| Table of contents Act. Bot. Mex n.82 Pátzcuaro Jan. 2008 Palabras del editor Rzedowski, J.
| | Notes on neophytes 4. Polygonum nepalense (Polygonaceae), an invasive plant new for Mexico Vibrans, Heike; Hanan Alipi, Ana María
| | Aristolochia emiliae (Aristolochiaceae: subsection Pentandrae) a new species from the coast of Jalisco, Mexico Santana-Michel, Francisco J.; Solís-Magallanes, José Arturo
| | Synopsis of Scirpus s.l. (Cyperaceae) for Mexico González Elizondo, M. Socorro; González Elizondo, Martha; Tena Flores, Jorge A.; López Enriquez, I. Lorena; Reznicek, Anton A.; Diego-Pérez, Nelly
| | Changes in the structure of the epiphytic diatom assemblage of Macrocystis pyrifera (L.) C. Ag. Argumedo Hernández, Uri; Siqueiros Beltrones, David. A.
| | Manfreda bulbulifera (Agavaceae), a new species from Mexico Castillejos-Cruz, Carlos; Solano, Eloy
| | Two new species of Bursera (Burseraceae) from the states of Guerrero, Michoacán and Oaxaca (Mexico) Rzedowski, Jerzy; Calderón de Rzedowski, Graciela
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