KEY TO THE SPIRE AS 155 



erect ; stamens longer than the round petals. CRENATE SPIKEA 

 (211) Spirrea crenata. 



C. Leaves f-lf inches long and almost as broad as long, smooth 

 dark green above and bluish green below, thick and almost ever- 

 green; tall, to 8 feet with spreading branches. ROUND-LEAVED 

 SPIREA (212) Spiraea bracteata. 



B. Margin of leaves decidedly notched and surface smooth on both 

 sides ; stamens not longer than the petals. (D.) 



D. Leaves f-lf inches long, broad ovate and feather-veined ; hardy 

 only South ; petals about as long as stamens. BLUME'S SPIREA 



- Spinea Blumei. 

 D. Leaves -! inches long, 3-6-ribbed from base and often 3-lobed 



at tip; shrub to 4 feet with spreading branches; common. 



THREE-LOBED SPIREA (213) Spiraea trilobata. 

 D. Leaves f-1 f inches long ;' petals twice the length of the stamens ; 



to 6 feet with arching branches ; common. VAN HOUTTE'S 



SPIREA (214) Spirtea Van Houttei. 



D. Leaves decidedly more elongated, 1-2| inches long, dark green 

 above and bluish green below ; handsome and common South 

 but not fully hardy North, growing to the height of 4 feet with 

 arching branches ; flowers larger in dense clusters, often double 

 (var. flore pleno). LANCE-LEAVED SPIREA (215) Spiraea 

 cantoniensis (S. lanceolata, S. Reevesiana). 



B. Margin of leaves decidedly notched and surface pubescent, espe- 

 cially below ; stamens not longer than the petals. (E.) 



E. Flowers and seed-pods also pubescent ; hardy only South. (F.) 

 F. Lower side of leaves covered with grayish hairs. Spiraeablanda. 

 F. Lower side of leaves covered with yellowish hairs. CHINESE 



SPIREA Spiraea chine'nsis. 



E. Flowers and seed-pods smooth ; shrub to 6 feet with slender 

 arching branches ; hardy and frequent North. DOWNY-LEAVED 

 SPIREA (210) Spirsea pube'scens. 

 B. Margin of leaves serrate or doubly serrate ; stamens longer than 



the petals ; calyx reflexed. (G.) 



G. Upright shrub to five feet with round and usually smooth 

 branches ; leaves slightly notched near tip, l-2 inches long. 

 INTERMEDIATE SPIREA (217) Spiraea media. 

 G. Shrub to 6 feet with smooth but angular branches ; leaves de- 

 cidedly notched, 2-3 inches long. GERMANDER-LEAVED SPIREA 

 (218) Spiraea charnsedryfolia. 



* White or pink flowers in broad and flat compound clusters at the 

 tips of the branches, blooming in June and later, some as late as 

 August. (H.) 



' 



