— 196 — 



&*, mm* m> «, &Mmm.~&*mmw* vm*&&*= 



Populus sect. Tacamahaca Spach, Hist. Veg. X, p. 392 (1841) ; in 

 Ann. Sci. Nat. XV, p. 32 (1841)— Ledebour, PI. Ross. Ill, pt. 2, 

 p. 629 (1851)— Wesm.-el in DC. Prodr. XVI, sect. 2, p. 329 (1868)— 

 Koch, Dendrol. II, p. 494 (1872)— Dippel, Handb. Laubholzk. II, p. 203 

 (1892)— Kcehne, Deutsch. Dendrol. p. 78 (1893)— Schneider, Illus. 

 Handb. Laubholzk. I, p. 12 (1904) ; in Sargent, PI. Wils. Ill, p. 31 

 (1916). 



Syn. Populus Subgn. Tacamahaca Spach apud Lauche, Deutsch. 

 Dendrol. p. 317 (1880). 



Populus Subgn. Eupopulus Dode sect. Tacamahacce Dode in Mem. 

 Soc. Hist. Nat. Autun XVIII, p. 14 & 34 (1905). 



Pojmlus II. Eupopulus Dode 2. Tacamahaca Spach apud Ascher- 

 son & Gr^ebnee, Syn. IV, p. 46 (1908). 



Gemma? haud vel eximie viscida? glabrae squamis 4-6. Petioli teretes. 

 Lamina foliorum saepe penninervis. Bractea? decidual. Flores brevi- 

 pedicellati vel sessiles. Stamina 2-30 (6-60). Anthera? saltern pertem 

 deciduas. Stigmata 2-4 sessilia vel subsessilia. 



Species circ. 10 in Asia, Europa et America boreali incola, quarum 

 tres in Korea indigena?. 



' Turiones teretes. Folia eximie rugosa. Gemmae et folia juvenilia 



suaveolentia eximie viscosa P. koreana 



Turiones angulati. Folia plana. Gemma? et folia juvenilia haud 



suaveolentia 2 



(Petioli et costa adpresse pilosi P. Maximoiviczii 



[Petioli et costa glaberrimi P. Simonii 



35. Populus koreana Rehder. 

 (Tabula nostra XLIX.) 



Populus koreana Rehder in Journ. Arnold Arboret. Ill, p. 226 



1 < 



