1»20] SCHNEIDER, NOTES ON AMERICAN WILLOWS. X 81 



not, however, detect specimens bearing these numbers in Bebb's herbarium. 

 Cusick also says in the letter the following as to the differences between 

 macrocarpa {Geyeriana) and Lemmonii: " S. Lemmonii is a much larger 

 shrub, sometimes a tree 8 or 10 inches in diameter; seldom or never upright, 

 divaricately branching; growing in widely spreading clumps and commonly 

 on the bank of rocky swift running streamlets. The macrocarpa form is 

 smaller, slender and virgate; the tops gradually dissolving into small branch- 

 lets, one plant one inch in diameter is large and will be 6 to 8 feet high; it is 

 found more commonly along sluggish or marshy streams. I saw it in great 



Malheur 



Lemmonii 



Another sheet 



^ . .__, :e for 5. Scouleriana. It consists of a sterile 



specimen with old leaves measuring up to 9-11 : 4-3 cm. and bearing be- 



typical 



b. THE SPECIES OF SECTION ROSEAE 



s nroDosed bv Andersson in 1867 for the 



Andersson, S. myrtilloides Linnaeus and S, fuscescens Andersson 

 he added a number of European hybrids. The type species is 

 loides because he named the section "Stirps X. Salices roseae v. 1 



.yriil 



loidis," and later, in 1868, "§ 10. Roseae s. Myrtilloides." Andersson's 

 first species S. prolixa is a very little known Willow. The true S. myrtil- 

 loides is not found in the New Worid where it is represented by S. pedicel- 

 laris Pursh treated by Andersson as a subspecies or as a variety of S. 

 myHilhides. S. fuscescens, too, needs further study, and this section as a 

 whole is a group of rather doubtful taxonomic value. The best I can do at 

 present is to discuss briefly these American species, and to advise other 

 students who have a good opportunity to collect better material and to 

 study the plants in the field. The synonymy of the 

 Sect. Roseae (sive Myrtilloides) Andersson in Svensl 



group 



(M 



Sect 



parte, quoad S. pedicellaris. — Sect. Virentes Andersson in Ofv. Svensk. 

 Vet.-Akad. Forh. xv. 123 (1858), pro parte quoad S. myrtilloides. — Sect. 

 Myrtilloides Zabel apud Beissner, Schelle & Zabel, Handb. Laubholz-Ben. 

 30 (1903). — Sect. Argenteae, subsect. Myrtilloides Schneider, 111. Handb. 

 Laubh. I. 63 (1904). 



1. S. pedicellaris Pursh, Fl. Am. Sept. ii. 611 (1814). — Poiret in La- 

 marck, Encycl. Suppl. vi. 62 (1817). — Torrey, Fl. N.Y. n. 213, t. 120 

 (1843). — Hooker, Fl. Bor.-Am. ii. 150 (1839), quoad descr. sed probabil- 

 iter exclud. specim. —Carey apud Gray, Man. 429 (1848). — Britton & 

 Brown, HI. Fl. ed. 2, i. 602 fig. 1479 (913). — Griggs in Proc. Ohio Acad. 



Sci 



Man 



7, 324, fig. 655 (1908). — Fernald in Rhodora, XI. 157 (1909). — S. myrtil- 

 loides Tuckerman in Am. Jour. Sci. xlv. 34 (1843), non Linnaeus. — An- 



