ox 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 7naxima have blue flov/ers. A white variety 

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

 more, and flower from June to August. C. pyrainidalis (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 wnth large 

 blue salver-shaped flow^ers. Its w^hite 

 variety {alba) is similar in habit, differing 

 only in the colour of its flow^ers. 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 

 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. niaa-o- 

 cephala is a useful plant for the back of 

 the herbaceous border. It grows from 3ft. 

 to 4ft. high, and bears large heads ot 

 yellow Thistle-like flowers during July and 

 August. C. viontana is an early summer- 

 flowering species, growing 2ft. high, and 

 producing large bright blue flowers ; the 

 varieties alba and rosea differ only in the 

 colour of their flowers. C. piilchra growls 

 I ft. high, and bears purple flowers during 



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

 beautifully cut silvery-grey foliage. C. rutlienica growls about 

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

 in July. 



Chelone barbata. — This is synonymous with Pentstemon 

 barbatus. 



Fig. 151. — Campanula 

 glomeeata. 



Chrysanthemums are useful border plants, the cut flowers 

 being also much appreciated for decorative purposes. They are 

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



