216 THE FLORA OF THE DAKOTA GROUP. 



branches, those of the cokimii irregular, at riglit angles to the midrib, curved 

 upward; those of the pelta descending to it from the base of tlie midrib, 

 thei'e diversely ramose. 



Habitat: Near Fort Harker, Kansas. No. 2722 of the U. S. National 

 Museum. _ 



Phyllites sp. 

 PI. LIX, Fig. 7. 



A mere fragment, being only the lower lialf of an entire coriaceous 

 leaf, Avhich is lanceolate, narrowed to the base of the midrib, whicli is 

 ■slightly enlarged into a very short petiole, penninerved; median nerve com- 

 paratively strong; secondai'ies very oblique, parallel and equidistant, straiglit 

 or undulate in passing toward the l)orders, camptodrome, anastomosing- in 

 short bows at a distance from the borders, which they follow in double 

 areoles. 



The divergence of the secondaries is only 30°, there being seven pairs 

 of secondaries, which are very distinct upon the fragment of a leaf, which 

 is only 5*"° long and about 3"" broad at the middle. The secondaries are 

 deep and strong, except the lowest, which are comparatively very thin and 

 follow the borders, where they anastomose with branches of that above it. 



The fragment is com})arable to the leaf of Launis HakUiif/cri Ktt., as 

 figured in Fl. v. Bilin, pt. 1, PI. xxx. Fig. 8, at least for its peculiar nervation. 



Habitat : Kansas. 



Phyllites stipul^formis, sp. uov. 

 PI. LXI, Fig. 2. 



Apparently the upper part of two leaflets of a compound or bifid leaf 

 whose real form is consequently unknown. The fragment is of coarse tex- 

 ture, irregularly ovate, truncate or lacerate at base, obtuse; the two aj)ices 

 turned toward each other, the nervation very coarse and irregular, more like 

 that of a double leaf-like stipule, the secondary nerves ])arallel or diverging 

 above with short, thick branches, straight or ol)litpie t() the borders, and 

 deep nervilles variable in distance and direction. 



Habitat: Kansas. 



Phyllites erosus, sp. nov. 

 PL LXI, Fig. 4. 



Leaf of medium size, coriaceous, ovate, lanceolate, obtuse at apex, 

 narrowed nnd cuncMform at the base, entire, irregularly cut at the border ms 

 if gnawed into by aiiinuds, pcitiolntc; iiiiih'il) pcrcurrcnt; srcondancs iiciirK 



