86 UNITED STATES GEOLOGICAL SO UVEY— TERTIARY FLORA. 



GRAMINB^. 



ARUNDO, L. 



Aruqdo Goepperti!, Miinst. 



Plate VIII, Figs. 3-5. 



Arundo Goepperti, Heer, Fl. Tert. Helv., p. 62, pi. xxil, fig. 3, pi. xxiii.— Ludw., Palaoont., Till, p. 80, pi. 



xvii, figs. 1-6.— Ett., Fobs. Fl. v. Bil., p. 19, pi. iv, figs. 1-4.— Lesqx., Supplement to Annual 



Report, 1871, p. 5. 

 Cnlmites Goepperti, Miinst., Beitr., v., p. 113, pi. iii, figs. 1-3. 



Stems large, irregularly narrowly striate, marked with round knots ; leaves large, flat, with thin 

 veins, equal in distance, all of the same size. 



The large fragment of stem (fig. 3) appears, by comparison with the 

 description of this species by Heer, referable to this species. The lines cover- 

 ing it lengthwise, as also the round tubercles, irregularly distributed, are of 

 the same character as in fig. 11, pi. xxii. The longitudinal larger striae, 

 mere irregular folds pr splits of the epidermis, are not continuous. The 

 specimen of ours, of which a part only is represented, is evidently of a very 

 large stem, which, however, has been split and flattened; it does not bear 

 any trace of articulation, and therefore may represent another kind of vege- 

 table. The same may be said of the two fragments of branches or leaves 

 in figs. 4 and 5, which have the same kind of nervation as the large leaves of 

 A. Goepperti, but have no analogy whatever by their size. The surface, as 

 seen in figs. 5 a and 5 b, much enlarged, is narrowly grooved or striate, but the 

 veins are at equal distance, fig. 5 b representing them as seen enlarged twice, 

 5 o as seen enlarged eight times. The articulation and small tubercle in fig. 

 4 are characters of a branch, and not of a leaf; these fragments are found upon 

 the same specimens with those of fig. 3, and from the same localitj^ as those 

 of the following species, to which they may be referable; they are somewhat 

 inflated above the articulations. 



Habitat. — On fine-grained, buff'-colored shale, cut oif along the railroad 

 west of Green River, above fish-beds {Dr. F. V. Hayden). The specimens 

 from this locality are now very rare; those of Dr. Hayden, which represent 

 many fine and remarkable species, were obtained while the work of tearing 

 out the rocks for the construction of the railroad was in progress. My 

 own researches at the same locality, and long time after, did not afibrd any 

 discovery of importance. 



