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:
Thelypteridaceae
Thelypteridaceae
Description:
Species Description - Rhizome short-creeping to suberect; stipe to ca. 25(-45) cm long, 2-5(-8) mm diam., darkened, often bearing tuberculiform aerophores at intervals of 2-3(-7) cm, pubescent (infrequently glabrescent); fronds (including "abortive" pinnae) (35-)50-100(-125) cm long, to 45 cm wide, toward base with (3-)5-12 pairs of wart-like, easily overlooked pinnae; largest pinnae (5-) 10-2 5 cm long, (1-) 1.5-3(-4.5) cm wide, with a small aerophore at base; segments slightly oblique and subfalcate, ca. 3-5 mm wide, apex rounded to acutish, margin slightly revolute; basal pair of segments considerably reduced in the lower pinnae; costae below antrorsely strigose and with brownish to blackish subclathrate scales especially toward the base; leaf tissue dark green when dried, chartaceous to subcoriaceous, pubescent on both sides or glabrous, the hairs mostly 0.20.3 mm long, those below sometimes hamate; sori supramedial, exindusiate; sporangia glabrous; n = 29.
Species Description - Rhizome short-creeping to suberect; stipe to ca. 25(-45) cm long, 2-5(-8) mm diam., darkened, often bearing tuberculiform aerophores at intervals of 2-3(-7) cm, pubescent (infrequently glabrescent); fronds (including "abortive" pinnae) (35-)50-100(-125) cm long, to 45 cm wide, toward base with (3-)5-12 pairs of wart-like, easily overlooked pinnae; largest pinnae (5-) 10-2 5 cm long, (1-) 1.5-3(-4.5) cm wide, with a small aerophore at base; segments slightly oblique and subfalcate, ca. 3-5 mm wide, apex rounded to acutish, margin slightly revolute; basal pair of segments considerably reduced in the lower pinnae; costae below antrorsely strigose and with brownish to blackish subclathrate scales especially toward the base; leaf tissue dark green when dried, chartaceous to subcoriaceous, pubescent on both sides or glabrous, the hairs mostly 0.20.3 mm long, those below sometimes hamate; sori supramedial, exindusiate; sporangia glabrous; n = 29.
Discussion:
Polypodium rude Kunze, Linnaea 13: 133. 1839. Dryopteris rudis (Kunze) Christensen, Index filic. 289. 1905. Type. Mexico. [Veracruz:] Jalapa, Schiede s.n. (LZ, destroyed). Complete synonymy cited in A. R. Smith (1983). This is one of the most common and “weedy” species of Thelypteris in Oaxaca. Specimens show great variability in size, texture, and pubescence. The presence of subclathrate costal scales will distinguish this species from all others in the state except for the much less common T. pilosohispida (which see for differences). Other distinguishing characters include the exindusiate sori and antrorse costal hairs.
Polypodium rude Kunze, Linnaea 13: 133. 1839. Dryopteris rudis (Kunze) Christensen, Index filic. 289. 1905. Type. Mexico. [Veracruz:] Jalapa, Schiede s.n. (LZ, destroyed). Complete synonymy cited in A. R. Smith (1983). This is one of the most common and “weedy” species of Thelypteris in Oaxaca. Specimens show great variability in size, texture, and pubescence. The presence of subclathrate costal scales will distinguish this species from all others in the state except for the much less common T. pilosohispida (which see for differences). Other distinguishing characters include the exindusiate sori and antrorse costal hairs.
Distribution:
Mexico North America| Bolivia South America| Venezuela South America| Panama Central America| Guatemala Central America|
Mexico North America| Bolivia South America| Venezuela South America| Panama Central America| Guatemala Central America|