— 4 — 



Sect. IV. Trifoliata, (Pax) Koidz. 



Folia ternata. Inflorescentia racemosim 3-5 floris, andro- 

 dioica v. monoeica. 



Subgn. III. Circumstaminalia, Nakai. Subgn. nov. 



Stamina a fossis disci evoluta ie. quidque stamen basi 

 disco continuo circumdatur. 

 Sect. V. Platanoidea, Pax. 



Folia 3-7 (vulgo 5-7) lobata. Inflorescentia corymboso- 

 paniculata, polygama. 



Subgn. III. Intrastaminalia, Pax. 



Stamina discum circumdant v. in sinu lobi posita. 

 Sect. VI. Macrantha, Pax. 



Flores omnes ad apicem rami hornotini terminales. 

 Perigonium pentamerum. Stamina 8. Androdioica. 

 Antherse apice obtusae. 

 Sect. VII. Palmatoidea, Koidz. 



Flores omnes ad apicem rami hornotini terminales. 

 Perigonium pentameri. Stamina 8. Dioica. Antherse 

 apiculatse. 

 Sect. VIII. Arguta, Rend. 



Dioica. Perigoniumm fl. £ tetramerum. Stamina 4-6. 

 Perigonium fl. ■£■ pentamerum. Flores £ in gemmis 

 lateralibus aphyllis positi. 



^r— fp^ % f,\ £, (i* 1i Acer ukurunduense, Trautv. 



et Mey. 

 3 "3" if & * J £> fi' ^ Acer ukurunduense, var. pilo- 



sum, Nakai. 



^HfPx A" C C &" fr -^ tr Acer Ginnala, Maxim. 



fofr&<?)ipt, C^iP^t' Acer Ginnala, f. coccineum, 



Nakai. 



^Hfju tJ.*A^i Ut Acer palmatum, Thunb. v. 



coreanum, Nakai. 



