214 THE FLORA OP THE DAKOTA GROUP. 



Phyllites Snowii, sp. nov, 

 PI. XXXVIir, Fig. 2. 



Leaf large, of thin textui-e, ovate, obtuse, truncate and inequilateral 

 at base, minutely dentate; primary nerve narrow, secondaries tliin, open, 

 nearly straight and parallel, the lower branching'. 



The leaf, Avhich is 10"'" long and 9""" l)road in tlie middle, has the 

 aspect of a leaf of Platanus, and also resembles, in some characters, leaves of 

 Pi-otophyllum. It differs from both by its abnormal form, being inequilat- 

 eral or more prolonged at base on one side than on the other. Its nerva- 

 tion is pinnate, the secondaries being all alternate, eight pairs, at an angle 

 of ()0°, tlie lowest branching and anastomosing in bows along the truncate 

 base witliout connection to a l>asilar ^'einlet; tlie others craspedodrome as 

 well as their divisions; nervilles distinct and distant, simple and flexuous. 



I do not know of any distinct relationship of this leaf to any fossil 

 species. It is comparable to Alnltes grandifoJius Newb. (lUustr. Cret. and 

 Tert. PL, PI. IV, Fig. 2), a fragment without description, in which the rela- 

 tion to Alnus is very obscure. On account of the leaf being inequilateral 

 it might rather be compared to some species of Uliwus, as U. rrassincrrid 

 Ett. (Flora V. Bilin, p. G3 (139), PI. xviii, Figs. 28 and 2'.)), or U. diptera 

 Steenstr., as represented by Heer in Fl. Foss. Arct., vol. 1, j). 149, PI. xxvii, 

 Fig. 3. 



Habitat: Ellsworth County, Kansas. No. 765 of the nniseum ot the 

 Univer.sity of Kansas ; E. P. West, collector. 



Phyllites Vanon^ Heer. 

 PI. XX, Fig. 9; PI. XLII, Fig. 5. 



Phyll. Crtit. rtu Nebr., p. 22, PI. i, Pig. 8; Lesquereux, Cret. PI., p. 113, PI. xx, Fig. 7; 



PI. XXVIII, Fig. 8. 



Leaves of this species of medium size, entire, ovate, blunt at apex, 

 generally without any trace of nervation as described (loc. cit.), are not 

 rare iu the Dakota Group. Those I have figured here have the secondaries 

 distinct though very tliin. The secondaries are opposite, proximate, sexen- 

 teen to eighteen pairs on one of the leaves, the largest more distant on the 

 other, where they are partly effaced. This nervation and also the form of 

 the leaves seem to refer them to Ficus or to some Leguminosites. They 

 are comparalile for their form to Ficus pulchcrriiiid Sap.,' wliith has the sec- 



' Etudes, pt. 1, PL VII, Fig. 2. 



