Fig. 1

The flower basic structure diagram of I. morsei. (a): Ap: Anterior petal, Ls: Lateral sepal, An: Androecium, Wp: wing petal, G: Gynoecium, Ps: Posterior sepal. (b): VV: vexilla variegation; VNV: vexilla non-variegation; UWV: upper wing variegation; UWNV: upper wing non-variegation; IW: inferolateral wing;.