SAXIFKAGA.] SAXIFRAGES. 141 



SECTION 5. Nephrophyl'lum, Gaud. Annual or perennial. Leaves 

 chiefly radical, broad, palmately lobed. Sepals suberect, more or less 

 connate and adnate to the ovary. Petals white. Hairs articulate. 



8. S. tridactyli'tes, L. ; annual, stem erect many-flowered glandular- 

 hairy, leaves cuneate 3-5-fid, uppermost entire, petiole broad, calyx-lobes 

 short erect obtuse. 



Wall-tops and dry places, E. Scotland, from Caithness to Cornwall and Kent ; 

 ascends to 1,800 ft. in Yorkshire; Ireland; Channel Islands; fl. April- 

 June. Stem 2-6 in. ; simple or branched above. Radical leaves f-1 in., 

 rosulate ; segments linear-oblong, outer cleft. Cyme subracemose ; bracts 

 subopposite, pedicels slender. Flowers f in. diam., erect, white. Calyx- 

 tube oblong. Petals small. Capsule inferior; beaks short divergent. 

 DISTRIB. Europe. N. Africa, N, and W. Asia. 



9. S. rivular'is, L. ; perennial, stems decumbent rooting 1-3-flowered, 

 leaves reniform palmately 5-lobed, petiole slender, calyx-lobes acute. 

 Alpine wet rocks and streams, alt. 3,000-3,600 ft., Ben Lawers, Braemar, Ben 



Nevis; fl. July- Aug. Tufted, slender, succulent, 1-4 in., slightly glandular- 

 hairy. Leaves ^ 1 in. diam., lobes entire ; petiole as long as the stems. 

 Flowers 1-2, J in. diam., erect, white ; bracts leafy, opposite, usually un- 

 divided. Calyx-tube | as long as the lobes, hemispherical. Petals distant, 

 small, obovate-oblong. Capsule with short divergent beaks. DISTRIB. 

 Scandinavia, Arctic Europe, Asia, and America. 



10. S. granula'ta, L. ; glandular-pubescent, stem erect bulbiferous at 

 the base branched and many-flowered above, leaves petioled reniform pal- 

 mately lobulate, cauline sessile, calyx-lobes erect obtuse. 



Sandy banks and meadows, from Elgin to Somerset and Kent ; ascends to 

 1,500 ft. in Yorkshire ; rare in Ireland ; fl. April-May. Gregarious. Bulbs 

 as large as a pea, brown. Stem 6-18 in. Radical leaves f 1J in. diam., 

 petiole slender ; cauline deeper and more acutely cut. Flowers 1 in. diam., 

 campanulate, inclined or drooping, white. Petals large, obovate. Calyx- 

 lobes as long as the tube. Stigmas large, reniform. Capsule with slender 

 beaks. DISTRIB. Europe, N. Africa, "W. Asia, Himalaya. 



11. S. cer'nua, L. ; perennial, stem erect simple 1-3 -fld., leaves 

 petioled reniform palmately deeply crenate or lobulate, cauline sessile with 

 axillary scarlet buds, calyx-lobes erect obtuse. 



Schistose rocks, Ben Lawers, alt. 4,000 ft. ; fl. July. Sparingly glandular- 

 hairy, 2-6 in., leafy. Rootstock with scaly buds at its top. Radical leaves 

 |-| in. diam., often tinged red ; cauline more deeply lobed. Flowers -$ 

 in. diam., campanulate, drooping, white, rarely produced in Britain. 

 Calyx-tube very short. Petals large, obovate. DISTRIB. Arctic and Alpine 

 Europe, N. Asia, America, Himalaya. Probably a form of S. granula'ta. 



SECTION 6. Bactyloi'des, TauscTi. Perennial, tufted, with many 

 flowerless leafy shoots (except S. ccespito'sa). Leaves alternate, palmately - 

 partite or -lobed. Sepals connate at the base and adnate to the ovary, 

 suberect. Flowers white. Hair articulate, glandular. 



