~>7. 13EGONIACKE. 43 



57. Begoniaceee. 



Begonia LENN. 

 Key 'to tto Forntosan Species. 



( 1 ) Leaves quite glabrous. (2) 



Leaves more or less hairy. (4) 

 ( 2 ) Leaves broadly rounded B. koto&isis. 



Leaves oblong or lanceolate. (3) 

 ( 3 ) Fruits winged on one side B. taiicaniana. 



Fruits entirely wingless B. aptem. 



( 4 ) Leaves ferrugineo-hirsute B. ferruginea. 



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



hairs. (5) 

 ( 5 ) Leaves palmately lobate B. sinensis. 



Leaves slightly lobate or not lolute B. laciniata uar. formosana. 



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

 ;ig, 40- 50 em. high, branched, glabrous, branches divaricate. Leaves long 

 petiolate oblique oblong 14 cm. long 6 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, serras 12 mm. distant, 6-7-nerved, glabrous on both sides, shining 

 alx>ve, dull beneath, petioles 4 cm. long, stipules lanceolate 7 mm. long. 

 Fruits cai>>ular depresso-globose, 12 mm. long. 14 mm. broad, depressed at 

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



HAD. llaudaizaii, Slmitiku, Cioslii/aii. 



N.-ar B. T HOOK. f. Bot. Mag. t. 4988, from which the pre- 



t plant differs in liaviug very small wings of the fruits; it resembles 

 B. //</'./'//</' . /'/ Ik)t. Mag. t. 4974, in respect of small wings of capsules, but 

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

 leaves. Also near B. Rozburyi A. DC. and B. inflata C. B. CLAEKE, l>ut 

 difl'ers from the both in having not homed, but quite rounded, fruits. 



