Anemia munchii Christ
Descripción
Rhizomes horizontal to somewhat ascending, 3–5 mm diam.; rhizome hairs reddish brown; fronds erect, 7–23 cm tall; stipes 1⁄3–1⁄2 the frond length, 1–1.5 mm diam., stramineous, pilose; blades deltate-oblong, 1-pinnate, 6–8 cm wide, chartaceous, glabrous; pinnae (2–)4–7 pairs, opposite to subopposite, proximal pinnae short-petiolate 1–2 mm, distal pinnae narrowly adnate, elliptic to ovate, rounded at bases, slightly excavate basiscopically, apices obtuse to acute, margins entire to minutely serrulate, glabrous; veins casually anastomosing, 10–20 anastomoses per pinna; fertile fronds taller (11–37 cm long) and longer-stiped (1⁄2–2⁄3 of the frond length) than the sterile fronds; fertile pinnae approximate to the sterile blade, far exceeding the sterile blades in height; spores with few narrow ridges bearing short, blunt, peg-like spines; 2n=ca. 228 (Oax).A
Ejemplar revisado
Chis (only the type). Oax (Antonio B. & Heinrich GUI 232, MEXU; Mickel 6874, NY). Ver (Beaman 5237, MEXU p.p.; Calzada 8109, XAL; Copeland herb. s.n., 9 Mar 1938, MICH; Medina A. & Vázquez E. 496, MEXU, XAL; Purpus 2229, GH, NY, UC, US).A
Distribución
México (Country) endemicB
Elevación
200 mA
Ecología y Hábitat
Locally common on moist wooded slopes by streams at low elevations.A
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
This species is much like A. phyllitidis in having netted veins and spiny spores, but the veins are mostly free (only 10–20 anastomoses per pinna, especially along the margins), and the pinnae are more rounded and somewhat adnate toward the blade apices. A clear chromosome count has not been made, the best one showing 90–100 bivalents at meiosis. If the chromosome number for A. muenchii is indeed n=114, it is different from the number known for A. phyllitidis (2n=152, and presumably also 2n=76). The type material of A. muenchii agrees with Mickel 6847 (Oaxaca) in the number of anastomoses per pinna and general form, but the pinnae are more numerous and smaller. Unfortunately, the fertile pinnae of the type had been cut off just below the sporangia, so the spores are unknown. Anemia muenchii more closely resembles A. Xparaphyllitidis in the greater number and smaller size of the pinnae, but the latter has malformed spores, lanceolate pinnae, and generally 25–32 anastomoses per pinna.A