Microgramma mortoniana de la Sota

Yañez, A., Marquez, G. J., Berrueta, P. C. & García, R. A., 2021, An urban fern refugium: Municipal Ecological Reserve of Avellaneda (Eco Área) (Buenos Aires, Argentina), Blumea 66 (3), pp. 227-235 : 232

Microgramma mortoniana de la Sota — Fig. 3f

Origin — Native. Mainly found in southern South America, where it is distributed in Uruguay, Paraguay and Brazil. In Argentina it is associated with humid forests in the northeast (Cor- rientes and Misiones), northwest (Jujuy, Salta and Tucumán) and in riparian forests in Buenos Aires.

Habitat & Ecology — Epiphyte. It can grow under different conditions of solar radiation and on different substrates such as living trees, fallen trunks from the understory, supporting structures of woody origin or, occasionally, walls of old buildings ( García & Rosato 2011). Plasticity for the colonization of different substrates could be related to the presence of vegetative reproduction buds associated with gametophytes ( Gorrer et al. 2018).

Location within the reserve — It was found growing on Erythrina crista-galli , always exposed to direct sunlight.

Observations — It could be identified from its dimorphic to hemidimorphic fronds, ovate lamina scales with a markedly ciliate margin and rhizome scales with a slightly ciliate margin.

Illustration and morphological description reference — Cacharani & Martínez (2016).

Studied specimens. ARGENTINA, Buenos Aires,Mun.Avellaneda, Reserva Ecológica Municipal de Avellaneda (Eco Área), Yañez et al. 481 (BA), 18- IX-2018 ; Yañez et al. 571 (BA, LP), 22-XII-2020 .