Pleopeltis thyssanolepis (A.Braun ex Klotzsch) E.G.Andrews & Windham

Primary tabs

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).

A

Forma de crecimiento

Hierba

Forma de vida

o epipétrica. TerrestreA

Nutrición

Autotrófica

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

Distribución

Caribe PresenteA, Centroamérica: Costa Rica PresenteA; Guatemala PresenteA; Honduras PresenteA; Nicaragua PresenteA; Panamá PresenteA, México (país) Nativo y no endémicoA, Norteamérica al N de México PresenteA, Sudamérica PresenteA

Elevación

850 – 3000 mA

Ecología y Hábitat

On rocky slopes in mesic to dryish areas, open woods or clearingsA

Tipo de vegetación

No especificado

Categoría IUCN

No incluidaB

Categoría NOM-059-SEMARNAT-2010

No incluidaC

Estatus del taxón

(A) Como definida actualmente, probablemente una entidad natural (monofilética)

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

Bibliografía

A. Mickel, J. T. & Smith, A. R. 2004: The Pteridophytes of Mexico Vol. 88
B. IUCN 2022: The IUCN Red List of Threatened Species. Versión 2022-2
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]