28o 



THE BOOK OF GARDENING. 



PoTENTiLLAS (Cinquefoils) are free-flowering plants, of easy 

 culture in the mixed border. Readily increased by seeds or by 

 division. P. a?-g}rophyUa^ known also as insignis^ is an 

 excellent border-plant, attaining a height of 2ft. ; it has fine 

 silvery foliage, and yellow flowers lin. in diameter. The variety 

 at?'Osangia?iea has dark crimson flowers, produced from May 

 onwards during the summer. F. nepalensis (syn. P. fo?'mosa) is 

 a plant growing from i8in. to 2ft. high, and yielding an 

 abundance of flowers from June to August ; they are rosy- 

 pink in colour, with dark centres. This is an excellent 

 plant for the mixed border or for back positions in the 

 rock garden. Numerous florists' varieties are also grown {see 

 " Appendix ''). 



Pyrethrums are effective border plants, thriving in any good 

 srarden soil. Thev are now included under CJu-ysajithemum. 



Easily increased by either 

 seeds, cuttings, or division. 

 P. pa?'th€?iifoLiuni aureum is 

 well known under the name 

 of Golden Feather," and 

 is largely used in summer - 

 bedding arrangements, as 

 described in the Chapter 

 "On Bedding Plants. '' P. 

 Pa?'the?iium (Common Fever- 

 few) is a fine border plant, 

 growing 2ft. high, and pro- 

 ducing its white flowers with 

 yellow disks during Ji^ne. 

 The whole plant has a very 

 strono; smell. Its varietv 

 flo?'e-ple7io is a handsome 

 plant, and difl'ers only in 

 having double white flowers. 

 P. 7'oseu7n is a plant, growing 

 from ift. to 2ft. high, and 

 flowering during June and July ; the florets of the disk are yellow, 

 whilst those of the ray are rose-coloured. P. ?'Oseum floi-e-pieiio 

 (Fig. 161) grows upwards of 2ft. high, and produces an abundance 

 of showTy^ semi-double rose-coloured flowers, which are grreatlv 

 prized for cutting purposes. P. Tchihatchewii (Russian Daisy) 

 is a valuable plant for dry banks and slopes, or for growing 

 under trees, in which position it retains its green colour, even 

 during dry weather. The leaves are very much divided ; the 

 stems grow 9in. high, and bear small white flowers with yellow 

 disks. P. iiligi7iosiu?i (see Chrysa7ithe77iu77i uUgi7iosu77i). A large 

 number of florists' varieties of Pyrethrums are now in cultiva- 

 tion, and these form splendid subjects for the mixed border. 



Fig. .161. — PviLETHiirM roseum 

 FLOS.E-PLEX0. 



