THE ORNAMENTAL PLANTS — PERENNIALS 279 



PcBonia officinalis. — Height, 2 to 4 feet ; early part of July. The 



double-flowered varieties are the best, and can be obtained in several 



colors and shades, t 

 Papaver nudicaule.* — Height, 1 foot ; second week of May ; flowers, 



medium size, orange, white, or yellow, almost continuously until 



late autumn, t 

 Papaver orientale. — Height, 2 to 3 feet ; first week of June ; flowers, 



very large, scarlet, and variously marked, according to variety, there 



being many forms. 

 Pentstemon barbatus var. Torreyi.* — Height, 2 to 3 feet ; first week of 



July ; flowers, deep red, borne in long spikes, very ornamental. 

 Phlox amxna.* — Height, 6 inches ; second week of May ; flowers, 



medium size, bright pink, in compact clusters. 

 Phlox decussata* (the garden perennial hybrids). — Height, 1 to 3 feet; 



third week of July ; flowers, of many beautiful shades and colors, are 



found in the large number of named varieties of this phlox, which 



continues to bloom until late in the autumn, t 

 Phlox reptans.'^ — Height, 4 inches ; fourth week of May ; flowers, 



medium size, purple, and borne in small clusters. 

 Phlox subulata* (setacea) . — Height, 6 inches ; third week of May ; 



flowers, medium size, deep pink, and borne in small clusters. 

 Platycodon grandiflorum. — Height, IJ to 2 feet; second week of July; 



flowers, very large, deep blue, borne singly or in twos.f 

 Platycodon grandiflorum var. album. — A white-flowered variety of the 



above and makes a fine contrast to it when they are grown together. 



It blooms a few days earlier than the species. 

 Platycodon Mariesii. — Height, 1 foot ; second week of July ; flowers, 



large and deep blue. 

 Polemonium coeruleum.* — Height, 2 feet ; second week of June ; 



flowers, deep blue, borne in terminal spikes. 

 Polemonium reptans.* — Height, 6 inches ; third week of May ; flowers, 



medium in size, blue, and borne profusely in loose clusters. 

 Polemonium Richardsoni.* — Height, 6 inches ; third week of May ; 



flowers, medium in size, blue, borne profusely in pendulous 



panicles. 

 Potentilla hybrida var. versicolor. — Height, 1 foot ; fourth week of 



June ; flowers, large, deep orange and yellow, semi-double. 



