158 Rhodora [AvavsT 
the herbarium.” * In spite of the differences of foliage indicated by 
Tuckerman, the American and European plants certainly simulate 
one another strongly; and Tuckerman, as above noted, was inclined 
to give little weight to the slight differences he detected and to call the 
plants identical, especially since he observed no differences in the 
aments and since Koch had stated of the European plant “foliorum 
forma valde variabilis, occurrunt scil. subrotundo-ovata, basi sub- 
cordata apice obtusissima, ovata, oblonga, acuminata, et lanceolata 
utrinque acuta." ? The conclusions of ‘Tuckerman, however, were 
not accepted by ‘Torrey who said of S. pedicellaris “a low, very distinct 
and neat species, which my friend Mr. Tuckerman thinks is not 
distinct from S. myrtilloides, Linn., but I am not yet satisfied that they 
are the same"; nor by Carey in his treatment of Salix in the first 
four editions of Gray's Manual. But in 1858 they were taken up 
without perfect confidence by Andersson, * and in the fifth edition of 
Gray's Manual (in 1867) the shrub, which up to that time had been 
generally known in America as S. pedicellaris Pursh, was treated as S. 
myrtilloides L. In 1865, however, Andersson ? indicated very clearly 
that he could not accept "'uckerman's view and treated the American 
S. pedicellaris as subspecifically separable from the European 8. 
myrtilloides; and in the Prodromus * he later kept it apart as an Amer- 
ican variety. 
In the sixth edition of Gray's Manual, Bebb took the name Salix 
myrtilloides for the commonest tendency of the American plant, with 
elliptic-obovate leaves, and set off as var. pedicellaris a shrub with 
“leaves oblong-linear or oblanceolate,” which, as we shall later see, 
could hardly have been the plant originally described by Pursh as 8. 
pedicellaris. 
In preparing the manuscript for the seventh edition of Gray's 
Manual it seemed best to restore to the American plant its earlier 
status as a species, S. pedicellaris, distinct from the Old World S. 
myrtilloides. 'The reasons for so doing may be briefly stated as follows. 
The American shrub is stouter and generally taller than the European, 
with nearly erect scattered branches; the short branches of S. myrtil- 
1 Тискегт., Am. Jour. Sci. xlv, 34 (1843). 
? Koch, De Salic. Eur. Comm. 52 (1828). 
з Torr. Fl, М. Y. ii. 213 (1843). 
* Anderss, Sal, Bor.-Am, 20 (1858). 
5 Anderss, Mon. Sal. 96 (1865). 
6 Anderss. in DC. Prodr. xvi. pt. 2, 230 (1868). 
