54 UNITED STATES GEOLOGICAL SURVEY— TERTIARY FLORA. 



to a short pedicel half a centimeter broad. This basilar conformation shows 

 it to be a leaflet of a very large pinna. 



Habitat. — Raton Mountains, near Trinidad, New Mexico ; Golden, Col- 

 orado, where it is not rare, mostly found in fragments. The figured specimen 

 is from this last locality. 



WOODWAEDL&, Sm. 



^Voodwardia latiloba, Lesqz. 

 Plate m, Fig. 1,1a. 



Woodwardia latiloba, Lesqx., Annnal Report, 1873, p. 391. 



Frond large, bipinnatifid ; pinn^ opposite, decurriug along the round rachis, long, linear, gradu- 

 ally tapering to the point, equally pinnately lobed ; lobes disjointed to three-fourths of their length, 

 broadly lanceolate, obtusely pointed, scythe-shaped upward ; middle nerve thick, distinct to the point 

 of the lobes; secondary veins parallel to the rachis and the midrib, branching upward; areolation 

 formed by anastomoses of the divisions in one or two rows of large, irregular meshes ; ultimate veinlets 

 parallel, passing up obliquely to the borders. 



From the fine specimen figured, the upper part of a large pinna, the 

 fronds appear to have been long, linear, very gradually diminishing upward; 

 secondary pinnae also comparatively long, twenty-one to twenty-four centi- 

 meters at least, linear, slightly broader in the middle, and gradually narrowed 

 to the point, three and one-half to four centimeters broad; lobes equal, 

 disjoined to three-fourths of their length, entire or slightly crenulate, broadly 

 lanceolate, obtusely pointed, with narrow obtuse sinuses between them, 

 subfalcate, six to seven millimeters broad; upper pinnae more and more 

 obtusely and less deeply lobed, passing to mere equal undulations ; middle 

 nerve thick, ascending to the point of the lobes; areolation discernible only 

 on the lower surface. As seen in fig. 1 a, the lower secondary veins follow 

 parallel to the rachis, branching upward, and forming one or two rows of 

 large rectangular areolae with branchlets, either simple and parallel, or 

 forking near the point and entering the borders. The consistence of this 

 Fern is thick, coriaceous; the upper surface smooth, nearly polished. The 

 fructifications are as yet unknown. 



Habitat. — Golden, Colorado; found in numerous large fragments, and 

 communicated by Rev. A. Lakes. 



IVoodwardia latiloba var. minor, Lesqx. 



PlatelV, Figs. 9, 9 a. 

 Woodwardia latiloba var. minor, Lesqx., Annual Report, 1873, p. 391. 



Pinnaj small ; rachis narrow ; lobes short, obtuse ; secondary veins less divided. 



This small fragment appears to represent a mere variety of the species 



