Pelazoneuron puberulum (Baker) A.R.Sm. & S.E.Fawc.
Descripción
Rhizomes long-creeping, stipe bases (0.5–)1–3 cm apart; fronds 35–120(–160) cm long; stipes equaling blades, 15–50(–80) cm X (2–)3–7 mm, paleate at bases, the scales hairy, not persistent; blades chartaceous to subcoriaceous, 20–55(–85) cm long, tapering evenly toward the pinnatifid apices, or abruptly reduced just below the somewhat elongate apices; rachises lacking scales or infrequently with a few persistent castaneous scales less than 1 mm long, also usually moderately hairy; pinnae 7–20(–26) X 0.9–2(–3) cm, proximal pair the largest, incised 0.5–0.8 the way to the costae, proximal several pairs narrowed toward their bases except for slightly enlarged entire acroscopic basal segments, basal basiscopic segment of distal pinnae strongly adnate to rachises; segments oblique, mostly 3–5 mm wide, subfalcate, acutish; veins 7–12(–15) pairs per segment, the proximal 1–2(–3) pairs from adjacent segments connivent at sinuses; indument abaxially on costae of a few minute castaneous scales less than 0.5 mm long, the costae, veins, and tissue between veins pubescent with hairs ca. 0.2 mm long, blades eglandular or sparsely glandular, adaxially the blades glabrous except along costae; sori medial, with indusia hairy, rarely glabrous or glabrescent; 2n=144, var. puberula (Oax, Chis).A
Forma de vida
TerrestreA
Elevación
100 – 2000 mA
Tipo de vegetación
Bosque de encino, Bosque de pino-encino, Selva medianaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
(In relation to the synonym Thelypteris puberula) This species hybridizes with T. albicaulis, which see. Vázquez T. 370 (XAL), from Veracruz, has strongly malformed spores and is, apparently, a hybrid involving this species; the specimen has glabrous indusia and sparsely hairy costae abaxially. Ventura A. 7781 (MEXU), also from Veracruz, has collapsed or empty sporangia or extremely malformed spores and is probably also of hybrid origin. Breedlove 33725 (DS), from Chiapas, has malformed spores and is the putative hybrid between T. puberula and T. tuerckheimii. Mickel 6204 (NY) has spores that are greater than 50 percent malformed, but its parentage (other than T. puberula) is not obvious.
Key to the Mexican Varieties of Thelypteris puberula
Adaxial blade surface glabrous, except for costae..........................................var. puberula
Adaxial blade surface bearing short, appressed hairs 0.1–0.2 mm long.......var. sonorensis
Pelazoneuron puberulum var. puberulum (Baker) A.R.Sm. & S.E.Fawc., Sida, Bot. Misc. 59: 64. 2021
Thelypteris puberula var. puberula (Baker) C.V.Morton, Amer. Fern J. 48(4): 138. 1958
Differing from var. sonorensis in having the adaxial blade surfaces, except for costae, glabrous.
Distribution. Oak and pine-oak woods, open stream banks, roadbanks; (100–)500–2600 m. Mexico; Guat, Hond, Salv, Nic, CR; Hisp.
Selected Specimens Examined. Chis (Palacios-Rios 2919, UC). Col (Sanders 10646, UC). Dgo (Benítez 1156, CHAPA, IEB). Gro (Mexia 8893, MICH, NY, UC, US). Gto (Rzedowski 41560, ENCB, IEB). Hgo (Rzedowski 25425, MICH). Jal (Sahagun 17263, UC). Méx (Matuda 27540, CAS, US). Mich (Díaz Luna 3219, UC). Mor (Yatskievych 86-315 & Gastony, UC). Nay (McVaugh 18809, MICH). Oax (Krueger & Gillespie 21, UC, US). Pue (Yatskievych 83-376, ARIZ, UC). Qro (Fernández N. & Acosta 2086, 2147, IEB). Sin (Rose et al. 14081, NY, US). Tam (Bartlett 10419, MEXU, MICH, US). Ver (Seaton 67, NY, US).
Unverified, Doubtful, or Mistaken Reports. Ags (De la Cerda & García 15, 280, HUAA, cited by Siqueiros-Delgado & González-Adame, 2004, but not verified). NL (reported by Aguirre-Claverán and Arreguín-Sánchez, 1988, but not verified and perhaps misidentified).
Thelypteris puberula var. puberula differs from other members of subg. Cyclosorus in Mexico by the combination of veins (1–3 pairs) running to the sinuses, presence of small costal scales abaxially, costae also hairy, tissue between veins glabrous adaxially (costae excepted), and pubescent indusia. A few specimens, especially from Veracruz, appear to be this species but have glabrous indusia and glabrous or sparsely hairy costae abaxially: Hernández A. & Figueroa N. 47 (XAL) and Galeotti 6311 (P, BR), both from Puente Nacional, the latter a syntype of Aspidium albicaule Fée; Nee & Taylor 29509 (XAL); Robles H. 47 (XAL). Mostly, these glabrous forms are from low elevation, 100–500 m. A similar specimen from Chiapas is Croat 40367 (MEXU), which has very large, glabrous indusia and moderately hairy costae; curiously it does not seem to produce sporangia! Another aberrant specimen from low elevation in Chiapas appears to lack costal scales: Davidse et al. 30094 (MEXU).
From T. grandis A. R. Sm., of the Antilles, Central America, and South America, T. puberula differs mainly by the shorter and narrower pinnae and more densely hairy blades abaxially.
Pelazoneuron puberulum var. sonorense (A.R.Sm.) A.R.Sm. & S.E.Fawc., Sida, Bot. Misc. 59: 64. 2021
Thelypteris puberula var. sonorensis A.R.Sm., Univ. Calif. Publ. Bot. 59: 91. 1971
U.S.A. Arizona: Pinal Co., Aravaipa Canyon, Galiuro Mts, Phillips 2877 & Reynolds (US).
Differing from var. puberula in having the adaxial blade surfaces between veins with short, appressed hairs 0.1–0.2 mm long.
Distribution. Terrestrial in moist ravines in pine-oak forests or tropical subdeciduous forests; 300–2000 m. Sw USA (Calif, Ariz); Mexico.
Selected Specimens Examined. BCN (Charlton 1338, UC). BCS (Moran 18194, UC). Chih (Palmer 161, US). Col (Orcutt 4590, US). Dgo (Palmer 1241⁄2, NY, US). Gto (Kennoyer 2245, US). Jal (Díaz L. 5479, UC). Mich (Hinton 16284, LL, MICH, NY, UC). Nay (Jones 23491, NY, UC). SLP (Schaffner s.n., in 1879 and 1881, NY). Sin (Rose et al. 14864, US). Son (Sanders 13084 et al., UC).
McVaugh & Koelz 1756 (MEXU), from Jalisco, 300 m (unusually low for this species and variety), is aberrant in having thin blade texture, deeply incised pinnae (nearly to costae), and absence of costal scales abaxially. Assignment to var. sonorensis is somewhat uncertain.A
Key to the Mexican Varieties of Thelypteris puberula
Adaxial blade surface glabrous, except for costae..........................................var. puberula
Adaxial blade surface bearing short, appressed hairs 0.1–0.2 mm long.......var. sonorensis
Pelazoneuron puberulum var. puberulum (Baker) A.R.Sm. & S.E.Fawc., Sida, Bot. Misc. 59: 64. 2021
Thelypteris puberula var. puberula (Baker) C.V.Morton, Amer. Fern J. 48(4): 138. 1958
Differing from var. sonorensis in having the adaxial blade surfaces, except for costae, glabrous.
Distribution. Oak and pine-oak woods, open stream banks, roadbanks; (100–)500–2600 m. Mexico; Guat, Hond, Salv, Nic, CR; Hisp.
Selected Specimens Examined. Chis (Palacios-Rios 2919, UC). Col (Sanders 10646, UC). Dgo (Benítez 1156, CHAPA, IEB). Gro (Mexia 8893, MICH, NY, UC, US). Gto (Rzedowski 41560, ENCB, IEB). Hgo (Rzedowski 25425, MICH). Jal (Sahagun 17263, UC). Méx (Matuda 27540, CAS, US). Mich (Díaz Luna 3219, UC). Mor (Yatskievych 86-315 & Gastony, UC). Nay (McVaugh 18809, MICH). Oax (Krueger & Gillespie 21, UC, US). Pue (Yatskievych 83-376, ARIZ, UC). Qro (Fernández N. & Acosta 2086, 2147, IEB). Sin (Rose et al. 14081, NY, US). Tam (Bartlett 10419, MEXU, MICH, US). Ver (Seaton 67, NY, US).
Unverified, Doubtful, or Mistaken Reports. Ags (De la Cerda & García 15, 280, HUAA, cited by Siqueiros-Delgado & González-Adame, 2004, but not verified). NL (reported by Aguirre-Claverán and Arreguín-Sánchez, 1988, but not verified and perhaps misidentified).
Thelypteris puberula var. puberula differs from other members of subg. Cyclosorus in Mexico by the combination of veins (1–3 pairs) running to the sinuses, presence of small costal scales abaxially, costae also hairy, tissue between veins glabrous adaxially (costae excepted), and pubescent indusia. A few specimens, especially from Veracruz, appear to be this species but have glabrous indusia and glabrous or sparsely hairy costae abaxially: Hernández A. & Figueroa N. 47 (XAL) and Galeotti 6311 (P, BR), both from Puente Nacional, the latter a syntype of Aspidium albicaule Fée; Nee & Taylor 29509 (XAL); Robles H. 47 (XAL). Mostly, these glabrous forms are from low elevation, 100–500 m. A similar specimen from Chiapas is Croat 40367 (MEXU), which has very large, glabrous indusia and moderately hairy costae; curiously it does not seem to produce sporangia! Another aberrant specimen from low elevation in Chiapas appears to lack costal scales: Davidse et al. 30094 (MEXU).
From T. grandis A. R. Sm., of the Antilles, Central America, and South America, T. puberula differs mainly by the shorter and narrower pinnae and more densely hairy blades abaxially.
Pelazoneuron puberulum var. sonorense (A.R.Sm.) A.R.Sm. & S.E.Fawc., Sida, Bot. Misc. 59: 64. 2021
Thelypteris puberula var. sonorensis A.R.Sm., Univ. Calif. Publ. Bot. 59: 91. 1971
U.S.A. Arizona: Pinal Co., Aravaipa Canyon, Galiuro Mts, Phillips 2877 & Reynolds (US).
Differing from var. puberula in having the adaxial blade surfaces between veins with short, appressed hairs 0.1–0.2 mm long.
Distribution. Terrestrial in moist ravines in pine-oak forests or tropical subdeciduous forests; 300–2000 m. Sw USA (Calif, Ariz); Mexico.
Selected Specimens Examined. BCN (Charlton 1338, UC). BCS (Moran 18194, UC). Chih (Palmer 161, US). Col (Orcutt 4590, US). Dgo (Palmer 1241⁄2, NY, US). Gto (Kennoyer 2245, US). Jal (Díaz L. 5479, UC). Mich (Hinton 16284, LL, MICH, NY, UC). Nay (Jones 23491, NY, UC). SLP (Schaffner s.n., in 1879 and 1881, NY). Sin (Rose et al. 14864, US). Son (Sanders 13084 et al., UC).
McVaugh & Koelz 1756 (MEXU), from Jalisco, 300 m (unusually low for this species and variety), is aberrant in having thin blade texture, deeply incised pinnae (nearly to costae), and absence of costal scales abaxially. Assignment to var. sonorensis is somewhat uncertain.A