TROCHODENDRACEAE. — EUPTELEA 315 
anthers, the size and shape of the fruit and the number of seeds in each are all 
inconstant and. cannot be relied upon. Finet & Gagnepain (l. c.) give a key to 
the species based on the shape of the fruit. Specimens before us show all forms 
on the same branch. 'The appearance of the under surface of the leaves, how- 
ever, affords a constant character by which the species, and especially the two 
Chinese species, may easily be recognized. Solereder (l. c.) was the first to draw 
attention to this and an exhaustive examination of our material amply sup- 
ports his conclusions as to the identity of Baillon’s E. Davidiana with Hooker & 
Thomson’s E. pleiosperma. 
'The three species of the genus may be recognized by the following charao- 
ters: — 
E. polyandra Siebold & Zuccarini: bark brown; dentation of leaves irregular 
and more exaggerated in this respect than in other species; under surface of leaves 
pale green and exhibiting a tendency towards papillosity; fruit normally 1-seeded 
although 2 seeds are occasionally to be found. Distribution: Japan. 
E. Franchetii Van Tieghem; bark dark; dentation of leaves fairly regular; 
under surface of leaves green; non-papillose, the epidermis being perfectly smooth; 
fruit 1-4 (usually 2-3)-seeded. Distribution: central China. 
E. pleiosperma Hooker & Thomson: bark dark; dentation of leaves fairly 
regular; under surface of leaves glaucescent, papillose; fruits rather larger than in 
other species, 1-4 (usually 2-3)-seeded. Distribution: Mishmi Hills, north-east of 
Assam, western and south-western China. 
The flowers in all three species are hermaphrodité, proterandrous and ane- 
mophilous, not polygamous as usually stated. The stamens are early deciduous, 
falling away before the stigmas of the female flowers borne on the same fascicle or 
on the same shoot are mature. The statement that the trees are diccious is 
erroneous and has led to much confusion. 4 
