figure S3. Sugar concentrations in floral nectar from Low-level ethanol is widespread within floral nectar

Average sugar concentrations of floral nectar for 29 angiosperm species arranged according to phylogenetic relatedness [77]. Green branches on the phylogeny refer to monocot species, and orange branches refer to eudicot species. Groups of species are classified into clades as indicated by gray alternating with white shading, as labeled at the bottom of the chart. Boxplots are color-coded by the expected pollinator for that plant species, with corresponding animal silhouettes (from PhyloPic) at the phylogeny tips: purple = hummingbird-pollinated (trochilophily), green = sunbird-pollinated (nectariniophily), salmon = insect-pollinated (entomophily), and cyan = “other” (including chiropterophily, ornithophily, and general zoophily). A black dashed line demarcates the average sugar concentration of 23.4% among all species. Boxplots represent the 25th to 75th percentiles of the interquartile range (IRQ), a thick line color-coded line represents the median, and whiskers represent the minimum and maximum. The median, boxplot and whisker calculations exclude outliers, which are shown as points and represent ethanol values greater than the IRQ multiplied by 1.5, as added to the 75th percentile. Sample size (n) is indicated above each boxplot.