1909] ernald,— Salix pedicellaris and its Variations 157 
men was collected in the mountainous region about Santa Fe, where 
the expedition encamped for several weeks, or at least within the present 
limits of New Mexico, rather than in the desert region of northwestern 
Texas, through which the route lay after the ninth of September. 
' station cited in Wiegand's paper is, of 
The second ‘Arkansas’ 
course, erroneous also. The Hayden specimen from the upper 
Platte must have been collected in western Nebraska, northern 
Colorado or Wyoming. If any herbarium contains a dated duplicate 
of the specimen in the Gray Herbarium, it might perhaps be accurately 
localized by referring to the lists published in several volumes of the 
Reports of the Hayden Survey. Since the specimen is the type of the 
species, this would be well worth while. 
It is unfortunate that these geographical slips should have been 
perpetuated by Buchenau (Pflanzenreich, iv. 36, p. 120), in a manner 
which affords no clue to correcting them,— “Bis jetzt nur bekannt aus 
Arkansas (Marcy, Hayden) und Idaho (Heller n. 3410).” 
CAMBRIDGE, MASSACHUSETTS. 
SALIX PEDICELLARIS AND ITS VARIATIONS. 
M. L. FERNALD. 
THE attractive bog willow, which for several decades passed in 
America as Salix pedicellaris Pursh, was considered by ‘Tuckerman ! 
to be identical with the European S. myrtilloides L., although with the 
concessions that “the Lapland plant is less inclined to be glaucous” 
and is "distinguished by the broad, often cordate base of the leaves, 
a habit which I have never observed in ours"; * and with the further 
comments that “Fries truly calls it elegant; noticing also, as does 
Wahlenberg, its resemblance in habit to Vaccinium uliginosum. It 
being a very northern and remarkably broad-leaved state of the species, 
which suggests this comparison, it is not surprising that our much 
larger and narrower-leaved form should not so well compare with our 
exclusively alpine and small-leaved form of the Vaccinium. Fries 
remarks upon S. myrtilloides, that its leaves do not easily blacken in 
drying: this is also true of our plant, which preserves all its beauty in 
1 Tuckerm., Ат, Jour. Sci, xlv. 34 (1843). 
