SAXIFKAGA.] SAXIFRAGES. 131 



Wall-tops and dry places, E. of Scotland, from Caithness southwards, all 

 England and Ireland, ascending to 1,800 ft. in Yorkshire ; fl. April-June. 

 Stem 2-6 in., simple or branched above. Radical leaves ^-1 in., rosulate ; 

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

 opposite ; pedicels slender. Flowers in. diam., erect, white. Calyx-tube 

 oblong. Petals small. Capsule inferior ; beaks short, divergent. DiSTRiB. 

 Europe, N. Africa, E. Siberia, W. Asia. 



8. S. rivnlar'is, L. ; perennial, stems decumbent rooting 1 3-flowered, 

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

 Alpine damp rocks and streams, between 3,000 and 3,600ft.; Ben Lawers, 



Braemar, Ben Nevis ; fl. July-Aug. Tufted, slender, succulent, 1-4 in., 

 slightly glandular-hairy. Leaves i-1 in. diam., lobes entire ; petioles as 

 long as the stems. Flowers 1-2, | in. diam., erect, white ; bracts leafy, 

 opposite, usually undivided. Cal//x-tube ^ as long as the lobes, hemi- 

 spherical. Petals distant, small, obovate-oblong. Capsule with short diver- 

 gent beaks. DISTRIB. Arctic and sub- Arctic Scandinavia, Siberia, E. and 

 W. N. America. 



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

 petioled reniform palmately deeply crenate, or lobulate, cauline sessile with 

 axillary scarlet buds, calyx-lobes erect obtuse. 



Schistose rocks near the top of Ben Lawers, alt. 4,000 ft.; fl. July.- Sparingly 

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

 leace* ^-f in. diam., often tinged red ; cauline more deeply lobed. Plovers 

 -Ij-f in. diam. , campanulate, drooping, white, rarely produced in Britain. 

 Calf/x-tube very short. Petals large, obovate.- DISTRIB. Arctic and Alpine 

 regions of Europe, N. Asia, America, and the Himalaya. I doubt if this is 

 more than an alpine and arctic state of S. gramilata. 



10. S. granula'ta, L. ; glandular-pubescent, stem erect bulbiferows 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 Aberdeen southwards, ascending to 1,500 ft. 

 in Yorkshire ; rare in Ireland ; fl. April-May. Gregarious, glandular-hairy. 

 Bulbs as large as a pea, brown. Stem 6-18 in. Radical leaves J-l in. diam.; 

 petioles 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. Stic/mas large, reniform. Capsule with slender 

 beaks. DISTRIB. Europe, N. Africa, W. Asia to the Himalaya, 



SECTION 6. Dactyloi'des, Tausch. Perennial, tufted, with many 

 floweiiess leafy shoots (except S. ccespitosa). Leaves alternate, palrnately- 

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

 suberect. Flowers white. Hairs articulate, glandular. 



11. S. csespito'sa, L.; flowerless shoots short densely tufted, leaves 

 cuneate 3-5-lobed, lobes subparallel obtuse, calyx-tube oblong or sub- 

 cylindric, lobes short erect, upper J of carpels free. 



Very rare and local, Ben Nevis, and Ben Avon, at about 3-4,000 ft. elevation ; 



fl. July-Aug. Tufts compact, bright green. Flowering-shoots 2-4 in., 



sparingly leafy. Leaves with the broad compressed petioles ^-f in., lobed 



to or beyond the middle, upper cauline undivided. Fencers ^ in. diam., 



K2 



