1920] SCIIXEIDER, NOTES ON AMERICAN WILLOWS. VIII 231 



M., N., W.; ovariis exparte pilosis ad var. idahoensem spectans); BerLlioud Pass, 

 west slope, July 29-30, 1918, D. M. Andrews (No, 28, st.; A,; ut praecedcns). Jack- 

 son County : on Grizzly Creek, alt. 2800 m . , July 24, 189G, C. F. Baker (Rowlee 

 Nos. 11, 12, and 13; st.; M., N.); ? same County,North Park, May 31, 1898, G. E, 

 Ostcrhout (No. 1585, in., f.; N.) ? La Plata County : Vicinity of Mt. Carbon, 

 along creek, alt. 900 m., July 15, 1910, J. Tidestrom (No. 3070, fr.; W.; ''shrub 1 m. 

 high; fructibus glabris, foliis ut in var. idahoensi)\ Mt. Carbon, June, 1909, A". L. T. 

 Nelson (No. 55, fr.; N.); Eagle County: Wolcott, A. Eastwood (m., C. sheet 

 457948). Routt County: Flat Top Mts., June, 1891, A. Eastmod (No. 19, m., 

 f.; C). ? County: without exact locality and date. Hall & Ilarhoiir (f.; sheet 



3G73G0 in C.) 



Wyoming. Albany County : Medicine Bow Mts., Nash's Fork, July 28, 1900, 

 A. Nelson (No. 7780, f.; Cor. G., N., W.); Wood's Creek, August 11, 189G, same coll. 

 (No. 2079, St.; Cor.). Fremont County: Wind River, 1873, C. C. Parry (No. 

 2G3, m., f.; C, G.). Sheridan County: Bighorn Mts., Headwaters of Tongue 

 River, July, 1898, F. Tweedy (No. 88, fr. juv.; N.); same place, about 3050 m., 

 July 13, 1900, J. G. Jack (fr.; A.); Pincy and Beaver Creeks, alt. 1000 m., July 22, 

 31, 1900, C, C. Cwrtis (fr.; N.). Lincoln County : Teton Forest Reserve, Buffalo 

 Fork, about 3200 m., August, 1897, F. Tweedy (No. 297, fr.; N.); Jackson's Ilole, 

 common on low grounds near Gros Ventre River, July 15, 1901, Merrill cO TT';7cox 

 (No. 941, fr. submat.; C, G., M., N., W,), Yellowstone Park : Swan Lake Flat, 

 July 9, 1902, E. A. Mearns (No. 1GG6, f.; N.; in W. ad var. idahoensem vcrgcns); 

 same locality, June 9, July 9, 1902, E. C. Smith (m., f.; fr.; C); without exact local- 

 ity, July 13, 1902, Mearns (No. 1833, fr.; W.); Mammoth Hot Springs, abundant in 

 extended patches on low flats, July 3, 1899, A, & E. Nelson (No. 5G55, f.; G., M.; in 

 W. deternnned var. idahoensis by Ball); Norris Geyser Basin, September 7, 190 1, 

 A. Rchder (st.; A.); same place and date, J. G, Jack (st.; A.). 



There has ])een described by Ball a S. WoJfii var. idahoensis in Dot. Gaz. 

 XL. 378 (1905); apiid Coulter & Nelson, Ncav Man. Rocky :\Il.s. Bot. 134 

 (1900), which Rydberg (Fl. Rocky Mts. 197 [1917]) made a species S. 

 idahoensis. It has been named S. glauca var. villosa by various authors 

 dealing with tlic flora of the Rocky Mountains, and I have found it in dif- 

 ferent herbaria under the name S. Cusickii Rowlee which so far as I know- 

 has never been published. Ball said about var. idahoensis: " The relation- 

 ships of this little willow are all with S, Wolfii Bebb, from the typical form 

 of which it differs mainly in the silky-pubescent capsule and the rather more 

 silky leaves. The different specimens show considerable variation in the 

 amount of pubescence on the capsules, in general, the specimens from the 

 northwestern localities, show the denser pubescence, both on leaves and 

 capsules. In some cases they tend toward a glabrate condition In age. In 

 S. Wolfii the capsules are glabrous even when young. This variety is found 

 from the Yellowstone Park northwestward across Montana and Idaho 

 to eastern Oregon. The species is found from central Colorado to ^Montana 

 and Idaho." 



After 



Ifi 



characters: gemmae magis conicae, ad 9 mm. longae, atrobrunneae; folia 

 infima minima saepius subtiliter glanduloso-dentieulata, majora superjora 

 lanceolata, oblanceolata vel elliptico-lanceolata, apice obtusa ad rotunda, 

 basi saeplsslme sensim acute, 2.5:0.6 ad 5 (-6) :1. 5 (-2) cm. magna, utrinque, 



