Fig. S1 Patterns of first flowering dates for Konza herbaceous flora partitioned by flowering color and expressed as a fraction of all recorded species flowering per d or number of species flowering per d.

Fig. S2 Phylogenetic distribution of first flowering dates (FFDs) for angiosperm species at Konza.

Fig. S3 Relationships between first flowering dates and foliar carbon and nitrogen isotope ratios.

Table S1 Species sampled in the study along with their functional group, whether the species are native or not, and their photosynthetic pathway

Notes S1 Results and details on methods of analysis for the relationships between flowering phenology and species geographic climate envelopes, flowering color, phylogenetic patterns, and foliar C and N isotope ratios.

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