1920] 



ILLOWS. VII 1G7 



20, 1907, same coll. (No. 518, m., f.; Cal.); shores of Elisabeth Lake, about 3600 m., 

 August 15. 1916, F, J. Smiley (No. 790, f.; G.); Tuolumne Meadow, August 19, 

 1907, A, Eastwood (No. 494, fr.; CaL); same meadow, July 17, 1907, /?. A. Ware (f.; 

 G.). Tuolumne County : Summit Sonora Pass, 3200 m., August 15, 1915, A. L. 

 Grant (No. 304, fr. ; G. 321, m., fr. ; Jeps.) ; on Lambert's Dome, crevices of dry ledge, 

 3600 fn., July 20. 1907, same coll. (m.; G.); Soda Spring Canyon, above Kennedy's 

 Lake, 3000 m.. September 3, 1915, A. L, Grant (No. 470, m., fr.; Jeps.); Fort of Mt. 

 Leavitt,3500m.,August29, 1915, samecoU. (No. 417, fr.; Jeps.). Alpine County: 



Highland Lake, about 2800 m.. July 24, 1911, L. R, Abrams (No. 4751, f.; St.); 



M 



W. Eaaleston (Nos. 9044, m., 9645, f.; W 



2300 m., July 25, 1911, L. /?. Abrams (No. 4755, f.; St.); Carson Spur, about 2800 

 m,, October, 1894, G. Hansen, (No. 800, fr.; A., B., M., St.; forma incerta amentis 

 maximis ad 7.5:1.8 cm. magnis). Placer County: Summit, about 2300 m., July 

 16, 1899, A, A, Heller (No. 9842. f.; W.). Sierra County: Salmon Lake, July, 

 1899, E. C. Sidclijje (fr.; A.). ?Inyo County : Bullfrog Lake to Kearsarge Pass, 

 July 5-15, 1900, W, L. Jepson (No. 851, m., f.; Jeps.). 



Nevada. Elko County : East Humboldt Mts., about 3000 m., August, 1808, 

 S. Watson (No. 1099, f., fr.; C, N., W.); Rattlesnake Canyon near Lee Post Office, 

 about 3300 m., August 25, 1908, A, A. Heller (No. 9560, fr.; A., G., M., Reno, St.); 

 same Mts., ridge in the north side of Lamville Canyon, about 3000 m., August 8, 

 1908, same coll. (No. 9360 m., f.; W.) canyon at the head of South Fork of Hum- 

 boldt, about 3250 m., August 11. 1908, same coll. (No. 9410, f.; W.; foliis satis 

 discoloribus). 



This species is the S. glauca villosa of the Californian botanists, but it is 

 in no way related to Andersson's S. glauca villosa, which belongs to sect. 

 Glaucae (see my note ii. in Bot. Gaz. lxvi. 327), while S. orcstera seems to be 

 most closely related to S. Eastwoodiae. It differs from It by the narrower 

 leaves which are entire with the exception of the lowermost of which the 

 margin is slightly glandular, and by the longer fruits which measure up to 



-8.5 mm. in length (in S. Eastwoodiae only 6-6.5 mm.). There may be 

 hybrids between the two species. On the other hand the leaves of S. ores- 

 tera sometimes resemble those of S. Lemmonii with which I shall deal later. 

 In this species the leaves are much more glabrous, and distinctly glaucescent 

 beneath, and it has longer pedicels. 



r 



i 



Salix orcstera may also have leaves 

 with a rather pruinose under surface, and there are certainly quite a number 



forms 



A. L. Grant's No. 



fruits 



near S. Lemmonii and may be of hybrid origin. 



S. orcstera inhabits the Sierra Nevada from Sierra to Tulare County and 

 the adjacent parts of Nevada, It is a distinct species to which I wish to 

 direct the special attention of all collectors. 



b. SECT. BALSA^nFERAE 



AMien I proposed this new section in my 111. Hand. Laubholzk. i. 57 

 (1904), I did not know much of the American Willows but I had the impres- 



hahamifi 



After 



been able to study almost all the species hitherto known I still believe that 

 this species cannot be united with the other Cordatae from which it well 



