## 3 Results
### Palynological Analysis
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Author** & **Year** & **State** & **Method** & **Contribution** \\ \hline
[24] & 1966 & San Luis Potosi & Field observations & Determined the nectariferous and polliniferous flora of the region. \\ \hline
[25] & 1972 & México & Field observations &
\begin{tabular}{c} Contributed to the knowledge of the national MF, \\ mentioning the most useful plants for bees. \\ \end{tabular} \\ \hline
[26] & 1980 & Morelos & Field observations & List of mellifera flora through field observations. \\ \hline
[39] & 1981 & Yucatan & Field observations & List of mellifera flora through field observations. \\ \hline
[40] & 1984 & Veracruz & Field observations & List of mellifera flora through field observations. \\ \hline
[41] & 1998 & Yucatan & Field observations & List of mellifera flora through field observations. \\ \hline
[42] & 1999 & Michoacan & Field observations & List of mellifera flora through field observations. \\ \hline
[43] & 2002 & Chiapas & Field observations & List of mellifera flora through field observations. \\ \hline
[44] & 2002 & Guerrero & Field observations & List of mellifera flora through field observations. \\ \hline
[45] & 2003 & Veracruz & Field observations & List of mellifera flora through field observations. \\ \hline
[46] & 2003 & Tamaulipas & Field observations & List of mellifera flora through field observations. \\ \hline
[7] & 1998 & Colima &
\begin{tabular}{c} Collection and observation of \\ species visited by bees as well \\ as pollen analysis of honey; \\ information verified by \\ interviews with beekeepers \\ \end{tabular} & List of mellifera flora through field observations. \\ \hline
[47] & 2007 & México & Palynological analysis & Fifteen families identified that match the vegetation of the area. \\ \hline
[48] & 2008 & Morelos & Palynological analysis & Twenty-four families identified of which only seven plant species belonging to four families were of importance. \\ \hline
[49] & 2010 & Yucatan & Palynological analysis & A total of 168 honey samples from the Yucatan Peninsula were analyzed, and it was determined that most of them were monofloral. \\ \hline
[26] & 2011 & Zacatecas & Palynological analysis & Honey samples from different municipalities were analyzed and the Asteraceae family was determined as the main pollen type. \\ \hline
[17] & 2012 & Tabasco & Palynological analysis & Forty honey samples from different beekeeping regions of Tabasco were analyzed, and it was observed that the use of floral resources was homogeneous. \\ \hline
[37] & 2016 & Guerrero & \
\begin{tabular}{c} Palynological and \\ molecular analysis \\ \end{tabular} &
\begin{tabular}{c} It was determined that the stratum most used by _Apis_ \\ _ mellifera_ was the herbaceous stratum, followed by the shrub and tree strata. \\ \end{tabular} \\ \hline
[36] & 2017 & Durango & Palynological analysis & A wide variety of flowers used by _Apis mellifera_ was identified, including _Prosopis laevis_. \\ \hline
[50] & 2017 &
\begin{tabular}{c} Baja \\ California Norte \\ \end{tabular} & Palynological analysis & It was determined that the floral resources change according to the seasons. \\ \hline
[33] & 2018 & Puebla & Palynological analysis & It was determined that the Asteraceae family is the main food source and the grazing habits were determined, exhibiting a polylectic habit. \\ \hline
[51] & 2019 & Campeche & \
\begin{tabular}{c} Interviews with beekeepers as \\ well as reviews in \\ specialized herbaria \\ \end{tabular} &
\begin{tabular}{c} Highlighted the importance of indigenous knowledge \\ by revealing species that promote sustainable \\ development within the communities that \\ practice beekeeping. \\ \end{tabular} \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Achievements and scope of MF studies in different Mexican states.