3io 



Iberbaceous plants. 



similar habit, with erect yellow flowers. Both are beauti- 

 ful plants for rockeries. 



Cinquefoil, Potentilla. — Few of these are of any real 

 ornamental value. Some are ueat rock plants, and deserve 



cultivation on this ac- 

 count. Among the 

 best are: nitida, very 

 dwarf, with s m al 1 

 ternate leaves form- 

 ing dense mats, 

 and numerous white 

 or pale rose-colored 



FIG. 139.— SHINING CINQUEFOIL (POTENTILLA NITIDAI. floWei'S Oil sl]<ll't ped- 



uncles; nivalis, leaves five- to seven-fingered, flowers white, 

 in small terminal clusters; Nepalensis, somewhat taller 

 than the last, leaves three- or five-fingered ; flowers in sum- 

 mer, rose-colored ; Russeliana, an erect, speading plant 

 with ternate leaves and scarlet-crimson flowers two inches 

 across ; Hopwoodiana, of a similar habit with yellow 

 flowers edged with bright rose. All the cinquefoils are 

 useful in rockeries only. 



THE SAXIFRAGE FAMILY. 



Grass of Parnassus, Pamassia palustris. — A very hand- 

 some plant of wet peat bogs and highland meadows. Stems 

 simple, with one or two sessile leaves and large, solitary, 

 white flowers; root leaves cordate, on long stalks; height 

 six or eight inches. Grows in scattered masses among the 

 grass, never in dense masses. Very fine for moist places in 



