Desarrollo de los verticilos sexuales de Vanroyenella plumosa Novelo & Philbrick (Podostemaceae) Authors: Murguía Sánchez, Guillermina, Novelo R., Alejandro, Philbrick, C. Thomas, Márquez Guzmán, G. Judith

First record of Desmopsis trunciflora (Schlecht. & Cham.) G. E. Schatz (Annonaceae) for western Mexico and an analysis of its population in the Sierra de Manantlán, Jalisco Authors: Cuevas Guzmán, Ramón, López-Mata, Lauro, García Moya, Edmundo

Senecio inaequidens DC. (Compositae, Senecioneae), a noxious weed introduced to Mexico Authors: Rzedowski, Jerzy, Vibrans, Heike, Calderón de Rzedowski, Graciela

Morphological and anatomical variation in Mexican populations of Pseudotsuga (Pinaceae) Authors: Reyes Hernández, Valentín J., Hernández, J. Jesús, López Upton, Javier, Vaquera Huerta, Humberto

Inventory of taxonomic knowledge, as well as of regional diversity and endemism of Mexican species of Bursera (Burseraceae) Authors: Rzedowski, Jerzy, Medina Lemos, Rosalinda, Calderón de Rzedowski, Graciela

Las colecciones de hongos en México y su problemática en la biodiversidad del país Authors: GASTON GUZMAN HUERTA

NOTA SOBRE LA DISTRIBUCIÓN GEOGRÁFICA Y MORFOLOGÍA DE MANFREDA INVOLUTA (AGAVACEAE) Authors: AARON RODRIGUEZ CONTRERAS, Pablo Carrillo Reyes, ARTURO CASTRO CASTRO

“…Como resultado de recientes colectas botánicas en el occidente de México, se amplía la distribución geográfica conocida y se complementa la descripción morfológica de Manfreda involuta, una especie endémica del occidente de México.…”

Pollen viability in a cultivated sunflower line, in the wild sunflower (Helianthus annuus L. ssp. texanus Heiser) and in its hybrid offspring Authors: Mendoza Villarreal, Rosalinda, Reyes-Valdés, M. Humberto, Espinosa Zapata, Carlos, Villarreal Quintanilla, José Ángel

Structure and floristic composition of the savannahs of the Nizanda region, Isthmus of Tehuantepec (Oaxaca), Mexico Authors: López-Olmedo, Liliana I., Pérez-García, Eduardo A., Meave, Jorge A.

Bloom of Peridinium quinquecorne abé in la Ensenada de la Paz, Gulf of California (july 2003) Authors: Gárate-lzárraga, Ismael, Muñetón-Gómez, María del Socorro

Protoperidinium bergh (Dinophyceae) of the National Park Sistema Arrecifal Veracruzano, Gulf of Mexico, with a key for identification Authors: Okolodkov, Yuri B.

Is Annona lutescens a synonym of A. reticulata (Annonaceae)? Use of geometric morphometric and coloration data to solve this controversy Authors: Ocampo, Gilberto, Castro-Moreno, Marisol

Taxonomic revision of Salvia subgenus Calosphace section Scorodoniae (Lamiaceae), endemic to Mexico Authors: Olvera Mendoza, Edgar Ismael, Bedolla García, Brenda Y., Lara Cabrera, Sabina I.

New records of Hypocreales (Sordariomycetes, Ascomycota) of the cloud forest from the Sierra Alta Hidalguense in Mexico Authors: Raymundo, Tania, Escudero-Leyva, Efraín, Soto-Agudelo, Ricardo, García-Jiménez, Jesus, Romero-Bautista, Leticia, Valenzuela, Ricardo

Additions to the orchid flora of Tabasco, Mexico Authors: González-Aguilar, Marlon Aramis, Burelo-Ramos, Carlos Manuel

A new species of Muhlenbergia (Poaceae, Chloridoideae, Cynodonteae) from the state of Guerrero, Mexico Authors: Vigosa-Mercado, José Luis, Fonseca Juárez, Rosa María

Macroalgae of the lagoon of “El Carmen”, Tabasco, Mexico Authors: Pérez Jiménez, Graciela María, Rivas-Acuña, Ma. Guadalupe, León Álvarez, Daniel, Campos Campos, Bernardita, Quiroz-González, Nataly

First record of Unguiculariopsis ravenelii (Leotiomycetes, Ascomycota) from Mexico Authors: Raymundo, Tania, Martínez-Pineda, Michelle, Cobos-Villagrán, Aurora, Sánchez-Flores, Marcos, Valenzuela, Ricardo

A reassessment of Mappia (Icacinaceae) taxonomy using environmental data Authors: Duno de Stefano, Rodrigo, Loera, Israel, Angulo, Diego Francisco

Anthropogenic perturbation effects on tropical-forest hammock ecosystems in Campeche, Mexico Authors: Koyoc-Ramírez, Luz Gabriela, Mendoza-Vega, Jorge, Pérez Jiménez, Juan Carlos, Torrescano Valle, Nuria