142 
A GARDEN FLORA 
inches across. It is growing in an open position 
in the Top Garden, and is seemingly hardy. 
P. nigra. Black Poplar. Europe. 
„ var. Thevestina. 
P. serotina. Black Italian Poplar. France. (Garden 
origin). 
P. serotina, var. aurea. 
P. szechuanica. 
Height 8 feet. Planted in the Arboretum 1914. 
P. Wobstii (probably tristisxlaurifolia). Garden origin. 
POTENTILLA. Cinquefoil. Rosacese. 
P. chinensis. China. 
P. Friedrichseni (davuricaxfruticosa). Garden origin. 
P. fruticosa. Shrubby Cinquefoil. N. Hemisphere of 
New and Old Worlds. 
P. salesoviana. Siberia. 
P. nepalensis, var. Miss Willmott. 
„ Other varieties. 
PRATIA. Campanulaceae. 
*P. angulata. New Zealand. 
PRIMULA. Primulacese. 
P. Auricula. Bear’s Ears, Common Auricula. Europe. 
P. bulleyana. China. 
P. capitata. Himalaya. 
P. cockbumiana. China. 
P. denticulata. Himalaya. 
„ var. cashmeriana. Himalaya. 
P. farinosa. Bird’s-eye Primrose. Northern regions. 
P. Forrestii. China. 
P. frondosa. Thrace. 
P. japonica. Japanese Primrose. Japan. 
P. marginata. Alps of Dauphiny and Piedmont. 
P. pulverulenta. China. 
