250 ROWLEE : NORTH AMERICAN WILLOWS 



4. SALIX MACROSTACHYA Nutt. 



S. sessilifolia villosa Anderss. DC. Prodr. i6 2 : 215. 



Shrub or small tree 1-6 meters high, often in dense thickets, 

 bark light brown, cinereous, young branches villous : leaves 5 cm. 

 long, i cm. wide, sessile, entire or nearly so, oblanceolate or 

 narrowly elliptical, acute at both ends, more or less villous pubes- 

 cent, sometimes (as in Brewer's no. 544) lanate all over : stipules 

 obsolete: aments on short, leafy, lateral branches, 2-3 cm. long, 

 densely flowered, oblong, scales densely villous all over, oblong, 

 filaments crisp, villous upon the lower half: capsules clothed with 

 long lax hairs, closely sessile : style evident : stigmas divided, 

 linear. 



Salix macrostachya leucodendroides var. nov. 



One to three meters high, wood soft : leaves much larger, 10- 

 12 cm. long, i cm. wide, densely white tomentose on both sides, 

 largest remotely denticulate : aments larger, cylindrical, 4-5 cm. 

 long, otherwise as in the type. 



Extremely broad leaved forms occur with texture and vesture 

 of 5. Bebbiana, leaves 4-6 cm. long, 1-1.2 cm. wide, ovate on 

 short but distinct petioles, twigs, leaves and capsules densely vil- 

 lous with whitish spreading hairs. 



This species has not been reported beyond the limits of Cal- 

 ifornia and Oregon. San Bernardino (W. G. Wright, nos. 6, 7, 

 10 and n), Santa Rosa to Ukiah (W. H. Brewer, no. 3854), 

 Lake Co. (E. L. Greene, no. 229), Putah Creek, Solano Co. (W. 

 L. Jepson), Narsismente River (W. H. Brewer, no. 544), Martin 

 Co. (W. H. Brewer, no. 2360), Clear Lake (H. N. Bolander, no. 

 3854). Specimens in herbaria representing this species are fre- 

 quently labelled 5. Hindsiana. From Bentham's description of 5. 

 Hindsiana, which is ample and concise, there is little doubt that 

 his specimen was 5. argophylla. 



S. integrifolia var. leucodendroides is a very striking form from 

 southern California collected by Mr. S. B. Parish, nos. 2134, 2040 

 and 640. There does not seem to be enough difference to war- 

 rant its separation as a species although intergrading forms are 

 wanting. It grows in wet soil. 



5. SALIX SESSILIFOLIA Nuttall, Sylva, I : 68. 1842 

 Salix sessilifolia Bebb, et al. (in part). 

 Shrubby or often treelike, 2-10 meters high, older branches 



