FOSSIL FLORA. 697 



the lower large secondary, and somewhat in the teeth. The nerves are 

 also craspedodrome in P.greiviopsis. 



It is really too fragmentary and uncertain for identification, yet it differs 

 from anything else found in the collection, and is simply named in a purely 

 provisional maimer, awaiting subsequent collections. 



Habitat: West end of Fossil Forest Ridge; collected by Ward and 

 Knowlton, August 15, 1887. 



Salix varians Heer. 



PL LXXXV, fig. 3. 



Salix varians Heer: Fl. Tert. Helv., Vol. II, PL LXV, figs. 1-3, 6-16. 



The example figured certainly belongs to this species. It is the same 

 shape, but a little larger, and has the same erose-dentate margin and the 

 same midrib and general nervation. 



Habitat: Lamar River, between Cache and Calfee creeks; collected bv 

 Knowlton and Culver, August 27, 1888. 



Salix angusta Al. Br. 



Salix angusta Al. Br. Lesquereux : Tert. FL, p. IGS, PL XXII, figs. 4, 5: Cret. and 

 Tert. FL, pp. 157, 247, PL LV, fig. 6. 



This species, originally described by Heer from the Swiss Tertiary, 

 has been found by Lesquereux in the Green River group at Florissant, 

 Colorado, and in the Miocene of Oregon. A number of doubtful fragments 

 were reported from Spring Canyon in the Bozeman coal field, but they are 

 too fragmentary to be of any value. 



Habitat: Lamar River, between Cache and Calfee creeks; doubtful 

 fragments; collected by F. H. Knowlton, August, 1888; also specimens 

 No. 1967 of Hague's Park collection. 



o 



Salix lavateei Heer. 



Salix lavateri Beer: Fl. Tert. Helv.. Vol. II, p. 28, PL LXVI, figs. 1-12; FL Foss. 

 Mask., PL II, fig. 10. Lesquereux: Proc. U. S. Nat. Mus., Vol. XI, 1SSS, p. 35. 



Habitat: South end Crescent Hill, lied "2.", feet above "Platauus bed;" 

 collected by F. II. Knowlton, August, 1888. 



