ROSACEA 91 



3. RUBUS, L. 



Flowers in terminal or axillary corymbose panicles, 

 rarely solitary, white or pink ; stipules persistent, adnate 

 to the leaf-stalk; creeping or climbing shrubs, mostly 

 prickly. 



R. saxatiliSy L., is the only alpine species ; flowers 

 small, white, few, fruit red, of only 2-3 drupels, leaves 

 of 3 leaflets, stem erect, 6-18 in.; mountain woods, 

 common. R, Idceus^ L., Raspberry, is also common in 

 woods; and R. ccEsms, Dewberry, occurs frequently in 

 hedges. Of R. fruticosus, L., Blackberry, Bramble, up- 

 wards of sixty sub-species are recorded by GremH as 

 growing in Switzerland alone ; the minute characters 

 which distinguish them would exceed the limits of this 

 work. 



Tribe POTENTILLE/E. — Calyx inferior, persistent, in 

 two whorls ; carpels numerous, each ripening into an 

 achene. Genera 4-9. 



4. Dryas, L. 



Leaves simple, with adnate stipules; flowers large, 

 solitary ; calyx-lobes 8-9 ; petals 8-9 ; seed-vessel termi- 

 nated by a feathery style. 



D. octopetala^ L. (PI. 31); flowers i-ij in. diameter, 

 white, calyx covered with black glandular hairs, leaves 

 oblong-ovate, crenate, covered with a white wool on the 

 under side, stem prostrate, fruit very feathery. This 

 alpine plant, very striking both in flower and in fruit, is 

 frequent in high pastures in the Alps, Jura, and Pyrenees. 



