepanolobium has longer and wider pinnae that are strongly oblique and falcate, longer rhizome scales, and narrower, subentire indusia. Intermediate specimens (Mickel 1619, 6184, NY) have malformed spores, and Mickel 1619 is tetraploid, with 41II and 75I; Mickel et al., 1966); these represent putative hybrids involving D. lonchophyllum as one parent. In Chiapas, Breedlove 21624A, 22293, 22484, and 27480 (DS) are all more or less intermediate between D. drepanolobium and D. lonchophyllum.
Breedlove 33658 (DS), cited as D. prominulum Maxon by Smith (1981) from Chiapas, is D. lonchophyllum. Diplazium lonchophyllum was reported from Nuevo León by Aguirre-Claverán and Arreguín-Sánchez (1988), and a possible specimen is Sánchez 603, MEXU. This specimen varies in the direction of D. franconis.
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Breedlove 33658 (DS), cited as D. prominulum Maxon by Smith (1981) from Chiapas, is D. lonchophyllum. Diplazium lonchophyllum was reported from Nuevo León by Aguirre-Claverán and Arreguín-Sánchez (1988), and a possible specimen is Sánchez 603, MEXU. This specimen varies in the direction of D. franconis.
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