Anemia multiplex Mickel
Descripción
Rhizomes horizontal, compact, short-creeping, ca. 3 mm diam.; rhizome hairs orange; fronds erect, sterile ones to 23 cm long, fertile to 33 cm long; stipes stramineous, subglabrous to lightly hairy, 1⁄3–1⁄2 the sterile frond length, 1⁄2–3⁄4 of the fertile frond length, 0.8–2 mm diam.; blades narrowly deltate, 1-pinnate, 3.6–5.6 cm wide, chartaceous; pinnae 7–11 pairs, oblong, bases mostly narrowly cuneate, apices obtuse, minutely denticulate to entire or somewhat crenulate, the proximal pinnae often slightly incised, 2.5–3 times as long as broad; blade surfaces glabrous abaxially, short-hirsute adaxially; veins free; fertile fronds taller and longer-stiped than the sterile; fertile pinnae approximate to the sterile blade, far exceeding the sterile blades in height; spores ca. 90 µm diam., with broad smooth ridges, furrows between ridges narrow, many malformed; 2n=532 (Jal, Nay).A
Ejemplar revisado
Col (McVaugh 16077, MICH). Jal (Cochrane et al. 13052, NY; Mickel 1362, 1701, NY). Nay (Mickel 1384, 1713, NY).A
Distribución
México (Country) endemicB
Elevación
900–1400 mA
Ecología y Hábitat
Disturbed, lightly wooded, grassy banks and pastures.A
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
This species is remarkable in that it is tetrakaidecaploid, 2n=532. There is considerable spore malformation, but there are well formed spores as well. In some squashes there appear to be some univalents.
Anemia multiplex is most easily confused with A. jaliscana, which can be distinguished by the well formed spores (seen under a dissecting scope) and narrow, widely set spore ridges.
Anemia multiplex is distinct from A. oblongifolia in its larger size, deltate blades with narrow apices, longer pinnae, and longer stipes. It is also similar to A. pastinacaria in the deltate blades and long pinnae, but the pinnae are more obtuse, the plants are larger, the spores have broad ridges, and the chromosome number is high with at least partial spore abortion.
There is considerable variation in the size of the plants, even within the same population, but the general form, spore morphology, and chromosome number seem to be the same.
A
Anemia multiplex is most easily confused with A. jaliscana, which can be distinguished by the well formed spores (seen under a dissecting scope) and narrow, widely set spore ridges.
Anemia multiplex is distinct from A. oblongifolia in its larger size, deltate blades with narrow apices, longer pinnae, and longer stipes. It is also similar to A. pastinacaria in the deltate blades and long pinnae, but the pinnae are more obtuse, the plants are larger, the spores have broad ridges, and the chromosome number is high with at least partial spore abortion.
There is considerable variation in the size of the plants, even within the same population, but the general form, spore morphology, and chromosome number seem to be the same.
A