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Table 2 Comparison of Begonia ferox with B. nahangensis

From: Novelties in Begonia sect. Coelocentrum: B. longgangensis and B. ferox from limestone areas in Guangxi, China

  Begonia ferox(Figure5 and6) Begonia nahangensis(based on the protologue of Averyanov & Nguyen,2012)
Stipules 1-1.7 cm long, ovate-triangular, strongly keeled with aristae 0.4-0.6 cm long, triangular
Petiole 10-14 cm long, white villous when young, turning brownish tomentose (2)3-6(10) cm long, densely villous
Leaf blade   
 Apex Acuminate Obtuse to nearly rounded
 Shape Ovate Broadly ovate or reniform
 Size 11.5-18.5 cm long, 8–12 cm wide (5)8-12(15) cm wide, usually broader than long
 Texture Chartaceous Leathery
 Peduncle 5-10.5 cm long, shorter than petiole, brownish tomentose 8-12(15) cm long, exceeding leaves, glabrous
 Carpellate flowers Outer tepals pinkish-white, suborbicular or broadly ovate, 0.8-1.1 cm long, 0.7-1.1 cm wide; inner 1 elliptic, white, 0.8-0.9 cm long, 0.3-0.4 cm wide Outer tepals light olive-green, broadly reniform, 0.5-0.6 cm long, 0.9-1.1 cm wide; inner 1 narrowly obovate, 0.5-0.6 cm long, 0.3-0.35 cm wide
 Staminate flowers Outer tepals pale pinkish-yellow, broadly ovate, 0.9-1.1 cm long, 0.6-1.1 cm wide; inner 2 elliptic, white, 0.7-1.1 cm long, 0.4 cm wide Outer tepals white to light pink (abaxially flushed with brightly red), broadly ovate to almost orbicular, 0.8-0.9 cm long; inner 2 narrowly obovate, 0.4-0.5 cm long, 0.25-0.3 cm wide
Capsule 1-1.5 cm long; abaxial wing crescent-shaped, 0.6-0.9 cm tall 0.8-1 cm long; abaxial wing oblique-triangular, 0.4 cm tall