298 ARBOHETUM ET FRUTICETUM BRITANN ICt'M. 



Genus VII. 



KE'^RIA Dec. The Kerria. Li?i. Syst. Icosandria Polygynia. 



Identificalion. Dec. in Trans, of Lin. Soc, 12. p. 156. ; Prod., 2. p. 541. : Don's Mill., 2. f.L]7. 



Synnnymes. iJdbus L., C4rchorus Thunh., Spir^'a Camh. 



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 niucronate at the apex ; imbricate in gestivation. 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. Flowers yellow. 



3^ 1. K. japo'nica Dec. The Japan Kerria. 



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



Synonymes. iji^bus japAnicus Lin. Mnnt. 245. ; Cdrchonis japonicus Tkunb. Fl. Jap. 227.; Spiraea 



japdnica Camb. Ann. Sci. Nat. 1. p. .^89. ; Spiree du Japon, Fr. 

 Engravings. Swt. Brit. Fl. Gard., 2d ser. t. 337. ; and ourj?g. 489. 



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

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

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

 June, and often all the summer. Carpels ?. 



Variety. 



Sk K. j. 2 flore pleno (Bot. Reg., t. 587.; Bot. Mag., t, 1296.; and our 



fig. 490.) Flowers double, 

 culture in British gardens. 



Introduced in 1 700, and in very general 



489. Ktrna japonica. 



ion. Kdrrio j. fiftre pltao. 



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, vmtil 

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

 naeus, and preserved in the herbarium of that great botani.st, now in the pos- 

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

 Candolle removed it from the genus forchorus, and formed that of Kerrw. 

 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. 



