IV. A NEW SPECIES OF LONICERA FROM 

 PENNSYLVANIA. 



By Otto E. Jennings. 



(Plate XX.) 



Among some botanical specimens collected by Mr. W. E. Clyde 

 Todd in western Ontario during the summer of 1906, and which were 

 submitted to the writer for determination, was a branch of Lonicera 

 oblongifolia (Goldie) Hooker, which differed so radically from speci- 

 mens collected on several occasions in northwestern Pennsylvania by 

 the writer, and regarded at that time as Lonicera oblongifolia, that a 

 possible confusion of species was at once suggested. By the kind 

 courtesy of Prof. J. M. Macoun, the writer was permitted to make a 

 careful examination of the specimens of Lonicera oblongifolia in the 

 Herbarium of the Geological Survey of Canada. These collections, 

 together with the collections in the Herbaria of the Carnegie Museum, 

 it is believed, represent a fairly representative series of the plants in 

 question and it appears from them that there is ample justification for 

 the recognition of a new species closely allied to Lonicera oblongifolia 

 and belonging with it in the subsection Oblongifolias Rehder. 



In his " Synopsis of the Genus Lonicera" Rehder 1 characterizes 

 the subsection Oblongifoliae, founding it upon "Lonicera oblongifolia 

 Hooker" and including only that species and its forma li calyculata, 

 Zabel," which Rehder says " differs only in the distinctly toothed 

 calyx." The relations of the subsection to the other subsections of 

 the genus are well stated by Rehder : "A monotypic group restricted 

 to northeastern North America. 2 It has no strongly marked charac- 

 ters, but as it shows no close relation to any other species, it seems 

 best to consider it as representing a separate subsection. Its nearest 

 affinity is with the Alpigenae, but it differs chiefly in the obsolete 

 bractlets, wholly adnate to the ovaries and therefore indistinct, by the 

 very caducous bracts, the absence of glands, the kind of pubescence 



1 Rehder, Alfred. Synopsis of the Genus Lonicera. Missouri Botanical Garden, 

 14th Annual Report : 27-232. 1903. 

 2 Z. c, p. 101. 



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