title: [Architecture and leaf anatomy of the Polypodium plesiosorum sensu Moran complex (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.
authors.affiliation: Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Unidad de Morfología y Función, Av. de los Barrios 1, Los Reyes Iztacala, Tlalnepantla 54090, Edo. México, México, Apdo. Postal 314. tejero@unam.mx
authors.forename: J Daniel
authors.initials: JD
authors.lastname: Tejero-Díez
authors.forename: Silvia
authors.initials: S
authors.lastname: Aguilar-Rodríguez
authors.forename: Teresa
authors.initials: T
authors.lastname: Terrazas
authors.forename: Leticia
authors.initials: L
authors.lastname: Pacheco
mesh_terms: D008800:Mexico; D018515:Plant Leaves / Q000033:anatomy & histology*; D032494:Polypodium / Q000033:anatomy & histology* / Q000145:classification