xxvi. 



303 



on high rocks. Height 1 ft. to 2* ft. Introduced in 1825. Flowers white; 

 June and July. Capsule reddish ; ripe in September. 



A very distinct little species approaching S. vacciniifolia, D. Don. H. S. 

 & 9. S. TRILOBA'TA L. The 3-lobed-leaved Spiraea. 



Identification. Lin. Mant, 244. ; Camb. Monog. ; Dec. Prod., 2. p. 543. 

 Synonyme. S. trfloba Don's Mill. 2. p. 518. 



Engravings. Pall. Ross., 1. 1. 17. ; Wats. Dend. Brit., t. 68., as S. tri- 

 loba ; and our fig. 502. 



Spec. Char., $c. Leaves roundish, lobed, crenated, 

 glabrous, reticulately veined. Flowers in umbel-like 

 corymbs. Sepals ascending. Carpels glabrous. (Dec. 

 Prod.) A low erect shrub. Alps of Altai. Height 

 1ft. to 2ft. Introduced in 1801. Flowers white ; 

 May. Capsule reddish ; ripe in September. 



This species is very handsome, with branches spread- 

 ing horizontally, and bearing, in the flowering season, 

 numerous compact corymbs of pure white flowers ; 

 which, combined with the neat appearance of the plant, 

 and its glaucous leaves, rounded in their 1 outline, and yet lobed, render the 

 species a very interesting and ornamental one. 



& 10. S. ALPI'NA Pall. The Siberian alpine Spiraea. 



Identification. Pall. Fl. Ross., 1. p. 82. t. 20., according to 

 Camb. Monog.; Dec. Prod., 2. p. 543.; Don's Mill., 2. p. 518. 

 Engravings. Pall. Fl. Ross., 1. t. 20. ; and our Jig. 503. 



Spec. Char., %c. Leaves lanceolate-oblong, ses- 

 sile, serrulated, glabrous ; the midrib pinnately 

 branched. Flowers in terminal, stalked, and, 

 in many instances, leafless, corymbs. Sepals 

 ascending. (Dec. Prod.) An erect shrub. 

 Siberia, in wooded alps. Height 4 ft. to 6 ft. 

 Introduced in 1806. Flowers white ; June and 

 July. Capsule reddish ; ripe in September. 



The corymbs of flowers being large in propor- 

 tion to the leaves renders this species very orna- 

 mental when in bloom ; and its beauty is 'farther 

 heightened by the plant being of erect growth. 



A 11. S. flYPERiciFO^LiA Dec. 



The Hypericum-leaved Spiraea. 



2. p. 519. 



Identification. Dec. Fl. Fr., 5. p. 645. ; Prod., 2. p. 543. ; Don's Mill 

 Synonymes. Hypericum fritex Hort. ; Italian May. 

 Engravings. See Varieties. 



Spec. Char., fyc. Leaves obovate-oblong, 3- 4-nerved, entire or toothed, 

 glabrous, slightly downy ; primary veins pinnately branched. Flowers in 

 either peduncled corymbs, or sessile umbels. Pedicels glabrous, or slightly 

 downy. Sepals ascending. A species that presents diversified appearances. 

 (Dec. Prod.) An erect shrub. Supposed by some to be a native of Ca- 

 nada ; but Smith and Hooker think that, like most of 

 the species of the section to which it belongs, it is only 

 to be found wild in the Old World. Height 4 ft. to 6 ft. 

 Introduced in 1640. Flowers white ; June and July. 

 Capsule reddish ; ripe in September. 



Varieties. Seringe has characterised six forms of this species, 

 which he describes as follows : 



& S. h. 1 uralensis Ser. S. crenata Lin., Fisck. in 

 Litt.. and Don's Mill. ii. p. 519.; S. Mpericifolia 

 Camb. Monog. (Our fig. 504.) Branches rigid, i04 . ^ h uratfnsis . 



