Pelazoneuron ovatum (R.P.St.John) A.R.Sm. & S.E.Fawc.
Forma de vida
TerrestreA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
(In relation to the synonym Thelypteris ovata var. lindheimeri)
Pelazoneuron ovatum var. lindheimeri (C.Chr.) A.R.Sm., Sida, Bot. Misc. 59: 64. 2021
Thelypteris ovata var. lindheimeri (C.Chr.) A.R.Sm., Amer. Fern J. 61(1): 30. 1971
Dryopteris normalis var. lindheimeri C.Chr., Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. Math. Afd. ser. 7, 10(2): 182. 1913
Rhizomes creeping; fronds (30–)55–135(–165) cm long; stipes about as long as blades, (1.5–)2–6 mm diam., the scales at bases linear-lanceolate, tan to brown, ciliate; blades (18–)30–75 X 10–50 cm, tapering evenly toward the pinnatifid apices; rachises with scattered, persistent, narrow scales 1–3 mm long, moderately hairy to glabrescent; pinnae (5–)10–25 X 0.8–2.2 cm, incised more than 0.8 the way to costae; proximal ones the largest, often somewhat narrowed toward their bases, proximal segments of medial pinnae slightly longer than more distal segments, often parallel to rachises; segments oblique, mostly 2–4 mm wide, subfalcate, usually acute at tips; veins 6–13 pairs per segment, proximal pairs from adjacent segments reaching margins at or just above sinuses; indument abaxially of linear tan costal scales 0.5–1.5 mm long and moderate to dense hairs 0.2–0.5 mm long on rachises and costae, veins and tissue between veins usually moderately to densely hairy, adaxially the blades glabrous except along rachises and costae; sori supramedial to submarginal, indusia with hairs mostly 0.2–0.4 mm long, paraphyses absent; 2n=72 (Tex).
Distribution. Along trails; 50–1500(–2100) m. USA (Tex); Mexico; Guat, Bel; Jam.
Selected Specimens Examined Related to the Synonym Thelypteris ovata var. lindheimeri. Camp (Steere 1784, MICH). Chih (Wendt & Lot 99, CHAPA, MEXU, TEX). Chis (Davidse 29580 et al., UC). Coah (Villareal 3998, IEB, MEXU). Gro (Rhymes & Rowell 3874B, MICH, US). Hgo (Croat & Hannon 65980, UC). Mor (Lorence 5035, MEXU, TEX). Nay (McVaugh 18808, IEB, MICH). NL (Dorr 2591, TEX, UC). Oax (Yatskievych 85-125 et al., UC). Pue (Sánchez 655, MEXU, US). Qro (Rzedowski 48438, IEB, XAL). SLP (Duncan 2409, UC). Tab (González 17140, UC). Tam (Palmer 183, NY, UC, US). Ver (Harriman 15662, UC).
Unverified, Doubtful, or Mistaken Reports. Méx (Luján 5 and Tejero-Díez 2670, 2755, IZTA, cited by Tejero-Díez & Arreguín-Sánchez, 2004; the specimens are, however, T. puberula var. puberula).
McVaugh 18809 (MICH) from Nayarit, was cited by Mickel (1992) as T. puberula var. puberula, but this number at IEB is T. ovata var. lindheimeri. It is unusual in having large (3 X 1 cm) pinnatifid auricles at the bases of the proximal pinnae. Thelypteris ovata var. lindheimeri is most similar to T. puberula, but differs in the more elongate proximal segments of the proximal pinnae, longer and stiffer hairs on costae abaxially, lighter-colored and longer scales on the rachises and costae abaxially, and submarginal sori. Apparently, it also differs in chromosome number. Variety ovata is known from the southeastern United States and Bahamas; it is based on Thelypteris ovata R. P. St. John in Small, Ferns S.E. States 239, cum tab. 1938 [syns.: Dryopteris ovata (R. P. St. John) Broun, Ind. N. Amer. Ferns 76. 1938. Christella ovata (R. P. St. John)A. Löve & D. Löve, Taxon 26: 326. 1977. Type. U.S.A. Florida: Citrus Co., Lecanto, R. St. John [394] (NY!)].A
Pelazoneuron ovatum var. lindheimeri (C.Chr.) A.R.Sm., Sida, Bot. Misc. 59: 64. 2021
Thelypteris ovata var. lindheimeri (C.Chr.) A.R.Sm., Amer. Fern J. 61(1): 30. 1971
Dryopteris normalis var. lindheimeri C.Chr., Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. Math. Afd. ser. 7, 10(2): 182. 1913
Rhizomes creeping; fronds (30–)55–135(–165) cm long; stipes about as long as blades, (1.5–)2–6 mm diam., the scales at bases linear-lanceolate, tan to brown, ciliate; blades (18–)30–75 X 10–50 cm, tapering evenly toward the pinnatifid apices; rachises with scattered, persistent, narrow scales 1–3 mm long, moderately hairy to glabrescent; pinnae (5–)10–25 X 0.8–2.2 cm, incised more than 0.8 the way to costae; proximal ones the largest, often somewhat narrowed toward their bases, proximal segments of medial pinnae slightly longer than more distal segments, often parallel to rachises; segments oblique, mostly 2–4 mm wide, subfalcate, usually acute at tips; veins 6–13 pairs per segment, proximal pairs from adjacent segments reaching margins at or just above sinuses; indument abaxially of linear tan costal scales 0.5–1.5 mm long and moderate to dense hairs 0.2–0.5 mm long on rachises and costae, veins and tissue between veins usually moderately to densely hairy, adaxially the blades glabrous except along rachises and costae; sori supramedial to submarginal, indusia with hairs mostly 0.2–0.4 mm long, paraphyses absent; 2n=72 (Tex).
Distribution. Along trails; 50–1500(–2100) m. USA (Tex); Mexico; Guat, Bel; Jam.
Selected Specimens Examined Related to the Synonym Thelypteris ovata var. lindheimeri. Camp (Steere 1784, MICH). Chih (Wendt & Lot 99, CHAPA, MEXU, TEX). Chis (Davidse 29580 et al., UC). Coah (Villareal 3998, IEB, MEXU). Gro (Rhymes & Rowell 3874B, MICH, US). Hgo (Croat & Hannon 65980, UC). Mor (Lorence 5035, MEXU, TEX). Nay (McVaugh 18808, IEB, MICH). NL (Dorr 2591, TEX, UC). Oax (Yatskievych 85-125 et al., UC). Pue (Sánchez 655, MEXU, US). Qro (Rzedowski 48438, IEB, XAL). SLP (Duncan 2409, UC). Tab (González 17140, UC). Tam (Palmer 183, NY, UC, US). Ver (Harriman 15662, UC).
Unverified, Doubtful, or Mistaken Reports. Méx (Luján 5 and Tejero-Díez 2670, 2755, IZTA, cited by Tejero-Díez & Arreguín-Sánchez, 2004; the specimens are, however, T. puberula var. puberula).
McVaugh 18809 (MICH) from Nayarit, was cited by Mickel (1992) as T. puberula var. puberula, but this number at IEB is T. ovata var. lindheimeri. It is unusual in having large (3 X 1 cm) pinnatifid auricles at the bases of the proximal pinnae. Thelypteris ovata var. lindheimeri is most similar to T. puberula, but differs in the more elongate proximal segments of the proximal pinnae, longer and stiffer hairs on costae abaxially, lighter-colored and longer scales on the rachises and costae abaxially, and submarginal sori. Apparently, it also differs in chromosome number. Variety ovata is known from the southeastern United States and Bahamas; it is based on Thelypteris ovata R. P. St. John in Small, Ferns S.E. States 239, cum tab. 1938 [syns.: Dryopteris ovata (R. P. St. John) Broun, Ind. N. Amer. Ferns 76. 1938. Christella ovata (R. P. St. John)A. Löve & D. Löve, Taxon 26: 326. 1977. Type. U.S.A. Florida: Citrus Co., Lecanto, R. St. John [394] (NY!)].A