1924] Extensions of Range and new Variety in Salix 135 
EXPLANATION OF PLATE 145. 
Coleus plant parasitized by Orobanche ramosa L. Fic. 1, Coleus plant; 
figs. 2, 3, and 4, very small Orobanche plants attached to Coleus roots; fig. 
5, a small flowering plant of Orobanche; fig. 6, a larger detached Orobanche 
plant not fully developed. Natural size.—Photo by W. R. Fisher. 
EXTENSIONS OF RANGE AND A NEW VARIETY IN SALIX. 
CARLETON R. BALL. 
Our knowledge of the distribution of species, and of their numerous 
variations increases steadily. Amateur, subprofessional and pro- 
fessional botanists all have contributed largely to this result. The 
writer has been most fortunate in having had opportunity to study 
and identify many of the willow collections from all classes of botanists 
in the United States and Canada. This has given rise to a series of 
papers! describing new species and varieties, and recording extensions 
of range. 
In the third? of these papers the willows of the Black Hills of South 
Dakota were discussed chiefly in the light of recent collections made 
by John Murdoch, Jr., T. C. Setzer, and N. E. Petersen, of the U. S. 
Forest Service. Of the 12 species listed, the one recorded as S. 
fluviatilis Nutt. is S. interior Rowlee, the Nuttall plant being confined 
to the lower Columbia River.’ 
In addition to the 12 species recorded for the Black Hills district, 
cordata occurs in the eastern portion of the State. To these 13 species, 
the present paper adds to the known flora of South Dakota 3 species, 
missouriensis, petiolaris and candida, and a new variety of discolor. 
This makes a total of 16 species of Salix recorded for the State. 
1 Ball, Carleton R. Notes on North American Willows I-III. Bot. Gaz. 40: 376- 
380, pls. 12-13, 1905; ibid. 60: 45-54, figs. 3, 1915: and ibid 60: 391-399, 1915, res- 
pectively. 
— ——.——————Undescribed Willows of the Section Cordatae. Bot. Gaz. Tl: 426- 
437, fig. 1, 1921. 
— — — — Notes on Willows of the Sections Pentandrae and Nigrae. Bot. Gaz. 
12: 220-236, figs. 1-4, 1921. 
and Kirk Whited. Pruinose Branchlets and Salix lemmoni Bebb. Am, 
Jour. Bot. (in press). 1923. 
? Bot. Gaz. 60: 391-399, 1915. 
3 Ball, Carleton R. Notes on North American Willows II. Bot. Gaz. 60: 52-54, 
1915. 
