Monographs Details:
Authority:
Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.
Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.
Family:
Dryopteridaceae
Dryopteridaceae
Description:
Species Description - Rhizome short-creeping, 3-5 mm diam.; rhizome scales linear, blackish maroon to castaneous with tortuous hair tip, ca. 3 mm long, entire; phyllopodia distinct but very short (2-3 mm long); fronds clumped, 10-39 cm long, 0.9-3.4 cm wide; stipe ca. ¼ the frond length, with scales 1-2 mm long, some spreading and broader, some narrow and appressed, entire or toothed to stellate; blade narrowly elliptic, chartaceous, apex acuminate, base cuneate; veins visible, free, simple or once-forked, ca. 1 mm apart, at 6070° angle; hydathodes lacking; blade scales sparse, linear-lanceolate with hair teeth, mostly on the upper surface and on young fronds, often more abundant near the margins; lower surface with only stellate hairs or scales as on upper surface, rarely glabrous; fertile fronds about same length as the sterile fronds but longer stipe, ca. 2/3 the length (in greatly reduced specimens the fertile fronds may far exceed the sterile), scales on the abaxial midvein; spores with broad, low, smooth ridges.
Species Description - Rhizome short-creeping, 3-5 mm diam.; rhizome scales linear, blackish maroon to castaneous with tortuous hair tip, ca. 3 mm long, entire; phyllopodia distinct but very short (2-3 mm long); fronds clumped, 10-39 cm long, 0.9-3.4 cm wide; stipe ca. ¼ the frond length, with scales 1-2 mm long, some spreading and broader, some narrow and appressed, entire or toothed to stellate; blade narrowly elliptic, chartaceous, apex acuminate, base cuneate; veins visible, free, simple or once-forked, ca. 1 mm apart, at 6070° angle; hydathodes lacking; blade scales sparse, linear-lanceolate with hair teeth, mostly on the upper surface and on young fronds, often more abundant near the margins; lower surface with only stellate hairs or scales as on upper surface, rarely glabrous; fertile fronds about same length as the sterile fronds but longer stipe, ca. 2/3 the length (in greatly reduced specimens the fertile fronds may far exceed the sterile), scales on the abaxial midvein; spores with broad, low, smooth ridges.
Discussion:
Acrostichum petiolatum Swartz, Prodr. veg. ind. occ. 128. 1788. Acrostichum viscosum Swartz, Syn. fil. 10, 193. 1806, nom. superfl. illeg. Elaphoglossum viscosum (Swartz) J. Smith, J. Bot. (Hooker) 4: 148. 1841. Type. Jamaica. Swartz s.n. (S). Acrostichum schiedei Kunze, Analecta pteridogr. 10. 1837. Type. Mexico. Veracruz: Jalapa, Schiede s.n. (B!; isotypes NY!, P!). Acrostichum schmitzii Mettenius ex Kuhn, Linnaea 36: 51. 1869. Type. Mexico. Schmitz 3 p.p. (LZ, destroyed). There is considerable variation in the degree of scaliness, especially on the lower surface and the degree of resinous dotting, but the significance of this variation is not yet understood. Elaphoglossum petiolatum closely resembles E. huacssaro (Ruiz) Christ in the resinous dots of the lower blade surface and the frequent concentration of scales along the margin, but E. huacssaro has a more erect rhizome, an obtuse blade apex, and the fertile frond is noticeably longer than the sterile.
Acrostichum petiolatum Swartz, Prodr. veg. ind. occ. 128. 1788. Acrostichum viscosum Swartz, Syn. fil. 10, 193. 1806, nom. superfl. illeg. Elaphoglossum viscosum (Swartz) J. Smith, J. Bot. (Hooker) 4: 148. 1841. Type. Jamaica. Swartz s.n. (S). Acrostichum schiedei Kunze, Analecta pteridogr. 10. 1837. Type. Mexico. Veracruz: Jalapa, Schiede s.n. (B!; isotypes NY!, P!). Acrostichum schmitzii Mettenius ex Kuhn, Linnaea 36: 51. 1869. Type. Mexico. Schmitz 3 p.p. (LZ, destroyed). There is considerable variation in the degree of scaliness, especially on the lower surface and the degree of resinous dotting, but the significance of this variation is not yet understood. Elaphoglossum petiolatum closely resembles E. huacssaro (Ruiz) Christ in the resinous dots of the lower blade surface and the frequent concentration of scales along the margin, but E. huacssaro has a more erect rhizome, an obtuse blade apex, and the fertile frond is noticeably longer than the sterile.
Distribution:
Mexico North America| Brazil South America| Peru South America| Venezuela South America| Colombia South America| West Indies| Panama Central America| Guatemala Central America|
Mexico North America| Brazil South America| Peru South America| Venezuela South America| Colombia South America| West Indies| Panama Central America| Guatemala Central America|