i82 PLANT CULTURE 



Among the many dwarf trailers C. carpatica is probably the 

 most popular. It throws up a great number of stems from a dense 

 mound of compact growth. When in flower, it is the most attract- 

 ive of hardy perennials. C. isophylla and C. i. alba, blue and white, 

 are especially good for baskets or rockwork. Of C. carpatica there 

 are several forms having blue, pale blue, lilac and white flowers. 

 C. c. turbinata, a purplish blue, is dwarfer than the type, being es- 

 pecially suited for borders or rockwork. The Harebell, or Bluebell 

 of literature, is the C. rotundifolia. It is rather attractive. C. r. 

 Hostii is an improvement, having larger flowers and a stouter 

 stem. 



Propagation. Campanulas are raised from seed and by divi- ' 

 sion or cuttings. Seeds should be started under glass. Cover very 

 shallow and place in a light place at about 60 degrees temperature. 

 Transplant seedlings in flats as soon as they can be handled. Harden 

 young plants gradually and transfer to the open ground in May. 



CATANANCHE. A plant with grayish green, long, narrow 

 leaves, and blue or blue and white flowers borne on long, slender 

 stalks. The species C. carulea is of the easiest cultivation, and a 

 desirable herbaceous plant, often used as Everlastings. 



Propagation. Sow seeds late in the Fall and keep indoors; 

 they will germinate very early. Prick off into boxes and remove 

 to a coldframe when large enough. 



CENTAUREA (Baclielor's Button). Of this genus C. cyanus 

 is the Cornflower and C. moschata the Sweet Sultan. Both are an- 

 nual in duration. Seeds will germinate in the open ground. C. 

 americana is another good annual species which is sometimes grown 

 for Summer cut flowers; the color is pale rose. C. babylonica is a 

 good species to plant in the back part of an herbaceous border; the 

 fohage is silvery white; flowers thistle-like, bright yellow. The plant 

 reaches a height of from 6 to 1 2 feet. C. montana, the Mountain 

 Bluet, is the perennial Cornflower, blooming during the greater part 

 of Summer. There are forms with lilac, rose, red, white and sulphur 

 colored flowers. 



Propagation. Increased by division during the latter part of 

 March, also by seeds. 



CERASTIUM. C. Biebersteinii is a dwarf plant with a dense 

 mass of growths; flowers pure white; in bloom during May. C. 

 grandifiorum is a green-leaved species well adapted for growing in 

 dense, carpet-like masses over rocks. The leaves are very woollv, 



