GENERAL CATALOGUE. 95 
Spirza Thunbergii. THUNBERG’S SpirzA. D. Of dwarf habit and rounded, graceful form; branches slender 
and somewhat drooping; foliage narrow and yellowish green; flowers small, white, appearing early in 
spring, being one of the first Spirzeas to flower. Esteemed on account of its neat, graceful habit. Forces 
wellin winter. 35c. 
S. trilobata. THREE-LOBED SPIRZA. D. A vigorous grower. Three-lobed leaves; white flowers. 35c. 
S. ulmifolia. ELM-LEAVED SPIR@%A. D. Leaves somewhat resembling those of the elm, and large, round 
clusters of white flowersin June. (See cut.) 35c. 
S. Van Houttei. D. Without doubt the finest variety in the collection. At the flowering season in early June the 
plant is covered witha mass of large, white flowers, presenting a beautiful appearance. Hardy. (See cut.) 35c. 
SPIRZA VAN HovutTtTer. (Reduced.) 
The Sprr.zAs flower in the following order, from the middle of May to the middle of August: (1.) Arguta, 
prunifolia fl. pl., Thunbergii. (2.) Niconderti, tenissima. (8.) chameedrifolia. (4.) Van Houttei, cratcegifolia, lanceolata, 
lanceolata fl. pl., lanceolata robusta. (5.) ulmifolia. (6.) opulifolia aurea, crenata. (7.) Fontenaysit, salicifolia, sorbi- 
folia. (8.) Billardi. (9.) ariefolia. (10.) callosa, callosa alba, callosa superba, species japonica. 
