184 DWABF AND SLOW-GROWING CONIFERS 



of a shrub. In Glasnevin Botanic Gardens, Dublin, are 

 two old specimens planted as seedlings : one is of normal 

 growth — an upright shrub or small tree, 12 or 15 feet high; 

 the other has made an almost prostrate mat under 3 feet 

 high and about 15 feet through. 



TSUGA, Carr. 



The hemlock firs, with the exception of the Eastern 

 North American Tsuga Canadensis, Carr., have not supphed 

 us with many dwarf forms, but one of the sj)ecies — 

 Ts. diversifolia, Masters, grows so slowly in Europe and 

 eventually makes so small a shrub, that it can be safely 

 grown in small gardens. The one dwarf form of Ts. 

 Carolimana, Engl., originated in the Arnold Arboretum. 

 So far no dwarf form of Ts. Albertiana, vSen. (syns. : Ts. 

 Mertensiana, Carr., and T. heterophyllu, Sargt.), has been 

 found, nor any of the remaining Japanese and Chinese 

 tsugas (Ts. Sieboldi, var. nanxi, hort., seems to be only 

 Ts. diversifolia in disguise) ; but of Ts. Pattoniana, Engl. 

 (syns. : Ts. Hookeriana, Carr., and Ts. Mertensiawi, 

 Sargt.), I had some interesting seedlings. They were 

 collected for me as seedhngs on the mountains in Van- 

 couver Island about thirteen years ago, and I judged 

 them to be four years, or more, of age at that time. The 

 majority of them were normal Ts. Pattoniana, and of 

 these I kept only one, which is now about 8 to 10 feet 

 high and very glaucous, but two young plants which 

 appeared to be abnormal I also retained. One of these 

 has since turned out to be a natural hybrid between 

 Ts. Pattoniana and Ts. Alhertiatia ; it is absolutely 

 intermediate, and is making a strong, healthy tree. 

 Professor A. Henry has named this one Ts. Jejfreyii, 

 and has described it elsewhere. The remaining form 

 is Ts. Pattoniana (type), and very glaucous, but so far it 

 promises to retain a dwarf habit. 



Under exactly the same conditions as the larger seedling 



