1020] SCHNEIDER. NOTES ON AMERICAN WILLOWS. X 71 



that species to the Black Hills willow." I have seen a great number of 

 specimens from the Yukon Territory collected by Miss Eastwood which 

 partly can be regarded as var. perrostrata, and partly can hardly be dis- 

 tinguished from typical S. Bebbiana. Some are very glabrous. I have not 

 yet seen the Alaskan material mentioned by Coville. What I call var. per- 

 rostrata seems to be the form prevailing from western Nebraska and western 

 South Dakota through Colorado, northern New Mexico, eastern Arizona, 

 Utah, northeastern Nevada and northeastern Oregon; this form apparently 

 is becoming more similar to or is connected with the typical form by many 

 intermediate forms in Idaho, Washington, British Columbia, Alberta, 

 eastern Alaska (Cook Inlet, according to Coville), the Yukon Territory and 



parts of the Northwestern Territories. The typical S. Beb- 

 biana seems to be predominant from Fort Franklin in the Northwest Ter- 

 ritories to the James Bay and to Newfoundland, its range extending to 

 the south to New Jersey, Pennsylvania, northern Ohio, northern Indiana, 

 northern Illinois and Iowa. Very often it is almost impossible to decide in 

 the herbarium whether a specimen belongs to var. perrostrata or to the type. 

 Only a thorough study of copious material collected in those regions where 

 both forms meet can prove whether var. perrostrata is a variety of real 



estem 



taxonomic value. 



Mountai 



representative of the species, and says that the leaves are less rugose or 

 almost plane and glabrate in age, and the branchlets glabrate or quickly 

 glabrescent. Its synonymy is as follows : 



Bebbiana 



S. Bebbiana Rydberg 

 in Contrib. U. S. Nat. Herb. in. 523 (1896), pro parte maxima, non Sar- 

 gent. — Coville in Proc. Wash. Acad. Sci. iii. 306, fig. 17 (1901), pro parte 



maxima. 



Man 



(1917). 



(1909) pro parte maxima. — S. perrostrata Rydberg in Bull. N.Y. Bot. 

 Gard. ii. 163 (1901); in Britton, Man. 317 (1901); Fl. Rocky Mts. 195 



— Britton & Brown, 111. Fl. ed. 2, i. 599 (1913). — S. rostrata var. 



ita Fernald in Rhodora, xvi. 177 (1914). — A typo praecipue re- 

 cedit foliis maturis etiam superioribus subtus fere vel omnino glabrescenti- 

 bus laevioribus plerisque minoribus saepe tenuioribus, ramulis saepissime 



magis glabrescentibus. 



In Colorado and New Mexico certain forms seem to occur of which the 

 branchlets are somewhat pruinose. I enumerate the following specimens 

 which need further observation. 



Colorado. Teller County: Colorado Springs, Pikes Peak, September 10, 

 1905, Glatfelter (st.: M.). El Puso County: Manitou, about 3300 m., September 



M 



Manitou 



Engelmann (st., M.; forma incerta satis pubescens). 



M 



May 



(No. 3524, f.; M.); Santa Fe Creek above 



» A form with entirely glabrous ovaries and pedicels has been collected by Macoun, Cabin 

 Creek, Jasper Park, Alberta (No. 95792, O). 



