El género Paspalum L. (Paspaleae, Poaceae) en la Península de Yucatán, México

Abstract

Aguascalientes, Aguascalientes, México. 5 Autor para la correspondencia: odiaz@uady.mx RESUMEN En este estudio se llevó a cabo una sinopsis del género Paspalum L. en la Península de Yucatán, México. Se reconocen 23 especies en el área de estudio, se proporcionan claves de identificación, descripciones morfológicas, mapas de distribución, así como información acerca de su fenología, hábitat y distribución. Se reconocen dos especies endémicas de la Península de Yucatán, P. mayanum y P. sparsum, localizadas en áreas abiertas de la selva baja caducifolia.Palabras clave: Campeche, clave de identificación, endemismo, gramíneas, Quintana Roo, taxonomía, Yucatán. ABSTRACTIn this study, a synopsis of Paspalum L. was performed in the Yucatan Peninsula, Mexico. Twenty-three taxa are recognized in the study area, identification keys are provided, as well as morphological descriptions, distribution maps, habitat, phenology and distribution data. Two endemic species are recognized for the Yucatan Peninsula, P. mayanum and P. sparsum, which are found in open areas of tropical deciduous forest.

Taxonomic Revision of Paspalum Group Caespitosa (Poaceae, Panicoideae, Paspaleae)

“…7). In the Caribbean, P. blodgettii also occurs on the Windward Islands (Ortiz-Díaz et al, 2015), and in Mexico there are reports of this species in the states of Chiapas, Guerrero, Oaxaca, Tamaulipas, and Veracruz (Sánchez-Ken, 2018). Paspalum blodgettii is frequently found in swamps, moist, sandy, open, and brushy calcareous soils of rainforests, secondary forests, savannas, coastal, burned, and disturbed areas, grasslands, under full or partial shade, on coral limestone slopes, among limestone boulders, and along roads.…”

“…9). In Mexico, P. caespitosum also occurs in the states of Oaxaca and Querétaro (Sánchez-Ken, 2018), in the Caribbean, there are registers of this species in the Cayman Islands, Leeward Islands, and Windward Islands ( Lindeman & Stoffers, 1963, Pohl & Davidse, 1994, Ortiz-Díaz et al, 2015, and in the United States P. caespitosum also occurs in Alabama and Hawaii (Ortiz-Díaz et al, 2015). Paspalum caespitosum grows in partly shaded humus in limestone or rocky soils, sometimes in sandy pinelands, in tropical deciduous, low semi-deciduous, or lower montane rainforests, on steep slopes, in crevices of rocks on wooded knolls, on level slopes of cliffs, in opening forests, in shade of trees, and along clearings, trails, forest edges, rocky outcrops with scrubs, bases of hills, savannas, roadsides, and disturbed areas.…”

“…21). In Mexico, this species also occurs in the states of Campeche, Chiapas, Colima, Jalisco, Sinaloa, and Tabasco (Sánchez-Ken, 2010; Ortiz-Díaz et al, 2015). Paspalum ligulare is non-specific to habitat preferences.…”

Gypsophily in tropical environments: a case study in the Yucatan Peninsula

“…Among the 148 gypsovags, 37 are confirmed as gypsovags based on botanical criteria and reports that they either grow on gypsum mines, gypsum outcrops, or in habitats that include gypsum environments (Cervantes-Maldonado et al 2001; Martínez & Galindo-Leal 2002; Ortiz-Díaz et al 2015; Powell 1978). The remaining 111 are probable gypsovags based on literature reports (25 spp.…”

Ophioglossum nudicaule (Ophioglossaceae) y Paspalum serpentinum (Poaceae), dos nuevos registros para la península de Yucatán, México

“…La presencia de Ophioglossum nudicaule es el primer registro del género y la familia en la región, incrementando la riqueza a 17 familias, 34 géneros y 67 especies de Pteridofitas, mientras que P. serpentinum incrementa a 24 especies la riqueza de Paspalum en la flora peninsular (Carnevali Fernández-Concha et al, 2010;Ortiz-Díaz et al, 2015). Ambas especies son de hábitats muy húmedos a parcialmente inundables.…”