1924] Extensions of Range and new Variety in Salix 139 
(Ball & Over 2240). Cornus stolonifera Michx. was common in the 
immediate vicinity, as were also such grasses as Agrostis palustris 
Huds., Poa palustris L., and Panicularia nervata (Willd.) Ktze. 
SALIX MISSOURIENSIS IN SOUTH DAKOTA. 
Salix missouriensis Bebb! was first described by Andersson as S. 
cordata vestita from a specimen collected by the Duke of Neuwied 
near Fort Osage on the Missouri River. The recent manuals of botany 
do not give it an extensive range. Gray’s New Manual? says “ Mo. to 
Nebr. and I. T.,” while Britton and Brown,’ and Britton? say “Mo. 
and Nebr." The writer? in 1899 recorded its oecurrence in eastern 
Iowa, near Muscatine and Davenport, and at Sioux City in North- 
western Iowa. 
Material in various herbaria shows the species to be distributed in 
Missouri and the eastern parts of Kansas and Nebraska, and along 
the Missouri River in Iowa as far as Sioux City. Typical material 
collected by E. J. Palmer in extreme southern Illinois is in the National 
and Arnold Arboretum herbaria. Sterile specimens from Jo Daviess 
County in northwestern Illinois almost certainly belong here. Sioux 
City, Iowa, has been the northwestern limit of its recorded range. 
In 1922 and 1923, Prof. W. H. Over, of the University of South 
Dakota, collected willows in the southeastern part (Clay Co.) and in 
the northeastern part (Grant, Day, and Roberts Cos.) of the State, 
and sent them to the writer for identification. Inspection of this 
material, mostly foliage specimens, showed that it represented mis- 
souriensis rather than cordata, though it was far to the north of the 
accepted range of missouriensis. 
Early in August, 1923, the writer had the opportunity to join 
Professor Over for a short time in an exploration of the eastern portion 
of Roberts County, South Dakota. A study was made of the willows 
(1) along the west shore of Big Stone Lake, (2) near the south end of 
Lake Traverse, and (3) in the coulees of the Sisseton Hills, some 5 
miles west of Sisseton, the county seat of Roberts County. Here the 
most abundant species of the cordata group was S. missouriensis, 
previously collected in Roberts County in 1922 by Professor Over. 
! Andersson, N. J. Kongl. Vet.-Akad. Handl. 6: (Monog. Sal.) 159, 1867. 
? Robinson, B. L., and M. L. Fernald. Gray's New Manual Bot. 323. 1908. 
š Britton, N. L., and Addison Brown. Illus. Flora 1: 503, 1896. 
* Britton, N. L., Man. Bot. 314-315, 1901. 
š Ball, Carleton R. The Willows of Iowa. Proc. Ia. Acad. Sci. 7: 153, pl. 12, 1900 ` 
