Table 2.

Comparison of Begonia ferox with B. nahangensis

	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
Inflorescence
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