图3. 被子植物蜜距在目一级的系统发育分布。系统树根据Angiosperm phylogeny poster (APP)—Flowering plant systematics, 2019绘制(Cole et al., 2019)。线描图红色部分为蜜距所在位置。植物科和蜜距类型所附括号内为距长变异系数和样本量。两列箱型图分别为17个科和6种蜜距类型的蜜距长度log值(平均值±标准差)。

Fig. 3. Distribution of nectar spur types across angiosperm orders. The phylogeny of angiosperm orders is drawn according to the Angiosperm phylogeny poster (APP)—Flowering plant systematics, 2019 (Cole et al., 2019). The red parts of the line diagrams show the location of the nectar spurs. Coefficient of variation of spur length and sample size are enclosed in parentheses for plant families and nectar spur types. The log values (mean ± SD) of spur length for 17 families and 6 types of nectar spur are shown in the two box plots.