218 THE FLORA OF THE DAKOTA GROUP, 



of the midrib. It appears of thin texture, the mith'il) being narrow ; the 

 secondaries mnuerous, j)arallel, at an acute angle of divergence of nearly 

 50°, and a little curved in passing toward the borders, incumljeut and camp- 

 todrome. 



The form of the leaf, at least in its lower part, is very similar tci that 

 of the fragment of Aristolochia in/^qmlis Heer (Fl. Foss. Arct., vol. 7, PI. 

 xcii, Fig. 2), from the Miocene of Bear Island. But the whole leaf does 

 not sliow the character of the leaves of Aristolochia, as all the secondaries 

 appear oblique from the midi-ib, none of the lower being turned downward 

 into the lobes ,or auricles. Except for this difference the nervation and 

 areolation con-espond to that of the leaf figured by Heer (loc. cit.), being 

 also similar to it by the unequally lobed base. 



Habitat: Ellsworth County, Kansas. No. 1246 of the collection of 

 Prof F. H. Snow ; E. P. West, collector. 



Phyllites dueescens, sp. uov. 

 PI. LXI, Fig. 5; PI. LXII, Fig. 3. 



Leaves coriaceous, flat or incurved along the borders, broadly oval, 

 entire, undulate, rounded at apex, narrowed to a long petiole, penninerved; 

 midrib straight and stout, percurreut; secondaries equidistant, parallel, 

 oblique, with few branches, craspedodrome. 



These leaves are of large size, being narrowed and prolonged down- 

 ward, their borders nearly entire, their long petiole straight down as con- 

 tinuation of the rai(h-ib and with distant parallel secondaries. They are 

 <-omi)arable to some species of Terminalia, like T. radohojana Ung., of the 

 Miocene of Evirope, T. rectincrva Velen.,^ which, like that of the Miocene, 

 has the leaves narit)w, but the secondaries are straight in passing toward the 

 borders and craspedoch-ome. The relation which is marked in the general 

 appearance is not really close. 



The leaves are very variable in size, ranging from G.F)"'" in length or 

 more, from 3.-5'''" to 6. .5"™ broad in the middle, the larger leaves having the 

 petiole like a continuation of the midrili 3"" long, inflated at the point of 

 attachment. They have six pairs of strong, alternate, oblique secondaries 

 diverging 40° to 45° from the midrib, according to the width of the leaves, 

 and ])assing straight to the borders with feAV branches. 



Habitat : Probably all Ellsworth County, Kansas. Fig. 3, PI. LXXIV, 

 is No. 2749 of the U. S. National Museum. 



' Fl. Bohm. Kreide., pt. 3, PI. v, Figs. 1, 2. 



