Arquitectura y anatomía foliar del complejo Polypodium plesiosorum sensu Moran (Polypodiaceae)

Abstract

Architecture and leaf anatomy of the Polypodium plesiosorum sensu Moran complex (Polypodiaceae). The Polypodium plesisorum complex is a heterogeneous morphology group. We studied leaf architecture and anatomy of 12 species of this group, in addition to other 23 species of Polypodium (P. dulce, P. polypodioides and P. vulgare complex sensu Moran) and related genera (Goniophlebium, Phlebodium, Pleopeltis, Serpocaulon, Synammia), for comparative purposes. Two homogeneous groups of species were established in P. plesiosorum complex. One of them is recognized based on the type of anastomosis of the veins (Type III): Polypodium conterminans (originally considered in the group of P. dulce with free venation by Moran), P. hispidulum, P. plesiosorum and P. rhodopleuron. The second group with Polypodium arcanum, P. castaneum, P. colpodes, P. eatonii, and P. flagellare were recognized based on the type of anastomosis of the veins (Type IV) and how vascular strands fuse along the petiole-leaf rachis. Characters studied helped to group the remaining species with other groups outside the complex under study. Rev. Biol. Trop. 58 (3): 955-976. Epub 2010 September 01.

Pleopeltis (Polypodiaceae), a redefinition of the genus and nomenclatural novelties

“…With existing evidence from both morphology and molecular data, some of these genera can be maintained in their approximate original circumscription, e.g., Synammia (Schneider et al, 2006) and Serpocaulon ; while others contain heterogeneous elements, e.g., Polypodium (Hennipman et al, 1990), or are not monophyletic. Sometimes, the evidence for polyphyly has come through examination of morphological characters (Tejero-Díez, 2005;Tejero-Díez et al, 2010); other evidence has accumulated as a result of cytological studies, especially the discovery of intergeneric hybrids (Gómez-Pignataro, 1975;Wagner and Wagner, 1975;Anthony and Schelpe, 1985;Mickel and Beitel, 1987) that contraindicate current taxonomic circumscriptions. Additional evidence derives from recent molecular studies (e.g., Schneider et al, 2004;Otto et al, 2009;Sprunt et al, 2011).…”

Leaf dimorphism of <i>Microgramma squamulosa</i> (Polypodiaceae): a qualitative and quantitative analysis focusing on adaptations to epiphytism

“…The anomocytic stomatal complex of M. squamulosa was also found in various Polypodium species studied by Tejero-Díez et al (2010), another genus of Polypodiaceae. However, this is not a pattern of this family, since Tejero-Díez et al (2010) also registered other stomatal complexes and Sen & De (1992) emphasized that the variability of types is common in ferns.…”

“…However, this is not a pattern of this family, since Tejero-Díez et al (2010) also registered other stomatal complexes and Sen & De (1992) emphasized that the variability of types is common in ferns.…”

“…Tejero-Díez et al (2010) observed the presence of a hypodermis in the leaves of Polypodium species (Polypodiaceae). In epiphytic angiosperms, NogueraSavelli & Jáuregui (2011) also reported the occurrence of hypodermis in only four of 11 analyzed species of Orchidaceae.…”

“…(Dryopteridaceae) and by Hernández et al (2008) with species of Cheilanthes Sw. (Pteridaceae). Tejero-Díez et al (2010) compared anatomically the Polypodium plesiosorum sensu Moran (Polypodiaceae) group, in order to identify taxonomic characteristics. However, most studies have been focused on epiphytic angiosperms (Zanenga-Godoy & Costa 2003, Proença & Sajo 2007, Noguera-Savelli & Jáu-regui 2011.…”