28 MISCELLANEOUS CIKCULAE 92, U. S. DEPT. OF AGRICULTURE 



VARIETY DISTINGUISHED IN CULTIVATION 



Tsuga heterophylla latifolia Sudworth. 



* Tsuga mertensiana (Bongard) Sargent. Mountain Hemlock. 



Range. — Southeastern Alaska and southward in the mountains of British 

 Columbia to Idaho and northern Montana, and southward in Washington and 

 Oregon to California (Sierra Nevada to South Fork, Kings River) ; usually 

 above 10,000 feet; at sea level only in the region of Sitka; Nevada (Mount Rose 

 at 10,000 feet; Virginia Mountains to Davidson Mountains). 



NAMES IN USE 



Williamson's Spruce (Cal.). Alpine Western Spruce (lit.). 



Weeping Spruce (Cal.). Mountain Hemlock (Wash.). 



Alpine Spruce (Cal.). Black Hemlock (lit.). 



Hemlock Spruce (Cal.). Patton's Hemlock (Wash.). 



Patton's Spruce. Alpine Hemlock (Alaska, Wash., Cal.). 



VARIETY DISTINGUISHED IN CULTIVATION 



Tsuga mertensiana argentea (Beissner) 

 Sudworth. 



PSEUDOTSUGA Carriere 



*Psendotsuga taxifolia (LaMarck) Britton. Douglas Fir. 9 



Range. — From the Rocky Mountain region (in United States) and northward 

 to Central British Columbia; westward to the Pacific Coast and southward into 

 northern Mexico and mountains of west Texas. 



Note on nomenclature. — Formerly designated as Pseudotsuga douglasii 

 Carriere, and as Pseudotsuga mucronata (Rafinesque) Sudworth. 



NAMES IN USE 



Red Fir (Oreg., Wash., Idaho, Utah, Douglas-tree. 



Mont., Colo., and trade). Cork-barked Douglas Spruce (var. 

 Douglas Spruce (Calif., Colo., Mont.). suberosa Lemmon.). 



Douglas Fir (Utah, Oreg., Colo.). Red Spruce (Colo.). 



Yellow Fir- (Oreg., Mont., Idaho, Douglas Yellow Fir (trade). 



Wash., and trade). Oregon Fir (trade). 



Spruce (Mont.). Pacific Coast Douglas Fir (trade). 



Fir (Mont., and trade). Montana Fir (trade). 



Oregon Pine (Calif., Wash., Oreg., and National Yellow Fir (trade). 



trade). Golden Rod Douglas Fir (trade). 



Red Pine (Utah, Idaho, Colo.). Yellow Douglas Fir (trade). 



Puget Sound Pine (Wash.). "Santiam" Quality Fir (trade). 



8 There has long been belief among European botanists that our Douglas Fir represents at least two 

 distinct species, one ranging through the Pacific Slope region and eastward into the northern Rocky Moun- 

 tain region, the other being found roughly in the central and southern Rockies. Augustine Henry and 

 Margaret G. Flood (in Proc. Royal Irish Acad., vol. 35, sect. B; C2-92, pi. 12-14, 1920) propose to designate 

 the Pacific Slope form as "Pseudotsuga Douglasii Carriere," and the northern Rocky Mountain form as 

 " P. Douglasii var . caesia Schwerin;" while for the central and southern Rocky Mountain form they propose 

 the name "P. glauca Mayr." 



