50 THE FLORA OF THE DAKOTA GROUP. 



Salix prote^folia var. flexuosa Lesq. 

 PI. LXIV, Figs. 4, 5. 



Leaves narrow and linear, flexuous or curved-falcate to one side ; mid- 

 rib slightly stronger than in the preceding variety, texture and size about 

 the same. These leaves are similar to the two figured on PI. Ill, Figs. 3 

 and 4, which I have described as a variety of Myrka longa. 



The figure of Salix flexuosa Newbeny, in Illiistr. Cret. and Tert. PI., 

 PI. I, Fig. 4, represents this form. There are seven specimens (Nos. 446- 

 452) from Ellsworth County, Kansas, in Mr. R. D. Lacoe's cabinet. 



Salix peote^folia var. lajjiceolata Lesq. 

 PI. LXIV, Figs. 6-8. 



Leaves shorter and somewhat broader, gradually narrowed to the apex, 

 and more rapidly to the base, where they join a broad, short petiole ; median 

 nerve as in the preceding variety ; secondaries obsolete, texture of the leaf 

 the same. This form answers to the two leaves of Salix cunmta figured by 

 Newberry.^ There are twenty-two specimens (Nos. 453-474) all from Ells- 

 worth County, Kansas, in Mr. R. D. Lacoe's cabinet. One specimen has 

 the secondaries distinct, like that of Salix protemfolia Lesq.;^ but this leaf 

 is short, linear-lanceolate, agreeing in form with the var. flexuosa. It is 

 specimen No. 446 (our Fig. 4) of Mr. R. D. Lacoe's collection. 



Salix prote^folia var. longifolia Lesq. 

 PI. LXIV, Fig. 9. 



A large, long leaf with cuneate base narrowed to a long acute tip 

 (Ijroken); midi-ib thick; secondaries prominent, subopposite; texture as in 

 the other forms. One specimen from Ellsworth County, Kansas, (No. 475) 

 in Mr. R. D. Lacoe's cabinet. 



Salix Meekii Newb. 

 Later Ext. Fl., p. 19 ; Illustr. Cret. and Tert. PI., PI. i, Fig. 1. 



Salix cuneata Newb. 

 Later Ext. Fl., p. 21 ; Illustr. Cret. and Tert. PL, PI. i, Figs. 2, 3. 



Salix flexuosa Newb. 

 Later Ext. Fl., p. 21; Illustr. Cret. and Tert. PL, PL i, Fig. 4. 



1 Loc. cit., PI. I, Figs. 2 and 3a. 

 »Cret. and Tert. Fl., PI. i, Fig. 15. 



