•05 



very k'w of llic huiulrcds of cxisliiif,' shalc-slopcs have ever been 

 investigated by botanists, additional species no doubt remain to 

 be recognized, and details of the distribution of already known 

 species remain to be worked out. One addition to the list of 

 recognized species, and several extensions of range are here 

 placed on record. 



The Longleaf Clover, TrijoHiini ■z'irc/iniciim Small.' was dis- 

 covered on Kates Mountain in 1892, and for 30 years no other 

 occurrence of it was known. In 1923 Hunnewell- found it at Hot 

 Springs, X'irginia, but these twcj are the only localities definitely 

 mentioned in the literature. In the course of field work with his 

 classes during the past five years, Professor P. D. Strausbaugh,"' 

 of West \'irginia University, has discovered this plant at two new 

 localities in that state, near Burlington, Mineral County, and Sweet 

 Springs, Monroe County. Its range has now been further ex- 

 tended by the finding of it in May, 1928, by participants in a Wild 

 Flower Preservation Society field trip, at Gilpin and Pratt, Alle- 

 gany County, Maryland. Instead of being exceedingly rare, as 

 would be inferred from its representation in herbaria and published 

 records, this ])lant evidently occurs more or less throughout the 

 shale-slope region, although limited to the most barren situations. 

 As no habitat photograph of the Longleaf Clover appears ever to 

 have been published, one is reproduced herewith.^'* 



One of the most characteristic plants of the Appalachian shale- 

 slopes is an erect Convohndus which is not accorded a place in 

 current botanical manuals. While related to C spitJiamacus L., it 

 differs from that species in several respects. Typical C. spitlia- 

 maeus has a lax habit, with the internodes much exceeding the 

 petioles; the pubescence rather sparse (or exceptionally fairly 

 dense) ; the leaf-blades elliptic or somewhat obovate, little if at all 

 auricled, and conduplicate only when young ; the petioles about 34 

 as long as the blades ; and the bracts elliptic, more than twice as 

 long as broad, narrowed toward the base, and but slightly keeled. 



' Mem. Torr. Bot. Club, 4: 112. 1893. 



-Rhodora, 25: 168. 1023. 



' Private communication. 



■'"' While this paper was in course of publication, the clover has been 

 found in two new Virginia localities, just west of Gore, Frederick Co., 

 and 1J/2 miles west of Covington, Alleghany Co. This makes 8 stations now 

 definitely known. 



