ENUMERATION OF CONIFERS 



219 



T. dolobrata, Sieb. & Zucc. (7". dolobrata var. australis, Henry. Thuja 

 dolobrata, L.). Hiba Arbor-vit^. Fig. 43. Pyramidal tree attaining 50 

 feet, or sometimes shrubby; bark thin, reddish-brown, fissured longitudinally 

 into long narrow strips; branches 

 irregularly whorled or scattered, 

 horizontally spreading and often nod- 

 ding at the ends; branchlets ^-^ 

 inch broad: leaves glossy green 

 above, marked with a broad white, 

 band beneath, those of the upper 

 and under side obovate-oblong, ob- 

 tuse, adnate except at the apex, the 

 lateral ones spreading, ovate-lanceo- 

 late and curved (hatchet-shaped), 

 obtusish: cone globose-ovoid, about 

 3^-f inch long; scales with a promi- 

 nent, often curved umbo below the 

 apex. Central Japan. — Introduced 

 to Holland in 1853; to America in 

 1861 by Dr. G. R. Hall. It has not 

 proved very successful in the Eastern 

 States and is not hardy much farther 

 north than New York, though at 

 Mattapoiset, Cape Cod, some fine 

 specimens are growing. When well 

 developed it is a handsome tree of 

 dense, broad-pyramidal habit, with 

 bright green lustrous foliage. 



Var. variegata, Fortune. Whitetip 

 Hiba Arbor-vit^. Tips of branch- 

 lets creamy-white. 



Var. nana, Sieb. & Zucc. (T. 

 leetevirens, Lindl.). Dwarf form, with more slender and narrower branchlets 

 of a lighter green. 



Var. Hondai, Makino {T. Ilondai, Henry). Tree to 70, or occasionally to 

 90 feet tall; branches more densely ramified and the branchlets placed close 

 together and overlapping one another by their edges more than in the type: 

 leaves smaller and whiter beneath: cone subglobose, f-^ inch across; 

 scales less thickened at the apex and with the umbo reduced to a short mucro 

 or narrow ridge. Northern Japan. — Introduced to the Arnold Arboretum in 

 1915 by E. H. Wilson, but has not proved hardy in Massachusetts, though 

 it may be somewhat hardier than the type. 



43. Thujopsis dolobrata. 



