DESCKIPTION OF SPECIES— MONOCOTYLEDONES. 85 



the sanity lonn as in tig. 41, but much hirger, has six of these iuflated veins, 

 passing up IVuiii Ww base, parallel to the secondary veins, and the midrib is 

 there indistinguishable. As tar as tliey are known, the leaves vary in size from 

 four to sevi^i centimeters long, and from two to three centimeters wide across 

 their upper divisions. The secondary veins are very thin, scarcely distin- 

 guishable without a glass, close, nearly straight up or slightly curved to the 

 borders, forking in ascending. As remarked above, the specimen in fig. 40 is 

 obscure, the veins indistinct, and the surface variously folded in the direction 

 of the veins. Its reference to this species is not jnisitively ascertainable. 



Habitat. — Six miles above Spring Canon, near Fort Ellis {Jos. Savage). 



MONOCOTYLEDONES. 



GLUMACEiE. 



Graminetje and Ci/peracea are as yet poorly represented in tlie North 

 American Tertiary flora; not so much on account of the deficiency of speci- 

 mens as from the impossibility of determination of fragments of leaves or 

 blades whose reference, even generic, is always problematic. I have, there- 

 fore, abandoned a number of species which I had formerly described as 

 Cyperitct: Cxjperites angustior?, Al. Br (Annual Report, 1872, p. 403); C. 

 Braunianus ? , Heer (Annual Report, 1871, p. 285), which is characterized 

 especially by its tubercles, while our specimens represent merely fragments 

 of stems without them; C. Deucalionis ? , Heer (Annual Report, 1871, p. 

 285; Poacites l(Bvis, Heer (Annual Report, 1870, p. 385), etc., a fragment of 

 vvhicli traverses fig. 1 of pi. xliii. As the determination of these species is 

 still uncertain from far better specimens than those which we have in our 

 possession, and as none better of the same kind have been discovered since 

 1870, it is advisable to leave them as undeterminable until others are found, 

 which may afibrd some more light by the possibility of comparison. As seen 

 in the description of species ol' Arundo, which are represented with positive 

 characters, those of the seeds with glumes and pallets, and also of a Carex, 

 we may expect from further researches impc^rtant discoveries, and, therefore, 

 the opportunity of more evident references for the fragments which are until 

 now of uncertain affinity. 



