LKSQUERELx.l ENUMERATION OF CRETACEOUS PLANTS. 351 



two species with eutire leaves, A. Toivneri and A. concreta, were found 

 near Clay Center, except A. tripartita., which also is from Fort Barker. 

 These Hve new types of Cretaceous i»lants proves the richness of this 

 remarkable flora, aud their local distribution assures for future explora- 

 tions a rich Held for new discoveries. 

 Habitat. — South of Fort Harker, Clis. Sternberg. 



Hedkra ovalis, Lesqx,, Cret. Flora, p, 91. PI. XXV, fig. 3, and PI. 



XXVI, fig. 4. 



Leaves coriaceons, entire, oval, rounded at the point, narrowed to 

 the hose, pinnateJy nerved ; middle nerve tJiiclc; secondary veins alternate^ 

 irregular in distance, more or less numerous ; areolation in large irregular 

 meshes. 



These leaves have an evident relation to those published by Professor 

 Heer under the name of Chondrophyllum NordensMoldi and C.orbicu latum, 

 from the upper Cretaceous of Greenland Foss. in his Flor., Arct., HI, pp. 

 114 and 115, PI. XXXII, figs. 12 and 13, reconstructed from fragments. 

 When the specimens are compared, they may prove to be the same spe- 

 cies, for, though I have formerly consideretl the leaves as representing 

 one species only, for the fragments show a great diversity in the charac- 

 ters of the nervation, there is, however, too great a difference between 

 the multiple much-divided secondary veins on a broader angle of diverg- 

 ence of PL XXV, fig. 3, and the more simple nervation of PI. XXVI, 

 fig. 4, to permit considering them as representing the same species. 



Hedera Schoiperi sp. nov. PI. VII, fig. 5. 



Leaf sidjreni form, broader than long, rounded at the top, ahruptly nar- 

 roived or nearly truncate to a short petiole, three-nerved from above the 

 base ; lateral veins curving in various directions toward the borders, 

 anastomosing by thiclc branches and nervilles with the divisions of the short, 

 distant secondary veins, curving along the borders and entering by short 

 veinlets the distant, slightly marked denticulations of the borders. 



A fine leaf of coriaceous substance, six centimeters long without the 

 petiole (which is onlj^ seven millimeters long aud enlarged at its base), 

 six and one-half centimeters broad, with borders minutely denticu- 

 late, the teeth at different distances and of various size, aud a trifld 

 nervation from a short distance above the border base of the leaf; the 

 lateral veins curve, the one inside toward the middle nerve, the other 

 outside toward the border and branching nearly at right angle, they anas- 

 tomose with nervilles or divisions of the secondary veins aud form an 

 areolation irregular and mixed with angular, square, or polygonal 

 meshes. This areolation partakes of the characters of that of the former 

 species. It is somewhat analogous to that of Greviopsis tremuhrfolia, 

 and of Cissiis ampelopsidea Sap., and recognizable also in the following. 



Habitat. — South of Fort Marker, Chs.' Sternberg. 



Hedera platanoidea, sp. nov. PI. Ill, fig. 3. 



Leaf small, broadly ovate, truncate at the base, round at the top, short 

 petioled, entire ; nervation irijid from a short distance above the base; pri- 

 mary veins craspedodrome. 



This leaf five centimeters broad, four and one-half centimeters long 

 without the short enlarged petiole, has its borders entire, though 

 the i)rimary and seco)idary veins reach to the borders and enter them ; 

 the two lateral primary nerves force the border slightly outside, aud the 

 leaf ai)pears thus sublobate or enlarged in the middle; the lower branches 



