16 



DENDROLOGY. 



Additions to the Range of Forest Trees. 



Incense Cedar. The geographical range of incense cedar (Librocedrus decurrens 

 Torrey) is now extended 25 miles farther to the north, in Oregon, and over 

 100 miles farther to the east, than it was formerly known to exist. In connection 

 with field investigations in Oregon, E. E. Carter, of the Forest Service, discovered 

 trees of this species growing on the eastern slope of the Cascade Mountains on the 

 dry foothills southeast of Mount Hood, in townships 4 and 5, ranges 10 and 11 east, 

 at elevations of from 2,200 to 2,700 feet. Formerly this tree was known in Oregon 

 only from the North Fork of the Santiam River and southward over the western 

 slopes of the Cascades, extending eastward on these slopes only to -the Warner Moun- 

 tains. It is also known to range southward in California on" the western slopes of 

 the Sierra Nevada and Coast Range mountains, from southern Mendocino County to 

 the San Bernardino, San Jacinto, and Cuyamaca mountains; also in western Nevada 

 and in lower California on Mount San Pedro Matir. 



Sugar Pine. The occurrence of sugar pine (Pinus lambertiana) in the Sierra 

 Madre Mountains of the San Gabriel Reserve, in southern California, has recently 

 been noted for the first time by R. D. Craig, technical assistant in the Forest Service. 

 The other principal mountain ranges of southern California are known to contain 

 sugar pine, but it has never before been observed in the Sierra Madre. In the Santa 

 Lucia coast range south of Monterey, CaL, sugar pine was discovered by F. G. 

 Plummer and M. G. Goswell, of the Service, on Santa Lucia and Cone peaks, at 

 elevations between 4,000 and 4,950 feet. It has been known for some time that sugar 

 pine occurs in the Santa Lucia Range, but its exact location there has not before 

 been ascertained. 



Macnab Cypress. New groves of Macnab cypress (Cupressus macnabiana) have 

 been discovered for the first time in the Sierra Nevada Mountains of California by 

 G. E. Rutherford, formerly a Forest Guard in the Service. The discovery became 

 known by Mr. Rutherford's sending specimens for identification. He found three 

 groves near Dobbin, Yuba County, CaL, on Dry and Indiana creeks, branches of the 

 Yuba River. G. Syme, who also sent specimens for identification, recently added 

 to the number of known groves of Macnab cypress three new groves near the head 

 of Hooker Canyon in the Napa Mountains, Sonoma County, Cal. These are from 

 10 to 12 miles south of the groves heretofore known, which are mostly in the moun- 

 tains of Lake and Napa counties, Cal. 



Sitka Cypress. The late Mr. A. J. Johnson reported, shortly before his death, in 

 1903, that the Sitka or yellow cypress (Chameecyparis nootkatensis) extends 150 miles 

 south of Mount Hood in the Cascade Range of Oregon. It had previously been 

 observed in Oregon only as far south as Mount Jefferson and the valley of the San- 

 tiam River. 



California Laurel. California laurel ( Umbellularia calif ornica] has recently been 

 observed by J. I. Corbin along the South Fork of the Umpaqua River and in Coos 

 County, Oreg. This is a northward extension of from 30 to 40 miles in its range, 

 since it had previously been observed in Oregon as far north only as the Rogue River. 



These new extensions of range are exceedingly important discoveries, which came 

 to hand most opportunely for use in the preparation of a manual of Pacific trees 

 now under way. It is very desirable that other members of the Service should 

 report all observations made by them, especially on the range of western forest 

 trees. The information is needed just now to define the distribution of these trees 

 as fully as possible. 



