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Fig. 4 | BMC Plant Biology

Fig. 4

From: Unidirectional transitions in nectar gain and loss suggest food deception is a stable evolutionary strategy in Epidendrum (Orchidaceae): insights from anatomical and molecular evidence

Fig. 4

Evolution of nectar presence in 47 Epidendrum species based on maximum likelihood. From an ancestor with nectar, rewardless species evolved at least ten times in different clades. Maximum likelihood reconstruction of ancestral states over 100,000 chronograms are summarized on the maximum-clade credibility chronogram. Pie charts at selected nodes summarize the results of the maximum likelihood character optimization analyses. Each chart shows the percentage of trees ≥90% for nectar presence (yellow) or nectar absence (red). Rectangles at branch tips indicate the presence (yellow) or absence (red) of nectar. The group Amphyglottium is highlighted in orange. Asterisks indicate species in which nectar presence/absence was inferred in the present study using anatomical analyses

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