57. BEGONIACE2E. 43 



57. Begoniaceae. 



Hegonia LINN. 



Key to the Formosan Species. 



( 1 ) Leaves quite glabrous. (2) 



Leaves more or less hairy. (4) 

 ( 2 ) Leaves broadly rounded E. katmiixi*. 



Leaves oblong or lanceolate. (3) 

 ( 3 ) Fruits winged on one side ft. taiwaniana. 



Fruits entirely wingless ft. aptn-n. 



( 4 ) Leaves ferrugineo-hirsute ft. ferruginca. 



Leaves not ferrugineo-liairy, but very slightly beset with minute 



hairs. (5) 

 ( 5 ) Leaves palmately lobate ft. sinensis. 



Leaves slightly lobate or not lobate D. ladniala uar. formosaim. 



Begonia aptera HAY ATA Materials for a Flora of Formosa p. 122. Stem 

 strong, 40- 50 cm. high, branched, glabrous, branches divaricate. Leaves long 

 petiolate oblique oblong 14 cm. long G cm. broad, obtuse at the apex, base 

 very oblique, acute or truncate on the upper side, cordate or auriculate on 

 the lower side, auricles 2 cm. long as broad, remotely minutely mucronately 

 serrate, semis 12 mm. distant, 6-7-nerved, glabrous on both sides, shining 

 aljove, dull beneath, petioles 4 cm. long, stipules lanceolate 7 mm. long. 

 Fruits capsular depresso-globose, 12 mm. long, 14 mm. broad, depressed at 

 the apex, 3-celled, wings obscure or 0. 



HAD. flandaizan, Shiiitiku r Goshizan. 



Near ft. Wayeneriana HOOK. f. Bot. Mag. t. 4988, from wliich the pre- 

 sent plant differs in having very small wings of the fruits ; it resembles 

 E. microptera Bot. Mag. t. 4974, in respect of small wings of capsules, but 

 differs from that in having entire sepals and obscurely and remotely serrate 

 leaves. Also near B. Roxburgi A. DC. and E. wflata C. B. CLARKE, but 

 differs from the both in having not horned, but quite rounded, fruits. 



