Pteris quadriaurita Retz.
Descripción
Rhizome erect or suberect; rhizome scales 3–4 X 0.5 mm, tricolorous, central portion lustrous, bases golden brown, tips dark brown, outer portion brown, erose; fronds 50–200 cm long; stipes ca. 1⁄2 the frond length, stramineous, glabrous; blades pinnatepinnatifid to bipinnate, sinuses symmetrical, the sinus bases often with one to several teeth, either on adaxial or abaxial surfaces or both; ultimate segments entire, obtuse, adaxial surfaces glabrous, abaxial surfaces with short hairs 0.1 mm long; rachis awns reduced to 1–2 papillae, 0.1 mm long, pinna awns 0.5–5 mm long; veins free, running to margins; indusia 0.3 mm wide, entire, paraphyses present; spores dark brown, of varying sizes; 2n=58 (Ceylon, Jam), 116 (SLP, Jam), n=2n=87 (Jam, Nepal).A
Ejemplar revisado
Chis (Breedlove 32167, DS, ENCB). Col (Sanders et al. 10480, MEXU, UC). Gro (Mexia 8895, B, UC, US). Hgo (Rzedowski 32468, ENCB). Jal (Mexia 1692, CAS, UC, US). Méx (Matuda 30501, MEXU, US). Mich (Ventura A. 4434, IEB). Mor (Lyonnet 3147, MEXU, US). Nay (McVaugh 16526, US). Oax (Mickel 1069, MEXU, NY, US). Qro (Sotero S. 809, IEB). SLP (Pringle 3971, DS, MEXU, UC, US). Tam (Breedlove & Anderson 63689, CAS). Ver (Purpus 2842, NY, UC).A
Elevación
450 – 1400 mA
Ecología y Hábitat
Coffee plantations.A
Tipo de vegetación
Selva alta, Bosque de neblina/mesófilo, Bosque de pino-encinoA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
This is the most common species with pinnate-pinnatifid blades, exaggerated basiscopic pinnules, and free veins. It resembles Pteris biaurita and P. pungens, which see for further discussion. The spores of all the specimens exhibit great heterogeneity, with some spores two to three times larger than others.
Pringle 3971 from San Luis Potosí and Breedlove 22175, 32167, 33060, 33157 (DS), and 56562 (CAS) from Chiapas, have scaly buds on the adaxial side of the rachises, but in all other respects resemble nonproliferous specimens.
A
Pringle 3971 from San Luis Potosí and Breedlove 22175, 32167, 33060, 33157 (DS), and 56562 (CAS) from Chiapas, have scaly buds on the adaxial side of the rachises, but in all other respects resemble nonproliferous specimens.
A