FOSSIL FLOUA. 69 



the lowcv Inrye secnndarv, and somewhat in the teeth. The nerves are 

 also craspedodrome in P.nrciciopsis. 



It is really too iVa^mentarj- and uncertain for identification, vet it ditl'ers 

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

 provisional manner, awaiting subsequent collections. 



Hal:)itat: West end of Fossil Forest Ridge; collected bv Ward and 

 Knowlton, August 15, 18-S7. 



Salix variaxs Heer. 



ri. LXXXV, tig. 3. 



Sali.v rarians Ileer: Fl. Tert. Helv., Vol. II, PI. LXV, figs. 1-3, 0-lG. 



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

 shape, luit a little larger, and lias the same erose-dentate margin and the 

 same midrib and general nervation. 



Habitat; Lamar River, between Cache and C'alfee creeks; collected In' 

 Knowlton and Culver, August 27, 1888. 



Salix angusta A1. \\v. 



iSalLv anyustu Al. Br. Lesquereux: Tert. Fl., p. KJS, PI. XXII, figs. 4, 5; Cret. aud 

 Tert. FL, pp. 157, 217, PI. LY, tig. 6. 



This species, originally described T)y Heer from the Swiss Tertiary, 

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

 Colorado, and in the ]\liocene of Oregon. A number of doubtful fragments 

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

 too fragmentar}- to be of anj- value. 



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

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

 No. Ifltw of Hague's Park collection. 



Salix lavateri Heer. 



,SV(/(> lavateri Heer: Fl. Tert. Helv., Vol. II, p. 28, PI. LXVI, figs. 1-12; Fl. Foss. 

 Alask., PI. II, tig. 10. Lesquereux: Proc. D. S. Nat. Mils., Vol. XI, 1S8S, p. 35. 



Habitat; South end Crescent Hill, bed 25 feet above "Platanus bed:" 

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



