Leticia Pacheco

Monograph of the neotropical species of Callipteris with anastomosing veins (Woodsiaceae)

Callipteris is a pantropical fern genus defined by two synapomorphies of its rhizome scales: 1) dark-castaneous to black borders, and 2) bifid marginal teeth. This monograph treats 15 neotropical species ofCallipteris that are further defined by the synapomorphy of anastomosing veins (free-veined species of the genus occur in the Neotropics and elsewhere). Three species are newly described here; the remaining 12 were previously classified inDiplazium. All the species ofCallipteris grow on wet forest floors at 100–2300 m. In the Neotropics the genus occurs from Guatemala to Bolivia, northern Brazil, and the Lesser Antilles. It has two centers of species richness. The first is the Chocó region on the western side of the Andes in Colombia and northwestern Ecuador. This region contains eight species, five of which are endemic. The second center is the mountains of Costa Rica and Panama, where six species occur, three of which are endemic. Only one species, an endemic, occurs in the Lesser Antilles in Martinique, St. Vincent, and Grenada. Four species occur only on the eastern side of the Andes, and these apparently represent at least two separate dispersal events from the western side of the Andes.ResumenCallipteris es un género de helecho pantropical se define por los dos siguientes sinapomorfias de las escamas del rizoma: 1) márgenes oscuro-castañeo a negro, y 2) dientes marginales bífidos. Esta monografía se trata las 15 especies neotropicales deCallipteris que son definidas además por la sinapomofía de nervaduras anastomosadas (especies con nervaduras libres existen también en el Neotrópico y otros lugares). Tres de las especies son descritas como nuevas y 12 especies se encontraban clasificadas enDiplazium. Todas las especies deCallipteris viven en bosques húmedos desde 100 a 2300 m. En el Neotrópico, el género se presenta desde Guatemala hasta Bolivia, norte de Brasil y Antillas Menores. Tiene dos centros de diversificación. La primera es la región Chocó en el lado occidental de los Andes en Colombia y el noreste de Ecuador. En esta región crecen ocho especies, de las cuales cinco son endémicas. El segundo centro es las montañas de Costa Rica y Panamá, en donde viven seis especies, tres de las cuales son endémicas. Una de las especies es endémica de las Antillas Menores, en Martinique, St. Vincent y Grenada. En el este de los Andes viven cuatro especies, aparentemente representan al menos dos eventos separados de dispersión desde el lado occidental de los Andes.

A new species of Diplazium (Woodsiaceae) from Ecuador

A new species ofDiplazium,D. lellingeri from Ecuador, is described and illustrated.ResumenSe describe e ilustra una nueva especie deDiplazium de Ecuador,D. lellingeri.

Palynology of Eleven Species of the Genus Tectaria Cav. (Tectariaceae-Polypodiaceae)

The genus Tectaria can be distinguished by its erect rhizomes, blades simple to mostly pinnatifid or 1-2pinnate, veins netted, often with free, included sometimes forked veinlets, sori abaxial and rounded to oblong, rarely the sporangial in continuous marginal coenosori [1]. It is a pantropical genus, about 230 species [2], mostly developed in Southeast Asia and adjacent Pacific islands; there are 25-30 species in America, mostly of South America. They generally live on limestone at low elevations, in wet forests.

A New Locality of Pleopeltis × sordidula (Maxon & Weath.) Mickel & Beitel in the State of Puebla, Mexico

A New Locality of Pleopeltis 3sordidula (Maxon & Weath.) Mickel & Beitel in the State of Puebla, Mexico.—During recent field work in the State of Puebla, Mexico, we found a specimen of Pleopeltis xsordidula (Maxon & Weath.) Mickel & Beitel (Fig. 1), which was previously known from Veracruz. An additional collection from Tlaxco, Tlaxcala was cited by Arreguin et al. (Polibotánica 17:39-43. 2004), but we could not see the specimen to verify it. This hybrid is believed to have originated from a cross involving P. astrolepis (Liebm.) E. Fourn. and P. fallax (Schltdl. & Cham.) Mickel & Beitel. Our finding of this hybrid was made at Municipio Cuetzalan, on the way to the cave of Atepolihui (L. Pacheco 3816 & A. Sánchez Morales, UAMIZ). The plant was growing in montane rain forest at 850 m as an epiphyte. Only one plant was found with old sporangia and few white spores. All morphological characters agreed with the isotype at US. Although the putative parents are P. astrolepis

Diplazium condorense (Athyriaceae), a new species from Ecuador

A new species ofDiplazium,D. condorense from Ecuador, with free veins and concolorous blade scales, is described and illustrated. It is apparently most closely related to species ofCollipteris, having anastomosing veins and scales with black margins and teeth.ResumenSe describe e ilustra una nueva especie deDiplazium de Ecuador,D. condorense con venas libres y escamas de la lámina concoloras. Aparentemente esta especie está más relacionada con las deCallipteris con venas anastomosadas y escamas con márgenes negros y dientes bifurcados.

Lectotypification of Several Names Currently Placed in Diplazium (Woodsiaceae)

Abstract Lectotypifications are made for the following names that apply to species of Diplazium in the Old World: D. atratum, D. conterminum, D. crinipes, D. megaphyllum, D. polypodioides var. vestitum, D. sechellarum, and D. sikkimense. The types of these names have scales with black borders and bifid marginal teeth, a scale type characteristic of the diplazioid segregate Callipteris.