1921] 



WILLOWS, XII. 83 



May 



July 20, 1916, (nos. 8638, 8639, f., 8640 m.; A.) which may represent 

 forms of such a hybrid. They need, of course, further observation. 



S. Geyeriana var. meleina x S. sitchensis. See J. K. Henry, Fl. S. Brit. 

 Col. 98 (1915). I have seen one of Henry's specimens. 

 S. Glatfelteri Schneider. See S. amygdaloides X nigra, 

 S. glaucops x S. monticola. See Rydberg in Bull. Torr. Bot. Club, 



303 (1912). 



eudo 



lapponum Von Seemen. I have not seen Garrett's no. 1671 from Utah, 

 Big Cottonwood Canyon, Salt Lake County, August 23, 1905, which 

 Rydberg takes for this hybrid. 



? S. Gooddingii x S. laevigata. This hybrid seems to occur occasion- 

 ally in California. See for instance A. A. Heller's no. 7950, Shasta Coun- 

 ty, on rocky banks of the Sacramento between Middle Creek Station and 

 Keswicke, June 3, 1905 (fr.; A., St.; "a symmetrical shrub about ten 

 feet high"). Needs further observation. 



? S. Gooddingii x S. lasiandra. Such a hybrid may be represented by 

 C. R. Ball's No. 1954, Calif. Univ. Farm, Davis, along Putah River, June 

 12, 1915 (fr.; G.; as S. lasiandra). 



S. Grayi Schneider. See S. argyrocarpa x planifolia. 



S. Hankensonii Dode. See S. alba x nigra. 



S. herbacea X S. Uva-ursi. This is S. Peasei Fernald. See Schneider 

 in Bot. Gaz. lxvii. 51 (1919). 



S. humilis X S. petiolaris. Observed by Forbes and mentioned by 

 Knowlton and Deane in Rhodora, xvi. 108 (1914). 



S. humilis x S. sericea. See Rhodora, xvi. 108 (1914). 



S. humilis x S. tristis. See Rhodora, xvi. 108 (1914). 



? S. laevigata X S. lasiandra. A hybrid probably occasionally met 

 with in California. Compare for instance A. A. Heller's No. 5329, Son- 

 oma County, near Windsor on Russian River, April 3, 1902 (in., f.; G.), 



and No. 10849, Plumas County, near Marton Station, June 13, 1913 

 (fr.; G.). 



Wardii x S. nigra. 



Mo 



Gard. ix. 49 (1898). As Ball stated the same cross is represented by 

 Ball and Griggs, no. 64, from Washington, D. C, Canal at High Island, 

 August 16, 1902 (st.). 



S. lucida var. intonsa x S. nigra. According to Fernald in Herb. 

 Gray his No. 1682, from New Brunswick, Westfield, Ingleside, river 

 bank, with the parents, August 6, 1909 (fr. im.; G.) represents this hybrid. 

 I believe that the interpretation of this excellent observer is correct. 



? S. monticola x S. pseudolapponum. I am inclined to regard as such 

 a hybrid J. G. Jack's specimens from Colorado, Pike's Peak, wagon road, 

 about 3600 m., August 30, 1898 (fr.; A.). 



S. myricoides Muhlenberg. See S. cordata x sericea. 



S. neo-Forbesii Topffer. See S. petiolaris x sericea. 



