1924) REHDER. FORSYTHIA VIRIDISSIMA VAR. KOREANA 155 



K e i s h o, Chirisan, common by roadsides and stream-sides, alt. 600- 

 1845 m., E. H. Wilson, no. 9607, November 14, 1917. 



Cultivated. Korea: Keiyjo, Chosen Hotel, E. H. Wilson, no. 

 11241 Jan. 6, 1919 (flowers forced in the house). Arnold Arbore- 

 tum: December 24, 1919 (seedlings), October 14, 1920 and (forced 

 flowers) February 12, 1924 (plants raised from seed received from the 

 Forest Department of Korea in 1919); April and September 1917 (planti 

 received from Yokohama Nursery Company in 1915 as Forsythia spec. 



from Korea). 



From typical F. viridissima Lindley of which there are specimens from 

 Kiangsi*, Chekiang and Fokien in this herbarium besides those from cul- 

 tivated plants, the variety differs chiefly in the more spreadnig habit, 

 larger and brighter colored flowers, longer and narrower sepals and in the 

 more closely and finely serrate generally ovate-oblong or ovate lanceolate 



cuneate 



the base. In typical 



the 



middle and narrow-cuneate at base, the serration is coarser, usually con- 

 fined to the part above the middle and the leaves are more often entire, 

 while on leaves of the more vigorous shoots of the variety the serration, 

 which is coarser but with ascending mostly rounded teeth not flaring as 

 in the type, extends to near the base ; on very vigorous shoots occasionally, 

 though apparently very rarely, trifid leaves are produced which I have 

 never seen in typical F. viridissima. 



From the hybrid F. intermedia Zabel (F. suspensa X viridissima) 

 to which the variety bears some resemblance in habit and in the shape of 

 its leaves, it is easily distinguished by the continuous lamellate pith, 

 interrupted in the hybrid by solid diaphragms at the nodes and partly 

 wanting in the internodes particularly of vigorous branches ; in F. suspensa 

 the internodes are quite hollow and the pith reduced to diaphragms at 

 the nodes. The hybrid seems to occur also in Korean gardens, for there 

 is a specimen before me collected by J. G. Jack in Seoul, September 22, 

 1905, from a cultivated plant, and a specimen collected by Dr. R. G. Mills, 

 also at Seoul, on April 16, 1914, which both are referable to the hybrid, 

 also specimens collected by E. H. Wilson (no. 6368) in the Tokyo Botanic 

 Garden, on April 5 and July 12, 1914, from plants named Forsythia 

 viridissima from Korea, belong here and so did part of the cuttings from 

 these plants sent in 1915 by the Yokohama Nursery Company as Forsythia 

 c™** frnm TCnrp* while at least, one of these nlants was the true F. viridis- 



sima var. koreana. 

 to the typical form 

 colored flowers anc 



referred 



