224: 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



the upper ones more or less dilated ; leaYes on the flowering 

 branches 5- 7- 9-foliolate ; stems erect ; prickles straight, rarely 

 hooked, regularly placed in pairs mingled or not with aciculi, 

 or numerous, straight, more or less, setaceous, alternate, rarely 

 absent. 



B. cinnamomca, Linnaeus, 1702. — Europe, Northern Asia. 



B. d la v uric a, Pallas, 1788. — Northern Asia. 



B. nutlcana, Presl, 1851. — North America. 



B. pisocarpa, A. Gray, 1872 (? JX. Woodsii, Lindley, 



1820).— North America. 

 B. rugosa, Thimberg, 1781. — Asia. 



B. califomica, Cham, and Schlecht., 1827. — North America. 

 B. laxa, Retz., 1803.— North Asia. 



B. Bcggcriana, Schrenk, 1811 (E. anserinasfolia, Boissier, 



1845).— Asia, 

 B. Albcrti, Kegel, 1883.— Asia. 

 B. gymnocarpa, Nuttall, 1840. — North America. 

 B. macrophylla, Lindley, 1820. — Asia. 

 B. Webbiana, Wall., 1839.— Asia. 



B. blanda, Aiton, 1789 (R. virginiana, Miller, 1768).— 



North America. 

 B. acicularis, Lindley, 1820. — Northern Europe, North 



Asia, North America. 

 B. alpina, Linnreus, 1762. — Europe. 



This large section may be subdiYided into several subsections. 

 We abstain in this place from making any further observations 

 upon them. 



B. cinnamomca has been grown for many centuries in a 

 double-flowered variety (B. fcecundissima, Munch.). 



B. rugosa is becoming more widely spread in cultivation. It 

 is a magnificent type, on account of its foliage and its large 

 corolla. Double varieties have been obtained from it. It has been 

 successfully crossed with some of the Indices and other species. 

 Crossed with 7/. multiflora it produced B. Iwara, Siebold. 

 It is possible that B. Icamtchatica, Vent. (1799), is only a variety 

 of this species. 



In the gardens of Turkestan a double variety of B. Bcggcriana 

 is in cultivation. 



It. Webbiana has been found with double flowers in Thibet. 

 B. alpina has furnished us with several double varieties. 



