12 JOURNAL OF THE ARNOLD ARBORETUM [vol. i 



Idaho. Bear Lake County: Montpelier, creek bank, May 15, 1910, J. F. 

 Machride (No. 17, m. tantum; M.). Ada County: Boise, along the river, alt. 

 900 m., May 26, 1011, J. A. Clark (No. 21, fr. juv.; C, M., St.; forma t^uitum paree 

 pilosa). Washington County: Weiser, alt. 660 m., July 5, 1899, M. E. Jones 

 (No. 6545, fr.; M.). Nez Perces County: about Lewiston, alt. 240 m., June 9, 

 1896, A, A. d- E. G. Heller (No. 3201, m., f.; A., St.; forma parcissime j>ilosa). 



Washington. Whitman County: Almota, May 27, 1893, C. V, Piper (No. 

 1776, m.; C); near Pullman, Aug. 31, 1918, J. S. Jack (No. 1244, st.; A.; **15 ft. 

 high, several stems 2-3 in. diam,"). 



Oregon. Lake County: Alkali, May, 1882, Th, J. Howell (m., f.; E. M.). 



There is also a puberulous form from northwestern Texas, collected by 

 E. J. Palmer, at Canyon, along streams, Randall County, July 12, 1917 

 (No. 12517, St.; A.) and near Amarillo, along streams, Potter County, July 

 13, 1917 (No. P2538, fr.; A.); this in my opinion belongs to the typical S. 

 aviygdaloides while, as stated above, the f. pilosiuscula s. str. is a form of 

 the western S. amygdaloides wdiicli can probably be regarded as a distinct 

 variety. 



In the south w^e find the following w^ell-marked variety: 

 4b. S. amygdaloides var. Wrightii Schneider in Bot. Gaz. lxv. 14 (1918). 

 For further synonymy and literature see Schneider, 1. c.; to the quotations 

 may be added the following given under S. amygdaloides pro parte minima: 

 Sargent in 1884, 189G and 1905; Britton & Brown in 189G and 1913; Small 

 in 1903 and 1913; Ilougli in 1908, — S. amygdaloides Coulter in Contrib, 

 U.S. Nat, Herb. ii. 419 (1892), non Andersson. — S. Wrightii Rydberg, 

 Fl. Colo. 93 (1906); Fl. Rocky Mts. 191 (1917), pro parte. — Britton and 

 Shafcr, N. Am. Trees, 185, fig. 14^^ (1908), pro parte maxima. — I am not 

 yet well enough acquainted with this variety to decide the question whether 

 it is possible to keep it as a distinct species. Judging by the following 

 material ^ I prefer to regard it at present as only a variety, the geograjiliical 

 distribution of which needs further investigation, especially in southern 

 Colorado to where its range seems to extend. Wright's ^YilIow seems to 

 have also a puberulous form, but sometimes young specimens of S. Good- 

 dingii are mistaken for it. Both have tlie same yellowish branchlels, and 

 the very young leaves of var. WrigJdii do not always show the glaucescent 

 lower surface. "Where the two Willows meet there may occur hybrids as 

 it is frequently the case between S, amygdaloides and S. nigra. 



Western Texas. El Paso County: El Paso, abundant along the Rio Grande, 

 April 1851, G. Thurher (No. 195, m., f.; G., N.; 'Marge tree''); vicinity of El Paso, 

 1911, E. Stearns (No. 151, fr. im.; A.); Beleii, June 19, 1893, E. A, Mearns (Nos. 

 1510, fr.; St.; 1511, fr.; A., N.). Ward County: Parstow, bank of canal, April 14, 

 1902, S.M. Tracy ii'F.S.Earle (Nos. 52, m., ()7 f.; A.). Potter County : Amarillo 

 Creek, along the stream, May 29, 1!)02, J. Reverchon (No. 2J)2(), fr.; A.). Oldham 

 County: Magenta, "S.W. Shore of lake" (1()25) and Railroad gravel pit, August 

 26, 1910, C. R. Ball (Nos. 1625, 162G, 1(527, st.; G., M., O.; "1 ft. diam."; Ball also 

 collected seedlings, No. 1622, *'in small sandy flat back of section house." 



' Since tliis was written I have seen also the material in Herh. \s . wliicli prol^ihly contains 

 the richest collection of Salix specimens from Texas and New Mexico. It is a matter of per- 

 sonal opinion whether to regard <S. Wrightii as a species or as a variety of S. amygdaloides. 

 I prefer, however, to keep it as a variety. 



