10 JOURNAL OF THE ARNOLD ARBORETUM [vol. i 



son, New Man. Rocky Mts. Bot. 129 (1909) ; in Bot. Gaz. lx. 397 (1915). 

 Rydberg in Britton, Man. 313 (1901); ed. 2, 3L3 (1905); in Mem. N.Y. 

 Bot. Gurd. I. 109 (Cat. FL Mont.) (1901); Fl. Colo. 93 (1906); Fl. Rocky 

 Mts, 191 (1917). — Howell, Fl. N.W. Am. i. G17 (1903). — Small, FL S.E. 

 States, 341 (1903). — Eastwood, Ilandb. Trees Cal. 37 (1905). — Piper 

 in Contrib, U.S. Nat. Herb, xi. 212 (Fl. Wash.) (1906). — Hough, Handb. 

 Trees, 75, fig. 86 (1907), pro parte max. — Jones, Willow Fam. 26 (1908). — 

 Robinson & Fernald, Gray's Man. 321, fig. 642 (1908). — Britton & Shafer, 

 N. Am. Trees, 188, fig. 146 (1908). — Daniels in Univ. Mo. Stud. Sci. Ser. 

 II. 247 (Fl. Boulder Colo. 99) (1911). — Sehaffner in Ohio Biol. Surv. i. 

 199 (Cat. Ohio PI.) (1914). — J. L. Henry, Fl. S. Brit. Col. 73 (VJ15). — Salix 

 [second species] Torrey hi Nicollet, Rep. U])]>er Miss. Riv. App. B. 237 (Cat. 

 PI. Geyer, 160) (1843). — S. nigra **S. ajmjgdaloidcs Andersson in S\ensk. 

 Vetensk. Akad. Handl. vi. 21 (Monog. Salic.) (1867). — • S. nigra y3. amygda- 

 hides Andersson in De CandoUe Prodr. xvi.- 201 (1868). — Porter & Coulter 

 in U.S. Geol. Surv. Misc. Publ. No. 4. 128 (Syn. Fl. Colo.) (1874). — S. 

 Wrighiii Ry<lberg, Fl. Rocky Mts. 191 (1917), ex parte, non Andersson. 

 The ty]>e of this well-kiio\\ni species came from South Dakota where it 

 was collected on the banks of the ]\Iissoiiri at Fort Pierre during the voyage 

 of Prince Maximilian Wied-Neuwied. I have not yet been able to examine 

 the ty])e, but so far as I can judge by the material from South Dakota at 

 my disposal the form of this state is identical with that of ^Missouri de- 

 scribed by (rlatfelter. Its range extends from Quebec (about 73° W. L.) to 

 central New York (Onondaga and Tompkins Counties) apparently along 

 the southern shores of Lake Erie (absent from Pennsylvania) through 

 northern Ohio (where it has been ol)served according to Sehaffner as far 

 soutli as FrankUn County) and northern Indiiina (where I have seen it from 

 Jasper and Wells Counties) to Illinois Missouri (where it is apparently ab- 

 sent from the southern part of the state), Kansas to northwestern Oklahoma 

 and the northwestern corner of Texas, but the forms of Oklahoma and 

 Texas approach the western ones which may not re})rescnt typical S. 

 amygdaloidcs. Further to the west it is found in Colorado (except })rob- 

 ably in the southwestern corner), Utah (here wanting a})parently in the 

 south) and Nevada (where, judging by the material before me, it does not 

 seem to occur in the southern and central ])arts of the state). From Ne- 

 vada the western borderline runs northward through central Oregon (Lake 

 and Wasco C'ounties), southeastern Washington (West Klickitat to Whit- 

 man County) to southeastern Prilish Columbia (eastern Kootenay according 

 to J.L. Henry). From here the northern limit of its range seems to follow 

 about the 5()th parallel to the Winnipeg region, from wlu^re it turns a little 

 to the south through soul hern Ontario and northern Quebec to Montreal. 

 On the maj) given by Hough it is shown farther north in Alberta and to 

 central Saskatchewan and central Manitoba, but I have seen no material 

 from as far north. In the soutlxvist Hough includes the whole course of the 

 Ohio in the range of S. amygdaloidcs but it is not mentioned by Porter from 

 Pennsylvania, and I have seen no specimens from the lower Ohio where it is 



