Anathallis oblanceolata (L.O. Williams) Solano & Soto Arenas
Descripción
Rhizomatous, erect herb, up to 5 cm tall. Roots 0.6–1.0 mm diameter. Rhizome 4–7 mm long between adjacent stems, 1 mm diameter. Stems 2.5–10.0 mm long, 0.8–1.0 mm diameter, the annulus 1.5–3.0 mm below the apex. Leaf 18–45 × 4–7 mm, fleshy, oblanceolate, rounded, gradually attenuate toward the base into a conspicuous, channeled petiole. Inflorescence equal to or shorter than the leaf, 15–24 mm long; peduncle 6–13 mm long, 0.4–0.5 mm diameter, the base covered by a spathaceous bract up to 4 mm long, with 2 additional obliquely tubular, obtuse overlapping bracts, 1–2 mm long; rachis 5–8 mm long, with 2 successive flowers. Floral bracts 1.5–2.0 mm long, covered with reddish glandular-pilose trichomes. Flowers 3.7–5.0 mm high, 2 mm wide, sepals and petals bright yellowish, sometimes brownish purple tinged toward their apices and along the mid-vein, lip purple, column yellow, anther purple. Sepals conduplicate, 3-veined; dorsal sepal 4.5–5.0 × 1.5–1.8 mm, lanceolate, acute; lateral sepals 4.0–4.7 mm × 1.4–1.5 mm, lanceolate, oblique acute, shortly apiculate. Petals 3.0–3.8 mm × 0.7–0.9 mm, falcate-lanceolate, long acuminate, marginally erose-papillose, 1-veined. Lip 2.7–3.1 × 0.7–1.0 mm, entire, lanceolate-ligulate, rounded, 3-veined, glandular-postulate, longitudinally sulcate, with a basal low callus; the base with a pair of protuberances and a claw 0.3 × 0.3 mm. Column 1.7–2.4 mm long, 0.7–0.9 mm wide, wings oblong, marginally lacerate, clinandrium serrulate, foot column 0.6–0.7 mm long. Anther 0.8 mm long and wide, ovoid. Pollinia 0.8 mm long, longitudinally cleft. Ovary 0.8–1.5 mm long, pedicel 1.5–6.5 mm long. Capsule 7.5 mm long, 4.2 mm diameter.A
Forma de crecimiento
HierbaA
Forma de vida
EpífitaA
Nutrición
AutotróficaA
Floración
Aug–OctA
Ejemplar revisado
MEXICO. Estado de Mexico: Municipio Donato Guerra, D. Szeszko-Fabila s.n. (AMO[photo]!). Municipio Tenancingo, M. A. López s.n. (Amo[photo]!). Guerrero: municipio Chilpancingo de los Bravo, Omiltemi, G. Salazar s.n. (AMO photo!). Jalisco: municipio Tecalitlán, near Ciudad Guzmán, cañada del Laurel, cerro de La Ribera, 19 Sep. 1936, O. Nagel & J. Navarro sub. E. Östlund 6338 (AMES!, CAS! SEL!). Michoacan: municipio Erongarícuaro, en el pedregal de Tócuaro, 15 Oct. 1996, E. Pérez 3511 (IEB!), 22 Aug. 1997, E. Pérez 3694 (IEB!); Pedregal de Tócuaro, Municipio Pátzcuaro, near Patzcuaro, 6000 ft, cultivated in Cleremont, CA, 22 Feb. 1979, W. Gann s.n. (SEL!). Oaxaca: municipio San Jerónimo Coatlán, 7 km al NE del campamento maderero Cerro Sol brecha a Progreso, 6 Oct. 1988, A. Campos 2599 (MEXU!). Municipio Santa Catarina Lachatao, 26 Aug. 2017, J. Santiago s.n. (MEXU!). Puebla: Municipio Ayotoxco de Guerrero, 31 Aug. 2019, G. Salazar s.n. (MEXU!). Municipio Tetela de Ocampo, cañon de Escahuasco, 15 Oct. 1995, A. Espejo et al. 5366 (UAMIZ!). Veracruz: [municipio Totutla] Mirador, Huatusco, May 1878, Z. Kienast s.n. (W!).
Naturalista observations: MEXICO. Jalisco: Concepción de Buenos Aires, entre Concepción de Buenos Aires y los Aguares, 4 Aug. 2013, J. Moreno (https://www.naturalista.mx/observations/2867438). Oaxaca: Santa Catarina Lachatao, 15 Aug. 2018, B. Nuñez-Oberg (https://www. naturalista.mx/observations/15713121).A
Naturalista observations: MEXICO. Jalisco: Concepción de Buenos Aires, entre Concepción de Buenos Aires y los Aguares, 4 Aug. 2013, J. Moreno (https://www.naturalista.mx/observations/2867438). Oaxaca: Santa Catarina Lachatao, 15 Aug. 2018, B. Nuñez-Oberg (https://www. naturalista.mx/observations/15713121).A
Elevación
1100 – 2250 mA
Tipo de vegetación
Bosque de encino, Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
Sujeta a protección especial (Pr)A
Estatus del taxón
(A) Como definida actualmente, probablemente una entidad natural (monofilética)A
Discusión taxonómica
Anathallis oblanceolate is distinguished by its minute rhizomatous habit, oblanceolate, erect leaves with a well-defined petiole, floral bracts covered with reddish trichomes, and lip longer than the column. It is most similar to Anathallis minutalis, as was noted by Williams (1946, 1951). However, it differs by its creeping habit (vs. erect), orbicular-elliptic, subsessile, fleshy-thickened leaves (vs. oblanceolate, long petiolate, and fleshy leaves), ovate, acute dorsal sepal (vs. lanceolate, acute), ovatelanceolate lateral sepals (vs. lanceolate), and oblongpandurate, acute lip (vs. lanceolate-ligulate, rounded). This species was described in 1946 from a specimen collected in 1937 in Pluma Hidalgo, Oaxaca. However, the oldest known specimen dated almost seventy years earlier from Mirador, Veracruz, it was collected by Z. Kienast and is in W, where originally was labeled as Pleurothallis crassifolia and later as P. minutalis. This reflects that since the 19th century, there has been confusion in including specimens of what is now A. oblabcelata within A. minutalis. Luer (1975) mistakenly treated Pleurothallis oblanceolata as a synonym of P. minutalis; also, it appears that the Luer’s description for P. minutalis was based on a specimen of A. oblanceolata, as the accompanying illustration exhibits characteristics consistent with this species. This situation may have led to William’s plant being misidentified as A. minutalis, resulting in herbarium collections erroneously bearing this name (or one of its nomenclatural synonyms) for specimens that belong to A. oblanceolata. This also led to the inclusion of A. oblanceolata specimens in the description of A. minutalis in treatments by García et al. (2003) and Solano (2008a). A recent review of herbarium and alive material has allowed for the clear differentiation of the two species here. Anathallis oblanceolata was previously considered a micro-endemic species from Southern Oaxaca, where the original vegetation has been altered by agroecological practices, and it was known from only a few sightings. Consequently, it was included as a species at risk (SEMARNAT 2019) and considered as extinct in the wild by Soto-Arenas, Solano & Hágsater (2007).A