NEW OR RARE HARDY SHRUBS. 



419 



Fig. 99. The DoiM". Crimson Currant. 



shaded by evergreens. In such sites, it is t 

 perfectly hardy. It is quite likely that this 

 double variety, being a Scotch seedling, 

 virill prove perfectly hardy with us in any 

 situation. 



III. MR. DOUGLASS' SPIR.EA. 



Spirtea douglasii. 



A very pretty new species of Spireea, 

 from California, where it was first discovered 

 by Douglass, the botanical collector of the 

 London Horticultural Society. It consider- 

 ably resembles our native species, S. tomen- 

 tosa, but it blooms a much longer time — in- 

 deed, from July till the autumnal frosts com- 

 mence. The flowers are of " a fine rosy 

 lilac, and are most numeronsly produced in 



Fig. 100. Spiraa douglasii. 



dense, compact, terminal racemes. 

 We are not aware that this spe- 

 cies has yet produced flowers in 

 the United States, as it has only 

 very lately been introduced from 

 the English gardens. It will, no 

 doubt, prove perfectly hardy, and 

 is very easily multiplied by cut- 

 tings. 



IV. THE TWO- WINGED SILVER BELL TREE. 



Halesia diptera. 



The common Halesia, or Silver Bell tree, 

 (//. tetraptera,) is one of the prettiest orna- 

 ments of our shrubberies, well known in 

 the spring, by its pendant, pale, bell-like 

 blossoms, and in summer, by its four-wing- 

 ed seeds. 



The present species is a much rarer one. 

 Its native country is Georgia and Carolina, 

 but it is hardy here, and is well entitled to 

 a prominent place in the pleasure grounds. 

 It differs very strongly from the common 

 species, in both the larger size, and the 

 purer white, of its flowers, and also in the 



