| Table of contents Act. Bot. Mex n.97 Pátzcuaro Oct. 2011 Semblanza. Raymundo Ramírez Delgadillo (1963-2011) Pérez de la Rosa, Jorge A.; Vargas Amado, Georgina; Hernández López, Leticia; Trigueros Bañuelos, Azucena Gabriela
| | A new species of Viguiera (Compositae, Heliantheae) from the state of Queretaro (Mexico) Rzedowski, Jerzy; Calderón de Rzedowski, Graciela
| | 2-Phenylethanol in the leaves of Bursera velutina Bullock (Burseraceae) Noge, Koji; Lawrence Venable, D.; Becerra, Judith X.
| | Lophiaris tapiae, a new species of the Lophiaris oerstedii complex (Orchidaceae) from the Yucatan Peninsula, Mexico Balam, Ricardo; Carnevali, Germán; Cetzal -Ix, William; Duno, Rodrigo
| | A new species of Mimulus L. (Section Simiolus, Phrymaceae) from northeastern Michoacan, Mexico Pérez -Calix, Emmanuel; Zamudio, Sergio
| | Heliopsis suffruticosa (Compositae, Heliantheae), a new species from western Zacatecas Ramírez -Noya, David; González -Elizondo, M. Socorro; Molina -Torres, Jorge
| | New combinations in Orchidaceae of Mexico Solano, Rodolfo; Salazar, Gerardo A.; Jiménez, Rolando
| | Two new species of Perymenium (Compositae-Heliantheae) from central Mexico Rzedowski, Jerzy; Calderón de Rzedowski, Graciela
| | Phenotypic variation and leaf fluctuating asymmetry in natural populations of Parrotia persica (Hamamelidaceae), an endemic species from the Hyrcanian forest (Iran) Sattarian, Ali; Akbarian, Mohammad Reza; Zarafshar, Mehrdad; Bruschi, Piero; Fayyaz, Payam
| | A new species of Mammillaria (Cactaceae) from Tamaulipas, Mexico Martínez -Ávalos, José Guadalupe; Golubov, Jordan; Arias, Salvador; Villarreal-Quintanilla, José Ángel
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