30 



has not been reported in the high mountains of Okanogan and Stevens counties, 

 in the northeastern part of the State, although it appears in northern Idaho 

 and Montana and has been seen in the southeastern corner of Washington on a 

 single peak of the Blue Mountains, as well as near by in the Powder River 

 Mountains of Oregon. The most eastern occurrence reported is in the Cascade 

 Range of Washington, on an island in the Stehekin River about 5 miles above 

 Lake Chelan, where it was noted in 1900 by George B. Sudworth and in 1905 by 



E. E. Carter. 



In southern Oregon its range was extended in 1899 to the Siskiyou Moun- 

 tains by J. B. Leiberg, where it was observed also by W. T. Cox in 1903 and 

 by C. J. Buck in 1906, while in northern California its presence on the high 

 ranges between Shasta Valley and Butte Creek, north of Mount Shasta, was 

 recently discovered by R. T. Fisher. R. B. Wilson reported it in the Kla- 

 math National Forest in 1904. Nothing is known concerning its distribution 

 there, however, beyond the fact that it occurs on the Siskiyous and on the 

 range west of Crescent City, where it was reported by A. J. Johnson in 1898. 

 It is also known to occur in the Trinity Mountains, but so far only at the head 

 of Canyon Creek, where Miss Alice Eastwood found it in 1902. 



In the Sierra Nevada alpine hemlock is known at only one place on the 

 eastern slopes, which is on the head of Owens River, a station discovered by 



F. V. Coville in 1891. It may possibly be discovered at other points on the 

 east side, but it is doubtful. A very considerable and rather remarkable exten- 

 sion into the San Jacinto Mountains of southern California has been made re- 

 cently by George B. Sudworth, who recognized this tree in a photograph taken 

 by T. B. Lukens in 1900. The southern limit of alpine hemlock in the Sierras 

 is on the head of Bubbs Creek (latitude 36 45') while the San Jacinto Moun- 

 tains are some 200 miles south of that point. The photograph shows a single 

 large tree on Wellman Flat (T. 5 S., R. 4 E.) at an elevation of 7,500 feet. 

 Doubtless other trees are to be found at this and other high places in these 

 mountains, in which it is hoped full observations can be made soon. 



The occurrence of alpine hemlock in northern Idaho and Montana is very 

 limited. In Idaho it is known only in the Cceur d'Alene Mountains northward 

 to the divide between the North and the South Forks of Co?ur d'Alene River, 

 where it was noted by J. B. Leiberg in 1897, and in the Bitter Roots on the 

 divide between the North Fork of the Clearwater and the Lochsa River, being 

 found here also by Mr. Leiberg in 1900. In Montana only two small groves- 

 are known, one on an eastern spur of the Coeur d'Alene Mountains, between 

 Thompson and Little Bitter Root Creeks, where it was seen by H. B. Ayres in 

 1893. The other station is on the west side of the Continental Divide at the 

 pass between the Swan and the Clearwater rivers, where Mr. Ayres found 

 it in 1899. 



Alpine larch (Larix lyallii). The little-known range of this larch has been 

 considerably extended southward in Montana through the recent observations 

 of W. G. Weigle, Coert Du Bois, and R. V. R. Reynolds. In 1905 Mr. Reynolds 

 noted it in the Missoula National Forest west of the Clearwater River, an 

 extension southwestward of about 30 miles from the southernmost station 

 previously known, which is near Pend d'Oreille Pass in the Lewis and Clark 

 National Forest. Mr. Du Bois observed it in 1904, and Mr. Weigle in 1906, 

 still farther south on the highest mountains of the Big Hole National Forest 

 Mr. Weigle, however, traced it southward to Mount Haggin (about 6 miles 

 southwest of Anaconda), a point at least 75 miles south of the previously 

 recorded southern limit. 



