298 ARBORETUM ET FRUTICETUM BR1TANNICUM. 



GENUS VII. 



u 

 KE'RRIA Dec. THE KERRIA, Lin. Syst. Icosandria Polygynia. 



Identification. Dec. in Trans, of Lin. Soc., 12. p. 156. ; Prod., 2. p. 541. ; Don's Mill., 2. p. 517. 



Synnnymes. .fftibus L. t Cfirchorus Thunb., Spiraea Camb. 



Derivation. Named in honour of W. Ker, a collector of plants for the Kew Gardens. 



Gen. Char. Calyx 5-cleft; lobes ovate, 3 of which are obtuse, and the other 

 two callously mucronate at the apex ; imbricate in aestivation. Petals 5, 

 orbicular. Stamens about 20, arising from the calyx with the petals, ex- 

 serted. Carpels 5 8, globose, free, glabrous, each ending in a filiform style. 

 Seed solitary. (Don's Mill.) 



Leaves simple, ovate, lanceolate, alternate, stipulate, deciduous ; coarsely 

 and unequally serrated, feather-nerved, conduplicate. Floivers yellow. 



& 1. K. JAPO'NICA Dec. The Japan Kerria. 



Identification. Dec. in Trans, of Lin. Soc., 12. p. 156. ; Prod., 2. p. 541 . 



Synonymes. .RM>us japdnicus Lin. Mant. 245. ; Cflrchorus jap6nicus Thunb. Fl. Jap. 227. ; Spiraea 



jap6nica Camb. Ann. Sci. Nat. 1. p. 389. ; Spiree du Japon, Fr. 

 Engravings. Swt. Brit. Fl. Card., 2d ser. t. 337. ; and our fig. 489. 



Spec. Char., fyc. Leaves ovate, lanceolate, coarsely and unequally serrated, 

 feather-nerved ; stipules linear, subulate A deciduous shrub. Japan. 

 Height 3 ft. to 5 ft. Introduced in 1835. Flowers yellow ; March to 

 June, and often all the summer. Carpels ?. 



Variety. 



& K. j. 2 fibre plena (Bot. Reg., t. 587. ; Bot. Mag., t. 1296.; and our 

 fig. 490.) Flowers double. Introduced in 1700, and in very general 

 culture in British gardens. 



489. Kerriajaponica. 490. Ktoria j. fl&re plino. 



It has soft, and not very persistent, wood, clothed with a smooth greenish 

 bark ; twig-like branches ; leaves that are ovate-lanceolate, and serrated with 

 large and unequal teeth, feather-veined, and" concave on the upper surface ; 

 stipules that are linear-subulate. The single-flowered variety was, until 

 1835, only known through a solitary specimen received from Thunberg by Lin- 

 naeus, and preserved in the herbarium of that great botanist, now in the pos- 

 session of the Linnaean Society. It was after examining this specimen that De 

 Candolle removed it from the genus C'orchorus, and formed that of Kerria. 

 The double variety is generally planted against a wall, more especially north 

 of London. It is easily and rapidly propagated by its suckers, and grows freely 

 in any common soil. 



