Anemia affinis Baker
Descripción
Rhizomes horizontal, compact, 2–4 mm diam.; rhizome hairs orange; fronds erect, 13–20 cm long; stipes 1⁄3–1⁄2 the frond length, 0.8–1.3 mm diam., stramineous, sparsely hirsute; blades oblong to narrowly deltate, 1-pinnate, 4–9 cm wide, each tapering to a pinnatifid apex or with narrowly obdeltate terminal pinna; pinnae 2–6 pairs, opposite to subopposite, oblong, dimidiate, bases truncate, apices obtuse, margins denticulate; blade surfaces very short-hairy adaxially, glabrous abaxially; veins free; fertile fronds to 35 cm long, stipe 2⁄3–3⁄4 the frond length; fertile pinnae approximate to the sterile pinnae, far surpassing the sterile blade in height; spores striate, ridges smooth; 2n=152 (Sin).A
Ejemplar revisado
Dgo (Ortega 4329, US). Jal (González T. 368, MICH). Nay (Feddema 794, IEB; Mason 3089, ARIZ; McVaugh 18694, NY). Sin (Gentry 6502, NY; Ownbey & Ownbey 1891, NY; Reveal 4048, NY). Son (Gentry et al. 19338, NY; Van Devender 93-1169, ASU).A
Distribución
México (Country) endemicB
Elevación
350–1200 mA
Ecología y Hábitat
Rocky, grassy slopes.A
Tipo de vegetación
Oak and pine woods.A
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Anemia affinis is most often confused with A. jaliscana, which it resembles in general blade dissection. Anemia jaliscana in Nayarit closely approaches A. affinis in the denticulate blade margins and size of fronds, but in A. affinis the proximal pinnae are never incised, and the pinnae are more rounded and more sharply denticulate. Anemia jaliscana is more hirsute, being short-hairy on both surfaces whereas A. affinis is glabrous abaxially. Gentry 6502 (NY) from Sinaloa consists of one frond of A. affinis, one frond of A. jaliscana, and two fronds of the presumed hybrid, with malformed spores. Anemia affinis rarely crosses with A. hirsuta in Nayarit (Keil & Canne 8962-1, NY), Jalisco (Schugun 16159, GUADA), and Sinaloa (2n_304) to form what appears to be a fertile hybrid (Mickel 1718, NY). Mickel 1719 (NY) appears to be a fertile (or apomictic) hybrid with A. pastinacaria, judging from the frond form and chromosome number, 2n=ca. 380 (Sin). González Tamayo 368 (MICH) (Fig. 21E) from Jalisco is a very small fertile plant (7–10 cm) but consistent with A. affinis in being hairy adaxially, glabrous abaxially.A