Pleopeltis thyssanolepis (A.Braun ex Klotzsch) E.G.Andrews & Windham
Descripción
Rhizomes slender, creeping, 3–5 mm diam.; rhizome scales linear-lanceolate, appressed, imbricate, bicolorous, light brown with central black sclerotic streak, 3–4 X 0.8–1 mm, margins fringed; fronds (3.5–)10–40 (–50) cm long, distant; stipes ca. 1⁄2–2⁄3 the frond length, densely scaly with round (0.3–0.5 mm diam.) to lanceolate (1.5–2 mm long) scales; blades ovate to deltatelanceolate, pinnatifid, 3–10(–18) cm wide, with apices pinnatifid; pinnae (1–)3–15 pairs, 5–7 mm wide, entire, obtuse; nectaries on acroscopic surcurrent pinna bases; adaxial surfaces glabrous to sparsely scaly with acicular fimbriate scales; abaxial surfaces densely scaly, the scales mixed, round (0.5 mm diam.) to lanceolate (1–1.5 mm long), dark brown-centered, margins pale and ciliate-denticulate; veins partially netted, obscure, hydathodes prominent with white deposits; sori round to slightly oblong, in a single row on each side of the costae, mostly hidden by the scales; sporangia glabrous; 2n=74 (Sin, Peru), 2n=ca. 148 (Jam).
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Forma de vida
o epipétrica. TerrestreA
Ejemplar revisado
(Related to the synonym Polypodium thyssanolepis) Ags (McVaugh 18388, MICH). Chih (Pringle 977, NY). Chis (Breedlove 26837, NY). Coah (Johnston et al. 11506C, LL). Col (Jones 506, US). DF (Rusby 372, NY). Dgo (Reveal 2730, NY). Gro (Mayfield et al. 1012, UC). Gto (Rzedowski 40583, IEB). Hgo (Dunn & Dunn 19019, NY). Jal (Rzedowski 26214, NY). Méx (Rzedowski 24308, NY). Mich (Leavenworth 326, NY). Mor (Lyonnet 857, MEXU, NY). Nay (Mexia 768, NY). NL (Lavin 4861, NY). Oax (Mickel 3901, NY). Pue (Nicolas s.n., 3 Nov 1909, NY). Qro (Rzedowski 46626, IEB). Sin (Breedlove 18502, NY). SLP (Pringle 3388, NY). Ver (Bourgeau 2700, NY). Zac (McVaugh 17762, NY).A
Elevación
850 – 3000 mA
Ecología y Hábitat
On rocky slopes in mesic to dryish areas, open woods or clearingsA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
(In relation to the synonym) Polypodium thyssanolepis is distinct from members of the P. squamatum complex (de la Sota, 1966) by the presence of hydathodes on the blades and a black central portion of the rhizome scales.
Specimens range from large (e.g., Hallberg 1773, NY, from Oaxaca, 50 X 18 cm) to very small in the northern part of the range (e.g., Reveal 2730, ARIZ, from Durango, 3.5 X 1.5 cm, only 1 or 2 pinna pairs).A
Specimens range from large (e.g., Hallberg 1773, NY, from Oaxaca, 50 X 18 cm) to very small in the northern part of the range (e.g., Reveal 2730, ARIZ, from Durango, 3.5 X 1.5 cm, only 1 or 2 pinna pairs).A