GENERAL CATALOGUE. 



95 



-Spirsea Tliiinbergii. Thunberg'S Spiraea. D. Of dwarf habit and rounded, graceful form ; branches slender 

 and somewhat drooping-; loliag-e narrow and yellowish green; flowers small, white, appearing early in 

 spring, being one of the first Spli'seas to flower. Esteemed on account of its neat, graceful habit. Forces 

 well in winter. 33c. 



S. trilobata. Three-lobed Spir^a. D. A vigorous grower. Three-lobed leaves ; white flowers. 35c. 



S. xilmifolia. Elm-leaved Spiraea. D. Leaves somewhat resembling those of the elm, and large, round 

 clusters of white flowers in June. (See cut.) 3.5c. 



-S. "Van Houttei. D. Without doubt the finest variety In the collection. At the flowering season in early June the 

 plant is covered with a mass of large, white flowers, presenting a beautiful appearance. Hardy. (See cut.) 3dc. 



Spir^a Van Hottttei. (Reduced.) 



The SpiB.a!AS flower in the following order, from the middle of May to the middle of August : (1.) Aryuta-, 

 :xyrunifolia fl. pi., Thunhergii. (3.) Niconderti, tenissima. (3.) chamoBdrifolia. (4.) Van Houttei, cratcegifolia, lanceolata, 

 laneeolala fl. x>l., lanceolata robusta. (5.) ulmifolia. (6.) opulifoUa aurea, crenata. (7.) Fontenaysii, salicifolia, swbi- 

 folixi. (8.) Billardi. {9.) aricefolia. (10.) callosa, callosa alba, callosa superba, species ja^onica. 



