Asplenium hallbergii Mickel & Beitel
Descripción
Roots wiry, fibrous, not proliferous; rhizomes short-creeping; rhizome scales bicolorous, central portion black, heavily sclerotic, lumina occluded, with narrow brown clathrate wings, 1–2 X 0.5 mm, entire; fronds clumped, (8–)12–30(–40) cm long; stipes castaneous to atropurpureous, lustrous, 2–4 cm X 0.5–1.2 mm, 1⁄10–1⁄3 of frond length, glabrous, adaxially with wings entire proximally, 0.1–0.2 mm wide, distally the wings fringed with minute castaneous papillae; blades linear, 1-pinnate, (10–)18–25(–35) cm X 6–18(–22) mm, apices pinnatifid, not proliferous; rachises castaneous, lustrous, glabrous, with wings 0.1–0.3mmwide, fringed with minute papillae less than 0.05 mm long; pinnae oblong or rhomboid, dimidiate, 20–40 pairs, 4–8(–12) X 2–5 mm, sessile, articulate, rachis color running onto pinna stalks, bases slightly auriculate, apices rounded, margins entire to slightly crenatedentate at tips; veins obscure, but tips evident adaxially; indument abaxially of scattered, tan, appressed, clavate hairs 0.1–0.2 mm long; sori 1–4 pairs per pinna on both sides of midveins; indusia 2–3(–4) X 0.5–0.8(–1) mm, margins erose to suberose; spores reniform.A
Forma de vida
TerrestreA
Ejemplar revisado
Ags (Cerda L. 863, ENCB, IEB). Chih (Fraser-Jenkins 13506, NY). DF (Pringle 8754, UC). Dgo (Breedlove 18819, CAS, NY). Hgo (Muñoz B. 3, ENCB). Gro (Lorea 2284, FCME). Gto (Díaz B. 3971, ENCB, IEB). Jal (Corres Zepeda 16112, UC). Méx (Rose & Painter 7204, US). Mich (King & Soderstrom 5096, UC, US). Mor (Copeland herb. 67 p.p., UC, US). Oax (Mickel 4440, ENCB, NY, UC). Pue (Tenorio L. 15120, MEXU). Qro (Díaz B. & Carranza 7360, IEB). SLP (Parry & Palmer 978 1⁄2B, NY). Tlax (Sánchez 368, CIB). Ver (Ventura A. 185, ENCB).A
Distribución
México (Country) endemicB
Elevación
1500–3200 mA
Tipo de vegetación
Bosque de pino-encinoA
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Asplenium hallbergii is very closely related to A. monanthes, and often identified as that species or as A. castaneum. In general, it has smaller (shorter and narrower) pinnae than A. monanthes, and can be readily distinguished by the papillate rachis wings and the occluded lumina of the smaller (1–2 mm) rhizome scales (which are clathrate in A. castaneum). The indusia are not as wide as those of A. castaneum and the pinnae are more oblong. Asplenium polyphyllum has larger, clathrate rhizome scales, nonpapillate rachis wings, and subterminal proliferous buds in axils of distal pinnae. Like A. castaneum and A. polyphyllum, A. hallbergii occurs at relatively high elevations. Larger frond size, occluded rhizome scales, and papillate rachis wings distinguish A. hallbergii from A. oligosorum and A. olivaceum. Prominent adaxial hydathodes separate A. hallbergii from A. resiliens and A. palmeri.
Tejero-Díez 2865 (IZTA), from Edo. México, agrees with A. hallbergii in nearly all characters except the lack of papillae along the adaxial rachis wings; the spores seem well formed. González T. 418 (LL), from Jalisco, also lacks papillae on the rachis wings, but has many collapsed sporangia. We have seen a number of mixed collections of A. hallbergii and A. monanthes, e.g., Purpus s.n., Feb 1903 (UC), from Ixtaccihuatl; these mixed gatherings give us increased confidence of the distinctness of A. hallbergii.
A
Tejero-Díez 2865 (IZTA), from Edo. México, agrees with A. hallbergii in nearly all characters except the lack of papillae along the adaxial rachis wings; the spores seem well formed. González T. 418 (LL), from Jalisco, also lacks papillae on the rachis wings, but has many collapsed sporangia. We have seen a number of mixed collections of A. hallbergii and A. monanthes, e.g., Purpus s.n., Feb 1903 (UC), from Ixtaccihuatl; these mixed gatherings give us increased confidence of the distinctness of A. hallbergii.
A