Elaphoglossum hartwegii
Description
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
A. Mickel, J. T. & Smith, A. R. 2004: The Pteridophytes of Mexico Vol. 88
Discussion
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.
B
B. Mickel, J. T. & Smith, A. R. 2004: The Pteridophytes of Mexico Vol. 88
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.
B
Distribution
Costa Rica presentC, Guatemala presentC, México (Country) native native and not endemicC,D: Chiapas nativeC; Distrito Federal nativeC,E; Durango nativeD; Guerrero nativeD; Jalisco nativeC,F,G; Michoacán de Ocampo nativeC; México nativeC; Oaxaca nativeD; Puebla nativeC; Veracruz de Ignacio de la Llave nativeC,H; Zacatecas nativeD, South America presentC
Habitat & Ecology
On shaded ledges.I
I. Mickel, J. T. & Smith, A. R. 2004: The Pteridophytes of Mexico Vol. 88
Specimen
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).J
J. Mickel, J. T. & Smith, A. R. 2004: The Pteridophytes of Mexico Vol. 88