FLORA OF THE GREEN RIVER GROUP. 139 



TAXODIUM, Rich. 

 Taxodiuiii distichum iniocenuin, Heer. 



"U. S. Geol. Rep.," vii, p. 73, pi. vi, figs. l-.i-14. 



Abies Ncvadensis, Lesqx., ''Haydcirs Ann. Rep.," 187i, p. :?72. 



WIDDRINGTONIA, Endl. 

 Widdring-touia linguoefolia, sp. nov. 

 Plate XX [, Figs 14,14a. 

 Glyptostrobus Europceus, Lesqx., " U. S. Geol. Rep.," vii, p. 74, pi. vii, figs. 1, 2. 



Brandies and brantlilets short, pinnately divided; divisions alternate; braucli- 

 lets simple and slender; leaves appi-essed, irrejjularly two-ranked or subalteruate, 

 ovate, blnnt-pointed or liugulate. 



The specimens represent two forms of the same species, differing 

 merely by the size or the thickness of the branches and branchlets. The 

 more common form is figured; the otlier is more slender in all its parts, 

 a var. gracilis, mentioned in "Hayden"s Ann. Rep.," 1872, p. 371, as 

 Thuites callitriiia, Ung. 



ir«5.— Florissant. U. S. Geol. Expl. Dr. F. V. Hayden. 



THUYA, Linn. 



Thuya Garmaui, Lesqx. 

 Hayden's "Auu. Rep," 1872, p. 37-2. 



GLYPTOSTROBUS, Endl. 

 Glyptostrobus Ungeri ?, Heer. 



Plate XXII, Figs. l-6a. 



Heer, " Fl. Tert. Helv.," i, p. 52, pi. xviii ; "Fl. Alask.," p. 29, pi. iii, figs. 10, 11. 



Stem leaves sqnaniiform, appressed, lanceolate, acute or acuminate; branch- 

 leaves open, two-ranked, much longer, linear lanceolate, acute; male cone small, oval, 

 terminal; strobiles ovate on short branches; scales to 9, obtusely dentate at the 

 upper border, obscurely striate lengthwise. 



This species, obtained in fine specimens, is in some of its characters 



identical with Cufressites taxiformis, Ung., "Chloris," p. 18, pis. viii and ix. 



The diversity of the leaves in regard to their position upon the stem and 



the base of the branches, where they are shorter, appressed, and squami- 



form, is not indicated by linger. It seems also to be identical to ChamcBcy- 



parites Hardtii, Endl., as represented by Ett., "Hiiring FL," p. 35, pi. vi, 



figs. 1-21, two species referred by Schimper to Sequoia Langsdorfii, Brgt. 



The cones of the species of Florissant, however, are not those of a Sequoia 



