16 DWABF AND SLOW-GBOWING CONIFEBS 



Thuya occidentalism var. Elwangeriana. 



T. occidentalis, var. Ohlendorffli. 



T. orientalis, var. Meldensis. 



T. orientalis, var. minima glauca. 



T. orientalis, var. intermedia. 



Works of Reference. — The following is a list of the 

 principal works of reference which have been consulted 

 in preparing the material for this book : 



Bean, W. J.: "Trees and Shrubs Hardy in the British 



Isles." 2 vols. London, 1916. 

 Beissner and others in " Mitteilungen der deutschen den- 



drologischen Gesellschaft " (quoted as "Mitt. d. d. d. 



Ges."). 

 Beissner, L. : " Handbuch der Nadelholzkunde." Berlin, 



1st ed., 1899; and last ed., 1909. 

 Carriere, E. A.: "Traite General des Coniferes." 1st ed., 



Paris, 1855; 2nd ed., 1867. 

 DaUimore, W.: "Holly, Yew, and Box." London, 1908. 

 Elwes, H. J., and Henry, A. : " The Trees of Great Britain 



and Ireland." 7 vols. 1906-13. Edinburgh. 

 Gordon: " Pinetum." London. Ed. of 1876. 

 Loudon, J. C. : " Arboretum et Fruticetum Britannicum." 



London, 1838. 

 Sargent, C. S. : " Arnold Arboretum Bulletins," vol. iv. 



1918. 

 Sargent, C. S.: " Silva of North America," vols, x.-xiv. 



Boston, 1898-1902. 

 Kent in Veitch, J. : " Manual of the Coniferse." London, 



1900. 

 Wilson, E. H.: The Garden Magazine. Boston, 1920. 



In the following descriptions the authority for the 

 name and the first description of the form are, whenever 

 they exist, invariably given; where no such authority is 

 quoted, it must be assumed either that the form is being 

 described for the first time or else that, owing to circum- 

 stances, which are usually stated, the form has had to be 

 renamed. That the sorting, fitting, and refitting of names 

 has been no easy task may be realised, when it is noted 



