3° 2 



THE BOOK OF GARDENING. 



Symphyandra Wanneri, although a biennial, is a useful rock 

 garden plant, having showy Campanula-like blue flowers. It grows 

 from 6in. to 12m. high, .and is a native of the Alps. It is 

 sometimes known as Campanula Wanneri. 



Tiarella cordifolia (Fig. 181) is a charming plant for the 

 rock garden or the front of the mixed border; it has creeping 

 stems, and forms dense masses of delicate foliage, green at 

 first, but afterwards assuming a brownish tint. The stems rise 

 from 6in. to i2in. high, and during May and June bear 

 numerous small, Spiraea-like flowers which, when fully expanded^; 

 are of a creamy-white colour, but in the bud state are delicately 

 tinged with pink. It may be propagated by division. 



Veronica Teucrium (Hungarian Speedwell) bears many- 

 flowered racemes of light blue flowers in July. The stems are 

 from 9in. to i2in. long, and form a dense, spreading mass. Its 

 variety dubia, known also as V. prostrata, is one of the 

 showiest of the dwarf herbaceous kinds, and when in flower 

 forms an effective rockery plant. It is of prostrate habit, 

 forming dense tufts, covered during May and June with bright 

 blue flowers. 



Wahlenbergia tenuifolia (Fig. 182) is a hardy rock plant, 

 growing from 3m. to 6in. high, and flowering during June and 

 July. The leaves are rather long and narrow ; the flowers are 

 violet-purple, white at the base, and are borne from six to ten 

 together in a terminal tuft. 



Fig. 182. — Wahlenbergia tenuifolia. 



