466 



ARBORETUM ET FRUTICETUM BRITANNICUM. 



& 1. I). SCA V BRA. The scabrous Deutzia. 



Identification. Lin. Syst., p. 425. ; Thunb. Jap., t. 185. ; Don's Mill., 2. 



Engravings. Thunb. Jap., t. 24. ; Bot. Reg., 1. 1718. ; and our fig. 836. 



Spec. Char., fyc. Leaves ovate, acuminated, serrated, 

 scabrous from stellate down. Flowers in compound 

 panicles ; peduncles and pedicels scabrous. Calycine 

 lobes short and bluntish. (Don's Mill.) A sar- 

 mentose, showy, free-flowering shrub. Japan. 

 Height 4ft. to 6 ft. Introduced in 1822. Flowers 

 white ; May and June. Fruit brown ; ripe in Sep- 

 tember. Decaying leaves yellowish brown. Naked 

 young wood purplish brown, 



jt 2. D. (s.) CORYMBO\SA. The corymbose-flowered 

 Deutzia. 



Identification. R. Br. in Wall. Cat., 3652. ; Don's Mill., 2. p. 808. 

 Synonymes. D. cane"scens Sieboldt; jPhiladelphus corymbbsus Wall. 

 Engravings. Royle Illust., t. 46. fig. 2. ; and our fig. 837. 



Spec. Char., $c. Glabrous. Leaves ovate, acuminated, 

 cuspidately serrated. Panicles corymbose, trichoto- 



mous. Panicle and outside of calyx dotted. Teeth of 

 calyx short and rounded. Teeth of filaments, shorter 

 than the anthers. (Don's Mill.) A sarmentose shrub. 

 Nepal, on mountains. Height 3 ft. to 4 ft. Introd. in 

 1830. Flowers white, sweet-scented, produced in 

 abundance ; May and June. Fruit ?. Decaying leaves 

 yellowish brown. Naked wood brown. 



D. staminea R. Br., Philadelphia stamlneus Wall., 

 has entire, scabrous, lanceolate leaves, and white sweet- 

 scented flowers. A native of Nepal, on high mountains ; 

 but not yet introduced. 



837. D. ($.) corymbbsa. & Srunon\3. Watt., Leptospermum scabrum Wall., 



has ovate leaves, and axillary white flowers. It is a 

 native of Kamaon, but has not yet been introduced. All these are pro- 

 bably only varieties of one form. 



836. Defrtzta scabra. 



GENUS III. 



r " 



DECUMA'RIA L. THE DECUMARIA. Lin. Sy.it. Dodecandria 

 Monogynia. 



Identification. Lin. Gen., No. 597. ; Lam. 111., t. 403. ; Don's Mill., 2. p. 808. 



Synowyme. Forsyihta Walt, not of Vahl. 



Derivation. From decuma, a tenth ; in reference to the prevailing number, in some of the parts 

 of fructification, being ten. In DeCandolle's description of the genus, it is stated that the teeth 

 and nerves of the calyx, the petals, the stigmas, and the cells of the capsule, are each usually ten. 



Gen. Char. Calyx tube campanulate; limb 7 10-toothed. Petals oblong, 

 equal in number to the teeth of the calyx, and alternating with them. Sta- 

 mens thrice the number of the petals, disposed in one series. Style 1. 

 Capsule ovoid, connate with the calyx. Seeds numerous, oblong. (Don's Mill.) 

 Leaves simple, opposite, exstipulate, deciduous ; glabrous, entire or toothed 

 at the apex. Flowers white, sweet-scented, disposed in terminal corymbs, 

 sometimes dioecious. Leaf buds beset with short rufous pili. Sarmentose 

 shrubs, natives of North America. 



