JOHNSON: A REVISION OF THE SECTION BORAPHILA 23 



considerably coarser and thicker than in the other specimens cited above, 

 and more suggestive of S. caroliniana. Two other specimens from the same 

 herbarium, namely MBG 84204, "legit S. B. Buckley 1842," from North 

 Carolina, and MBG 84287, "legit S. B. Buckley, . . . in montibus Carolinae 

 et Georgiae" are referred by the collector to this species, but they are in too 

 poor condition for use. The species was recognized by Rosendahl (25, 

 p. 66) and by Engler (5, p. 136) who, however, also referred Saxifraga 

 caroliniana Torrey and Gray to this species, as a variety. 



Saxifraga Careyana appears to be a much smaller and more delicate 

 plant than either 5". caroliniana or S. tennesscensis. The scape is very slen- 

 der and also low, and the branches of the inflorescence filiform. Harsch- 

 BERGER (15, p. 496), depicting the vegetation of the southern Appalachians, 

 found the plant growing under overhanging cliffs, and describes it thus : "the 

 delicate little Saxifraga Careyana." 



It is difficult to determine from the material whether the calyx-seg- 

 ments are consistently spreading or reflexed. In the flowers they appear 

 spreading, although in some cases apparently reflexed. The same difficulty 

 appears when in fruit, but here in most cases they are reflexed (Plate VII). 



Distribution. — "Mountains of North Carolina" according to Small (27). The 

 specimens examined that can with some degree of certainty be referred to this species, 

 are all from Roan Mountain, North Carolina, as given below. 



Specimens examined : 



North Carolina: July 5, 1880, /. W. Chickering, Jr. (MBG 84284) ; alt. 6,000 ft., 

 July 5, 1880, /. W. Chickering, Jr. (UMH) ; in shade of the overhanging rocks, June 

 21, 1879, /. H. Redfield, No. 11721 (MBG 84285). 



Saxifraga caroliniana A. Gray, Mem. Amer. Acad. 3 :39. 1846. 

 Saxifraga Careyana var. caroliniana Torrey and Gray, Mem. Amer. 

 Acad. 3:39; Engler, Monogr. Saxifr. 137. 1872. 



Saxifraga Gray ana Britton, Mem. Torr. Bot. Club 5:178. 1894. 

 Micranthes Gray ana (Britton) Small, Fl. S.E.U.S. 501. 1903. 

 Micranthes caroliniana (A. Gray) Small, N. Am. Fl. 22:2:146. 1905. 



A tall and graceful species with carpels and other floral characteristics 

 very similar to those of S. Careyana, except that it has clavate filaments. 

 The beaks of the carpels are characteristically long and slender. In foliar 

 characters it is strikingly similar to the western Saxifraga idahoensis Piper. 

 The following quotation from Small and Vail (29), in regard to this 

 species, may be of interest: "This interesting plant was first collected by 

 Dr. Asa Gray on Grandfather Mountain, North Carolina, growing with 

 5". Ca/reyana, both plants being published under that name in Am. Journ. 

 Sci. XIII, in 1842. Dr. Gray wrote that the difference between the two 

 plants was not detected till they bloomed in Cambridge the following spring, 



