Elaphoglossum hartwegii T.Moore
Descripción
Rhizomes long-creeping, 1–1.5 mm diam.; rhizome scales linear-lanceolate, reddish brown to black, lustrous with markedly paler margins and sagittate bases, entire, ca. 3 mm long; fronds often 1 cm apart, 7–21 X 1–2.1 cm; phyllopodia distinct; stipes 1⁄2–2⁄3 the frond length, with scales mostly 1–2 mm long, brown with pale margins, appressed to slightly spreading, entire to slightly toothed; blades narrowly elliptic, chartaceous to subcoriaceous, acuminate, acute, or obtuse at apices, cuneate at bases; veins inconspicuous, 0.8–1 mm apart, at 60–70° angle to costa; hydathodes present but inconspicuous; blade scales of the adaxial surface generally abundant but not overlapping, lanceolate to narrowly deltate, peltate, brown with pale margins, the abaxial surfaces often essentially glabrous; fertile fronds somewhat taller than the sterile, with longer stipes (2⁄3–3⁄4 the frond length), scales sparse abaxially on the costae, not present among the sporangia.A
Forma de vida
o epipétrica. TerrestreA
Ejemplar revisado
Chis (Breedlove 24315, DS, NY; Matuda 2314, US). DF (Beaman 2800, MSC). Jal (McVaugh 10074, MICH, NY). Méx (Beaman 2823, MEXU, MSC, UC, US; Matuda 27573, MEXU, UC, US; Rzedowski 23469, LL, MEXU, TEX, US, WIS). Mich (Leavenworth & Hoogstraal 1190, MO). Pue (Hernández X. & Sharp X-168, MEXU). Ver (Nee & Diggs 24844, F, NY, XAL).A
Elevación
3000 – 4100 mA
Ecología y Hábitat
On shaded ledges.A
Tipo de vegetación
Bosque de pinoA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Specimens in Mexico and Guatemala tend to have somewhat broader leaf blades than those from South America, but further study is necessary in this complex before species distinctions can be made with confidence.
Mickel and Beitel (1988) treated E. hartwegii as a synonym of E. mathewsii (Fée) T. Moore, but now, with more plentiful material of this complex at hand from Peru (cf. J. T. Mickel, Elaphoglossum, in Pteridophyta of Peru, IV. Fieldiana, Bot., n.s., 27: 111-166. 1991), we believe the two to be distinct. More study is needed to determine fully the ranges of both species. See E. gratum for discussion of the hybrid between that species and E. hartwegii.
A
Mickel and Beitel (1988) treated E. hartwegii as a synonym of E. mathewsii (Fée) T. Moore, but now, with more plentiful material of this complex at hand from Peru (cf. J. T. Mickel, Elaphoglossum, in Pteridophyta of Peru, IV. Fieldiana, Bot., n.s., 27: 111-166. 1991), we believe the two to be distinct. More study is needed to determine fully the ranges of both species. See E. gratum for discussion of the hybrid between that species and E. hartwegii.
A