ON HARDY HERBACEOUS PERENNIALS. 



267 



Campanulas are handsome subjects, with bell-shaped flowers. 

 The tall-growing kinds will be found invaluable for large borders. 

 Propagation by seeds, cuttings, or division. Campanula persici- 

 folia and its variety maxima have blue flowers. A white variety 

 (alba) is also grown. These plants attain a height of 2ft. or 

 more, and flower from June to August. C. pyramidalis (Chimney 

 Bell-flower) (Fig. 150) is a noble plant, forming a bushy pyramid, 

 composed of numerous stems, 4ft. or 5ft. high. These, during 

 June and July, are crowded with large 

 blue salver-shaped flowers. Its white 

 variety (alba) is similar in habit, differing 

 only in the colour of its flowers. The 

 species and its variety are splendid plants, 

 either for the border or for pot-culture. 

 Numerous others are also grown. An 

 excellent plant is C. glomerata (Fig. 151). 

 It grows some 2ft. high, and varies con- 

 siderably as to -colour from bluish-violet 

 to white. As the specific name implies, 

 the flowers are produced in clusters. 



Centaureas are useful border plants, 



of easy culture in ordinary garden soil. 



They are increased by either seeds or 

 1 cuttings. C. dealbata grows i-|ft. high, 



and bears rose-coloured flowers from July 



to September. C. glastifolia produces pale 



yellow flowers from June to September, 



on stems 3ft. to 4ft. high. C. macro- 

 \ cephala is a useful plant for the back of 



the herbaceous border. It grows from 3ft. 



to 4ft. high, and bears large heads o.i 

 1 yellow Thistle-like flowers during July and 



August. C. montana is an early summer- 

 flowering species, growing 2ft. high, and 

 ; producing large bright blue flowers; the 



varieties alba and rosea differ only in the FlG - 'S 1 -— Campanula 

 ; colour of their flowers. C. pulchra grows slomerata. 



ift. high, and bears purple flowers during 

 ; August ; its variety major has bright rosy-purple flowers and 

 : beautifully cut silvery-grey foliage. C. ruthenica grows about 

 1 3 ft - high ; it has graceful foliage, and bears pale yellow flowers 

 ■> in July. 



Chelone barbata. — This is synonymous with Pentstemon 

 ■ barbatus. 



j Chrysanthemums are useful border plants, the cut flowers 



J being also much appreciated for decorative purposes. They are 



readily increased by either seeds, cuttings, suckers, or root 



