JOHNSON: A REVISION OF THE SECTION BORAPHILA 19 



Pursh's name, Saxifraga erosa, was for a long time applied to the 

 species until Britton (1) restored Haworth's name. Pursh (23) based 

 his distinctions wholly on inadequate vegetative characters. Dr. Gray (31) 

 referred Pursh's species to the section Micranthes Tausch, but later altered 

 his opinion and referred it to the section Hydatica Tausch, though on what 

 grounds is not quite clear. At the same time he was led also to modify his 

 conclusions regarding Saxifraga Wolleana Torrey and Gray, which was 

 referred by him to the section Hydatica. 



Distribution. — In the Appalachians from northern New Jersey to northeastern 

 Georgia. 



Specimens examined : 



North Carolina: cold streams and wet rocks, Biltmore, April 27, July 3, 1897, 

 Biltmore Herbarium No. 885 (MBG 84083, UMH) ; cold streams, Biltmore, May 29, 

 1896, Biltmore Herbarium No. 885 (UMH, MBG 84318) ; Statesville, M, E. Hyams. 

 (UMH) ; flora of Roan Mountains, alt. 6,000 ft., June 25, 1880, /. S. Chickering, Jr. 

 (MBG 84316, UMH) ; Grandfather Mountain, Watauga County, June 16, 1891, Small 

 and Heller, No. 246 (MBG 83939, UMH 1 and 2) ; mountains. S. B. Buckley (MBG 

 84321) ; wet places, flank of Roan Mountains, June 20, 1879, Red field. No. 11722 (MBG 

 84314) ; mountains of North Carolina, Mitchell County, W. W. Ashe (MBG 84121). 



Tennessee: along Wolf Creek near the mountains, July, 1896, A. Ruth (MBG 

 83985) ; banks of mountain stream, near Thunder Head Mountains, July, 1894, A. 

 Ruth (UMH) ; banks of a mountain stream, Wolf Creek, July, 1898, A. Ruth, No. 

 265 (MBG 83938). 



Pennsylvania: no locality, 1841, S. B. Mead (MBG 84217) ; Bethlehem, June 6, 

 1872, T. C. Porter (MBG 84216) ; Easton, Redfield herbarium, 1895, Traill Green 

 (MBG 84317). 



West Virginia: Pocahontas County, June 15, 1896, W. M. Pollock (MBG 

 84313). 



No state cited: 5". B. Buckley, no locality (MBG 84320). 



•Section Dermasea (Haw.), sect. nov. 



Dermasea Hav/., Saxifr, Enum. 45. 1821 ; as genus. 



Micranthes D. Don. Trans. Linn. Soc. 13. 1822. 



Boraphila Engler, Verb. Zool.-Bot. Ver., Wien. 19 :522. 1869. 



Ovary partly inferior ; receptacle adnate merely to the base of the ovary 

 or deeper; carpels bottle-shaped, free to the base, connected by the adnate 

 receptacle and the gland; follicles erect or spreading at maturity; beaks 

 short or elongated and slender, divergent; stigmas globose or sometimes 

 oblong. Gland a fleshy ring or collar around the carpels a short distance 

 above the base of the calyx. Filaments clavate or subulate. Sepals spread- 

 ing or reflexed. Hairs uniseriate (Plates I, VI). 



Haworth founded the genus Dermasea on Saxifraga {Dermasea Haw.) 

 nivalis L., and included two new species of questionable status. He regarded 



