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Table 5 Camparison of Begonia montaniformis with B. ferox and B. nahangensis

From: Six new species of Begonia (Begoniaceae) from limestone areas in Northern Vietnam

  B. montaniformis B. ferox B. nahangensis
Leaf    
 Bullae 2–4-tipped Uni-tipped Uni-tipped
 Color Silvery green along primary and secondary veins against blackish-malachite green background Embellished dark maroon against green background Embellished dark maroon against green background
Inflorescence    
 Peduncle length (cm) 11–26 5–13 (8) 10–12 (14)
Male flower    
 Tepal color Yellowish to pinkish-green Pale pinkish-yellow White to light pink
Female flower    
 Tepal color Yellowish-greenish Pinkish-white Light olive-green
 Tepal duration Persistent Deciduous Unknown
Capsule    
 Abaxial wing Oblique-triangular Crescent-shaped Oblique-triangular