Figure 1

Distribution of flower aesthetic traits in P. Intermedia (a–l). For flower: a, e, I, m; for sepal: b, f, j, n; for petal: c, g, k, o; for lip: d, h, l, p. The aesthetic traits of width (a–d), length (e–h), and area (i–l). Frequency distribution of flower color-related traits in P. Intermedia (m–p). The color-related traits are magenta area in petal (m), magenta color in petal (n), red color in lip (o), and yellow color in lip (p).