SUPPLEMENT TO THE FLORA OF MONTANA. 3 



Juniperus Virginiana, L. Red Cedar. As far as the charac- 

 ters serve to distinguish, the eastern /. Virginiana seems to be 

 fairly common in the mountainous parts of the state in the damper 

 situations, as well as on the dry exposed rocks. It has the spire- 

 shaped habit, annually maturing fruit and slender, elongated branch- 

 lets of that species, while the darker, blue-green, often glaucus 

 color of its foliage distinguishes it at sight from the widely spread- 

 ing habit and yellow-green foliage of the species common on the 

 dry plains (/. scopulorum, Sargent). The fruit of the first is prevail- 

 ingly ellipsoid, that of the second usually somewhat bilobed by the 

 enclosed divergent seeds. Apparently intergrading forms occur. 

 Bozeman, Oct. 8, 1900, E. J. S. Moore; Leonia, Sept. 14, 1900; 

 Kalispell, Sept. 9, 1899; Homestake, June 22, 1902. 



Larix Lyallii, Parl. Mountain Larch. Two small areas near 

 the head of the South Fork of the Flathead River and along the 

 higher peaks of the Bitter Root Mountains. 2ist Ann. Rep. U. 

 S. Geol. Surv. 5: 41; 2Oth Ann. Rep. 5:248, 249, 335; 336 (Ayres). 



Picea alba, Link. ; P. Canadensis, B. S. P. Common in the 

 forests west of the Divide. Called here "White Spruce". 



Essex, Aug. 21, 1896, R. S. Williams, 1085; Kalispell, Sept. 9, 

 1899; Belton, Aug. 19, 1902; St. Ignatius, Sept. 7, 1899. 



Finns contorta, Dougl. ; Rydberg, Flora, 10. There is no evi- 

 dence that the true P. 'contorta occurs in Montana and it is doubtful, 

 if the typical form is found east of the Cascade Mountains. 



Tsuga heterophylla, Sargent; T. Mertensiana, Carriere. Com- 

 mon in the forests west of the Divide. Called here "Hemlock". 

 Columbia Falls, Oct. 27, 1894, R. S. Williams; MacDonald Lake, 

 Aug. 31, 1892, R. S. Williams; Belton, Aug. 19, 1902; White 

 Pine, Sept. 8, 1904. 



Tsuga Mertensiana, Sargent; T. Pattoniana, Seneclauze. Sev- 

 eral small areas have been noted on the higher mountains west of 

 the Divide. 2oth Ann. Rep. U. S. Geol. Surv. 5: 355 (Bitter Root 

 Mts.) ; 2ist Ann. Rep. 5: 40 (Beaver Cr. east of McDonald Peak); 

 Sargent, Silva, 12: 79 (Divide between Thompson and Little 

 Bitter Root Creeks, H. B. Ayres, 1893). 



NAIADACEJE. 



Potamogeton filiformis, Pers. Gravelly Range Lake, Lewis 

 Clark Co., Aug. 1902, Owen Byrnes, No. 40. 



