12 JOURNAL OF THE ARNOLD ARBORETUM [vol. ii 



glabrous ^\lion mature llicy still show a minute brown ])ubescence on the 

 lower surface. The branehlets are more or less slender, browni-red, and 

 those of the preceding year may be rather glalirous or show only remnants 

 of puliesrence. The male flowers apparently have glabrous filaments like 

 lh( sc of specimens collected by Spreadborough at Departure Bay, V.I. 



Of this typical variety forms with very small oblanccolatc leaves and 

 others with very short and small aments are frequetitly found. Besides 

 tluse tlee is the form called yht. Jlavescetis by Henry which is as I have 

 already exiilained probably not Nuttall's Jlarcscens. I have named it in 

 difTerent herbaria var. poikila ^ but I am not sure wlu'ther it really is 

 more than an ecological form. It is characterized by foliis suijcrioribus 

 saei)issime ultra G ad \Q~l-2 cm. longis, oblongioribus saei)e utrincjue acutis, 

 subtus magis tomentosis vcl griseo-pilosis, amentis satis crassioribus longiori- 



busquc, stigmatibus plusminusve distincte sessilibus 1.5-2 mm. longis. 



Such forms I have seen from "U ashing^on, British Columbia, and the Yukon 

 Territory. There are somewhat similar s])ecimens befure me from Utah 

 (Ogden Canyon). Very often offshoots of the typical form show the same 

 characters of the leaves. 



A more distinct variety seems to be 



S. Scouleriana var. crassijulis, comb. nov. — S. hrachstachys Bentharn, PI. 

 ITartweg. .S.'JG (18o7). — {S. Caprca *) C aprco ides Andcrssniim Ofv. Svensk. 

 Vct.-Akad. Furh. xv. 120 (1858); in Broc. Am. Acad. iv. 60 (Sal. Bor.-Am. 

 14) (1858); in Walpers, Aim. Bot. v. 748 (1858), pro specie. — S. brachy- 

 ffachys * S. Scouleriana crassijulis Andersson in Svensk. Vet.-Akad. 

 Ilandl. VI. 83 (Monog. Salic.) (18G7). — >S. hrachysiachys ^ Scouleriana 2 

 crassijulis Andersson a])ud De Candolle, Brodr. xvi.^ 225 (1868). 



/ 



& Forest, VIII. 37S (1895). 



S. Nuliallii var. caprcoidcs Sargent in Card. & Forest, vill. 463 (1895). 

 S. NuitoUii var. brachystachjs Siir^cni, Silva, ix. 142, t. 483 (1896). — S. 

 Scouleriana \ur. hrachyslachya (!) Jones, Willow Fam. 15 (1908). — It may be 

 briefly characterized as follows: frutex vel arbor ramis satis brevibus diva- 

 ricatis tortuosis, etiam ramulis vetustioribus i)lusminusve tomentellis; ra- 

 nmli hornotini annotinique satis tomentosi; folia satis parva, obovata, vix 

 ultra 6:3 cm. magna, subtus plusmiiuisve dense pubescentia (saltern juniora, 

 adultiora satis rufcsccnti-})ilosa) ; amenta fructifera ad 4:1.7 cm. magna, 

 styli subnulli stigmatibus circ. 1.5 mm. longis ultra 4-plo brcviores; fila- 

 menta glabra vel basi sj)arse pilosa; fructus fere 8 mm. longi pcdicello ad 

 2 mm. longo excluso. 



This variety seems to be restricted to California (Santa Cruz, Monterey, 

 and i)robaI)ly San Benuirdino County) but some forms from Oregon (for 

 instance Sheldon's no. 11627/8, Portland) look very similar. There may l)e 

 intermediates between var. typica and var. crassijulis and the forms of the 

 Rocky Mountains from British Columbia to New Mcxicf) and of the Sierra 

 Nevada which represent the typical S. flavcscens. In 1899 Ball distin- 

 gui.'.hed the typical S. Jlarcscens from var. caprcoidcs Bebb which is our 



^ Derived from voidXos, intricate, chargeable. 



