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42b. Dioscorea japonica var. oldhamii Uline ex R. Knuth in Engler, Pflanzenr.  87(IV. 43): 263.  1924.  
细叶日本薯蓣 xi ye ri ben shu yu 
 
 
 
 
 
Plants glabrous throughout. Bulblets apparently not formed. Petiole 1.5--3 cm; leaf blade lanceolate to linear, 6--12 × 0.7--1.5(--3) cm, membranous, basal veins 7, base hastate to cordate or subtruncate, apex acute. Fl. Jun, fr. Sep. 
 
 
 
* Scrub forests, mountain valleys, along rivers, roadsides. Guangdong, Guangxi, Taiwan. 
 
 
 
 
 
                        
                          
                        
                           
                        
                          
                        
                        
                      
 
                      
	 
                      
                         
		
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