JOURNAL 



OF THE 



ARNOLD ARBORETUM 



Volume I APRIL, 1920 Number i 



NOTES ON AMERICAN WILLOWS. VIII 



Camillo Schneider 



TILE 



very 



This study of the species of section Chrysaniheae is based on the same 

 material as mentioned on p. 67 of this Journal and I w-ish to express my 

 best thanks to the gentlemen in charge of these collections, and also to Pro- 

 fessor J. K. Henry, Vancouver, and to Mr. J. C. Nelson, Salem, Oregon. 

 I am not sure whether the following species should be combined in one 

 section, nor am I convinced that Chrysantheae is the correct name for such 

 a section. It has been proposed by Koch for a erouo containinir n ^\T,cr\^ 

 species : S. lanata Linnaeus. This is a 



Europe and Asia but is not found in the New World. ' Ibelieve, however, 

 that species like S. Richardsonii Hooker are rather closely related to it. I 

 place, therefore, this American species and the related S. calcicola Fernald 

 and S. Barrattiana Hooker in this section. Andersson did the same in 1868, 

 uniting S. lanata, S. Richardsonii and S. Barrattiana into a subsection 

 Lanatae of his section " Niveae s. Glaucae." He cites Koch's name Chry- 

 santhae (!) as a synonym. Andersson also added S. Ilookeriana Barratt to 

 the same subsection; he placed, however, 5. speciosa Hooker & Arnott (now 



* Coville) in a second subsection B. Villosae. This last subsec- 

 tion contains, besides some European species and a number of hybrids the 

 American S. Candida Flugge. The affinity of the Hoary Willow is by no 

 means certain. Kiihne (1893) referred it with S. Elaeagnos Scopoli (S. 

 incana Schrank) to section Incanae Andersson while Ball (1909) placed it 

 near S. brachycarpa Nuttall in his section Arcticae. I shall deal with S. 

 Candida later as I regard it a representative of a special group. 



As to the affinity of >S. Ilookeriana I can only state that it might be 

 taken for a distinct type which combined with S. Piperi Bebb, S. amplifolia 

 Coville, S. alaxensis Coville and S. laureniiana Fernald may fonn a sepa- 

 rate section. I think it best, however, at present to place all these species 

 in the same group with S. Richardsonii and S. Barrattiana. A closer study 



> Lange, Consp. Fl. Groenl. ii. 28 (1887), cites: "221. S. lanata (chrysanthos) L V Gr ■ 

 Narsarsuk- og Kvanefjord ved Godthaab (Raben)." He adds however the followiug note! 

 "Obs. Specimina in his locis lecta in herbariis desunt, quare incertum videtur, an recte de- 

 terminata sit." 



alaxensis 



