— 30 — 



of them give no corky bark. Whether the cork develope or not depends 

 on the individual nature likewise the wings of Euonymus alatus dis- 

 apear in the variety striatus. The Korean Ulmus japonica seems to 

 have alwaj's smaller leaves than the typical Hokkaido form. 

 Ulmus Davidiana var. laevigata Nakai, comb. nov. 

 Syn. Ulmus japonica var. laevigata Schneider in Sargent, PI. Wils. Ill, 

 p. 260 (1916), excl. syn. 



Ramuli ab initio glabri. Folia superne lasvia. 



Nom. Jap. Teriha-nire. 



Norn. Kor. Nurun-nam. 



Hab. 

 Prov. Kannan : fluvium Jalu superior, vallis Samsumuri (V. Komarov) ; 



Mt. Saikarei (T. Mori, no. 342). 

 Prov. Kanhoku: Mt. Kapporei (T. Nakai, no. 1962). 



Distr. Sachalin, Ussuri, Amur, Manshuria. 



1. Ulmus coreana Nakai -Q 5 -t/L^b 5 s (C^t 



2. Ulmus crassifolia Nuttall £> £6 ?) ;£h fe |s K #1 jt?\<. 



3. Ulmus parvifolia Jacquin 7'2 5 'h^k'C^i ^.M* ll'ifijo 



4. Ulmus Sieboldii Daveau (incl. U. Shirasawana). &^ tiC$lB^. 



Ulmus sect, Microptelea Bentham & Hooker, Gen. PL III, p. 352 (1883)- 

 Henry in Elwes & Henry, Trees Great Brit, & Irel. VII, p. 1848 

 (1913)-Daveau in Bull. Soc. Dendr. France no. 31, p. 21 (1914) 



Syn. Microptelea Spach in Ann. Sci. Nat. 2 ser. XV, p. 368 (1841); 

 Hist. Veget. XI, p. 113 (1S42). 



Ulmus subgn. Microptelea Phanchon in Ann. Sci. Nat. 3 ser. X, p. 

 279 (1848), pro parte-Koch, Dendrol. II. pt. 1, p. 422 (lS72)-Plan- 

 chon in Alp. de Candolle, Prodr. XVII, p. 161 (1S73), excl. U. Hoohe- 

 riawa-Engler in Engler & Prantl, Nat. Pflanzenfam. Ill, Abt. 1, p. 

 62 (188S), excl. U. Hooker icraa-Dippel, Handb. Laubholzk. II, p. 



