Eriosorus flexuosus (Humb. & Bonpl.) Copel.
Descripción
Rhizomes creeping, slender, 3 mm diam.; rhizome hairs scalelike, with thick, inflated cells, reddish brown, 2 X 0.5 mm; fronds scandent or scrambling, 1–3 m; stipes 1⁄3 or less the frond length, castaneous, glabrous except for scattered short hairs 0.5–0.8 mm long proximally; blades 4–5-times pinnate, ca. 10–15 cm broad; rachises flexuous, hairs sparse to abundant, often clumped in axils of blade branches; pinnule rachises retroflexed; ultimate segments narrow, 0.5 mm wide, apices emarginate, thin hairs scattered along veins on adaxial and abaxial surfaces; vein endings enlarged; spores tan; 2n=174 (CR).A
Forma de vida
TerrestreA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
The highly dissected blades with linear segments strongly resemble those of Odontosoria schlechtendalii. Sterile material of Eriosorus flexuosus can be distinguished by having occasional blade hairs and rhizome indument of hairs, whereas Odontosoria has glabrous blades and scaly rhizomes.
Key to the Mexican Varieties of Eriosorus flexuosus
Rhizome hairs or scales dark brown to black; fronds scandent, herbaceous or rigid.........................................................................................var. flexuosus.
Rhizome scales light brown or tan; fronds erect and delicately herbaceous..............................................................................................var. galeanus
Eriosorus flexuosus var. flexuosus (Humb. & Bonpl.) Copel., Gen. Fil. [Copeland] 58. 1947
Distinct by its dark rhizome indument and scandent fronds.
Distribution. Rocky banks in wet montane forests, especially in open areas by roads, streams; 1650–3025 m. Mexico; Guat, Hond, Nic, Salv, CR, Pan; Hisp; Col, Ven, Guy, Ec, Peru, Braz, Bol.
Selected Specimens Examined. Chis (Breedlove 22797, DS; Matuda 5241, F, GH, MEXU, US; Téllez & Pérez G. 13212, MEXU). Gro (Breedlove 36022, CAS, MEXU, NY; Hinton 14309, NY, US; Lorea 2279, IEB). Oax (Mickel 4244, 6744, NY; Rzedowski 30621, 33363, NY).
Eriosorus flexuosus var. galeanus A.F.Tryon, Contr. Gray Herb. 200: 164, fig. 33B, 34B. 1970
Distinct by its pale rhizome indument and erect fronds.
Distribution. On banks in pine and oak forests; 2400–2570 m. Mexico.
Specimens Examined. Gro (Hinton 14221, 14309, GH, US; Ramírez Santos 21, IEB; Rzedowski & McVaugh 125, MEXU, NY; Velásquez 752, FCME). Oax (Calzada 19459, NY).
A,D
Key to the Mexican Varieties of Eriosorus flexuosus
Rhizome hairs or scales dark brown to black; fronds scandent, herbaceous or rigid.........................................................................................var. flexuosus.
Rhizome scales light brown or tan; fronds erect and delicately herbaceous..............................................................................................var. galeanus
Eriosorus flexuosus var. flexuosus (Humb. & Bonpl.) Copel., Gen. Fil. [Copeland] 58. 1947
Distinct by its dark rhizome indument and scandent fronds.
Distribution. Rocky banks in wet montane forests, especially in open areas by roads, streams; 1650–3025 m. Mexico; Guat, Hond, Nic, Salv, CR, Pan; Hisp; Col, Ven, Guy, Ec, Peru, Braz, Bol.
Selected Specimens Examined. Chis (Breedlove 22797, DS; Matuda 5241, F, GH, MEXU, US; Téllez & Pérez G. 13212, MEXU). Gro (Breedlove 36022, CAS, MEXU, NY; Hinton 14309, NY, US; Lorea 2279, IEB). Oax (Mickel 4244, 6744, NY; Rzedowski 30621, 33363, NY).
Eriosorus flexuosus var. galeanus A.F.Tryon, Contr. Gray Herb. 200: 164, fig. 33B, 34B. 1970
Distinct by its pale rhizome indument and erect fronds.
Distribution. On banks in pine and oak forests; 2400–2570 m. Mexico.
Specimens Examined. Gro (Hinton 14221, 14309, GH, US; Ramírez Santos 21, IEB; Rzedowski & McVaugh 125, MEXU, NY; Velásquez 752, FCME). Oax (Calzada 19459, NY).
A,D