Diplazium plantaginifolium (L.) Urb.
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Authority
Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.
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Family
Athyriaceae
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Scientific Name
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Description
Species Description - Rhizome ascending to erect; rhizome scales concolorous black, lustrous, deltate, 0.8-1 mm long, 0.5-0.8 mm wide; fronds clumped; stipe 24-35 cm long, 5/8 the frond length, green, glabrous except sparse black scales at base (2-3 mm long); blade 15-22 cm long, 3-5.5 cm wide, simple, undivided, lanceolate, apex abruptly narrowed to attenuate tip, base truncate to broadly cuneate, margin crenulate, occasionally serrulate toward the apex, occasionally proliferous at base of blade, glabrous; veins free, 3- to 4-forked; sori diplazioid, mostly single, often only along acroscopic vein branch, indusium 4-30 mm long, 0.3-0.5 mm wide, entire.
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Discussion
Asplenium plantaginifolium Linnaeus, Syst. nat. ed. 10, 2: 1323. 1759. Asplenium plantagineum Linnaeus, Sp. pl. 2: 1537. 1763, nom. superfl. Type. Jamaica. Manchester: “Mayday-hills,” P. Brown; the specimen, formerly in the Linnaean Herbarium, is no longer there and is presumed lost. Neotype (designated by Proctor, 1985: 394). Jamaica. St. Catherine: Mt. Diablo, vie. of Hollymount, Maxon 1949 (US; isoneotype NY!—2 sheets). Diplazium plantaginifolium is distinct by its simple blade. It crosses with D. ternatum and forms a plant (Hallberg 1615, NY, US, from Dist. Villa Alta, 150-250 m) with ternate blade, entire to slightly undulate margin, anterior vein branch forming areoles, and abortive spores, and occurs at a relatively low elevation for D. ternatum.
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Distribution
Terrestrial in moist forest; Ixtlán, Tuxtepec; 150-700 m. Mexico (Ver, Oax, Chis); Guat to Pan; WI, Trin; Ven, Bol, s Braz.
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