294 UNITED STATES GEOLOGICAL SURVEY— TEUTIAEV FI-OUA. 



tribiited in tlie flora of South America and of New Zealand, would be an 



anomaly in (hat of the upper group of the Lignitic. 



IIaiutat. — West of Florissant, near South Park, Colorado, with Ilex 



aubdenticulata, Mi/rka acumhiata, Sequoia Langadorffii, Saimidus angustifolius, 



etc. {Dr. A. a Peak). 



K li u s II a y d e n i i , Lesqz. 



Plato LVIII, Fig. l:>. 



llhui Haydcnii, Lesqx., Annual Report, 1873, p. 417. 



Leaves pinuatcly divided into alternate, linear, or narrowly lanceolate, aeute leafletH.eutireor undu- 

 late, i)bli(iiie, and slightly decurring to a broadly alate lachis ; nervation pinnate, eaniptodrome. 



The fragment, about five centimeters long, lejtrcsenting the upper part 

 of a compound leaf, has a winged rachis, three millimeters wide on each side 

 of the narrow midrib, with three jiairs of alternate leaflets, four to six milli- 

 meters broad, two and a half centimeters long, narrowly oblong-lanceolate, 

 obtusely pointed, nearly at right angle to the main rachis, to which they are 

 united in a sinus acute in the upper side, and passing downward in a curve 

 to the borders which descend parallel to the midrib. The camptodrome 

 nervation is of the same type as that of li. copallina, Linn. The alar tissue 

 of the rachis is also marked in this living species by parallel camptodrome 

 veinlets forking near the point, as in the i()ssil species. 



Habitat. — Middle Park, Colorado {Dr. F. V. Hayden). 



ZANTHOXYLEiE. 



ZAIITHOXYLON, Linn. 

 Z a 11 1 li o X y I o II j ii g 1 a la d i u u in ! , Al. Br. 



Plato LVIII, Fig. 10. 



Zanthoxylon jugJandimm, Al. Br., Stizeub. Verz., p. 87.— Heer, Fl. Tert. Ilclv., iii, p. 8G, pi. cxxvii, figs. 

 2'2-25, and eliv, fig. 3G. 



Leaflet broadly oval, distantly crenate; nervation camptodrome. 



This fragment is too incomjilcte for satisfactory identification. The 

 broadly oval form of the small leaflet and the character of the nervation 

 relate it to the European Miocene species quoted above. The curves of 

 the lateral nerves, however, are nearer to the borders, and the nervilles 

 are more distinct and less divided in our fragment. 



Habitat. — Washakie group, Wyoming {Dr. F. V. Hayden). 



AILANTHUS, Desf. 



I have not seen any fragments representing this genus in the specimens 

 froni tlie Kocky Mountain Lignitic. 'J'iiosc, however, sent from Oregon have 

 a (piantity of winged seeds rcfcral)l<' to somr of its species. 



