4 JOURNAL 



Ra 



OF THE ARNOLD ARBORETUM [vol. i 



muli annotini distincte ruhcscentes vel purpurascentes vel tomcntelli, 

 tenaccs (tantum in S. Ilarhisonii fragiles); folia siiperne minquam stoma- 

 tifera (vel in S. Ilarbisonii seoundum costam stomatihiis plus minusve 



sparsis praedlta) 



Sect. TV. Bf^VPT.AKnT^KAF! 



12 JOURNAL OF THE ARNOLD ARBORETUM [vol. t 



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

 Macbride (Xo. 17, m. tantum; M.). Ada County: Boise, along tlie river, alt. 

 900 m., May 26, 1911 » J. A, Clark (No. 21, fr. juv.; C, M., St.; forma tcmtum parce 

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

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

 1896, A. A, & E. G. Heller (No. 3201, m., f.; A., St.; forma parcissimc pilosa). 



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

 1776, m.; C); near Pulhnan, Aug. 31, 1918, ./. S. Jack (No. 1244, st.; A.; "15 ft. 

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



Oregon. Lake County: Alkali, May, 1882, Th. J, Ilowell (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.; x\.) and near Amarillo, along streams, Potter County, July 

 13, 1917 (No. 12538, fr.; A.); this in my opinion belongs to the typical S,. 

 aviygdahiiles while, as stated above, the f. pihsiuscula s. str. is a form of 

 the western S. amygdahides which can probably be regarded as a distinct 

 variety. 



In the south we find the following well-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 }>arte minima: 

 Sargent in 1884, 1896 and 1905; Britton & Brown in 189G and 1913; Small 

 in 1903 and 1913; Hough in 1908. — S. amygdaloides- Coulter in Contrib. 

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

 Fl. Colo. 93 (190G); Fl. Rocky Mts. 191 (1917), pro parte. — Britton and 

 Shafer, N. Am. Trees, 185, fig. li'i (1908), pro i)arte 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 sj>ecies. Judging by the following 

 material ^ I prefer to regard it at ])resent as only a variety, the geograptiical 

 distribution of which needs further investigation, es]>ecially in southern 

 Colorado to where its range seems to extend. Wright's Willow seems to 

 have also a pul)erulous form, but sometimes young specimens of S. Good- 

 dingii arc mistaken for it. Both have the same yellowish branchlcts, and 

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

 lower surface. Where the tw^o Willows meet there may occur hybrids as 

 it is frecpiently the case between S. amygdaloides and S. nigra. 



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

 April 1851, G. Thurhcr (No. 195, m., f."; G., N.; "large tree'O; vicinity of El Paso, 

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

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

 1902, S.i/. Tracy &F.S.Earle (Nos. 52, m., (>7 f.; A.)- Potter County : Amarillo 

 Creek, along the stream, May 29, 1902, J. Reverrhm (No. 292G, fr.; A.). Oldham 

 County: Magenta, '*S.W. Shore of lake" (1G25) and Railroad grav<4 pit, August 

 20, 1910, C. IL Ball (Nos. 1625, 1020, 1027, st.; G., M., O.; "1 ft. diain."; Ball also 

 collected seedlings. No. 1022, "in small sandy flat back of section house." 



1 Since this was written 1 have seen also the material in Herb. W. which prol>ably 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 varie*/- 



