acuta, lente paulatimque (non eruptione) dehiscens, semina 
directe sub arbore cadens. Valvae tenues, coriaceae, pericar- 
pio crassipapyraceo atque endocarpio tenuissimo char- 
taceoque, siccitate valde convolutae, perdurantes. 
The only species in this subgenus is 
Hevea microphylla Ule in Engler Bot. Jahrb. 35 (1905) 669. 
EXPLANATION OF PLATE 51 
1 and 2. habit. 3, leaf showing departure from normal shape. 4, valves of 
capsule showing mode of dehiscence. 5, seed. 6, pistillate bud, showing 
terminal spiralling. 7, staminate bud. 8, staminate flower with calyx removed. 
9, pistillate flower with calyx removed, showing large torus. 
Drawn by ELMER W. SMITH 
253 
