Fig 1.
Bayesian majority consensus tree of Primula based on the four DNA markers (ITS, matK, trnL-F and rps16) with main diagnostic characters (inflorescence types and calyx shape) mapped on.
Numbers before and after the slash on the branches are parsimony bootstrap values (≥ 50%) and Bayesian posterior probabilities (≥ 0.5), respectively. Clades A-D represent the monophyletic clade of P. sect. Carolinella. (A’) Inflorescence of P. chapaensis; (B’) Inflorescence of P. kwangtungensis; (C’) Inflorescence of P. calyptrate; (D’) Inflorescence of P. rugosa; (A”) Calyx of P. chapaensis; (B”) Calyx of P. kwangtungensis; (C”) Calyx of P. calyptrate; (D”) Calyx of P. rugosa.
Fig 2.
Primula undulifolia sp. nov. (A) Plant; (B) Short-styled Flower; (C) Long-styled Flower; (D) Calyx. Drawn by Yunxiao LIU, from the holotype.
Fig 3.
Primula undulifolia sp. nov. (A) Habit in Flowering; (B) Type Locality; (C) Calyx; (D) Pin and Thrum Flowers; (E) Leaf. Photographed by Yuan XU.
Fig 4.
Distribution of Primula undulifolia sp. nov. and other Chinese species of sect. Carolinella.