146 SUB-ALPINE PLANTS 



Rather moist, stony places on the primary rocks ; 3300-8000 

 feet. July, August. 



Distribution. — Eastern, Central, and Western Alps ; Pyrenees, 

 Spain. 



Saxifraga mutata L. 



Stem erect, springing from a rosette of large leaves. Stem ends 

 in a racemose cyme, covered with viscous hairs, like the bracts, 

 flower - stalks, and calyx ; ultimate branches i-many flowered. 

 Rosette-leaves thick, stiff, glabrous, tongue-shaped, or obovate- 

 lanceolate, flat, obtuse, with a cartilaginous white margin, densely 

 fringed below, inconspicuously serrate towards apex or entire, with 

 distant, inconspicuous dots which are encrusted with lime when 

 young. Stem-leaves smaller and passing into bracts. Petals linear- 

 lanceolate, acute, orange-yellow. Sepals oval, obtuse, much broader 

 than the petals. 



Damp, rocky places and among debris in limestone mountains, 

 descending into the valleys. June to August. 



Distribution. — Carpathians, Eastern, Central, and Western Alps. 

 Not found in the Jura or high Swiss Alps, but occasionally in the 

 plains. 



Saxifraga Aizoon Jacq. (Plate XIV.) 



Root putting out naked runners bearing half-closed rosettes of 

 leaves. Stem erect, 3-10 inches high, bearing a loose racemose 

 cyme, glandular-hairy like the bracts, flower-stalks, and calyx, or 

 calyx and lower part of stems glabrous. Branches 1-3 flowered. 

 Rosette-leaves thick, stiff, glabrous, with cartilaginous teeth, and 

 depressed dots near the margin ; teeth sharp, covered like the dots 

 with a white, at length deciduous, calcareous incrustation. Stem- 

 leaves much smaller and more wedge-shaped, passing into the 

 bracts. Petals obovate, obtuse, snow-white or sometimes cream- 

 coloured, and often dotted with red. Very variable in size, colour, 

 and habit, but nurserymen are too apt to give names to so-caUed 

 varieties which are not always constant in their characters. 



Common in rocky places in calcareous mountains up to 8500 feet. 

 June to August. 



Distribution. — Carpathians, Silesia, Bohemia, Eastern, Central, 

 and Western Alps ; Jura, Vosges, Black Forest, Corbidres, Pyrenees, 

 Caucasus, Siberia ; North America. 



Saxifraga Cotyledon L. 



Stem 10-16 inches high, forming a many-flowered, loose, some- 

 what pyramidal panicle, branched from the base, glandular-hairy ; 

 the middle branches 5-15 flowered. Leaves of radical rosettes 

 tongue-shaped, entire, pointed or mucronate, dotted near the 

 serrated margin with an incrustation of lime, serratures carti- 



