128 TOE FLORA OF THE DAKOTA GROUP. 



pairs, opposite and equidistant, craspedodronie, branches of the hiteral 

 primaries camptodrome. 



The leaves on which the species is based have nearly the same char- 

 acters as the large leaf (Fig. 1,) appearing really as a diminutive form of the 

 same species. As seen by the figures, the difference in size is very great; 

 but it is quite as marked between Figs. 3 and 2 as between this and Fig. 1. 

 Essential differences are seen in the thickness of the lateral primary nerves 

 and in the texture of the leaves, which is nmch thicker in Fig. 1 than in 

 Figs 2 and 3, and in the emarginate apex of these two last-mentioned leaves. 

 In spite of these differences the value of this last species may remain 

 doubtful, for Figs. 2 and 3 closely imitate the nervation of Fig. 1, as both 

 of these leaves have a thin lateral nerve on one side, while that of Fig. 1 

 has two, a difference caused by the reduced size of the leaves. 



Habitat: Ten miles northeast of Delphos, Kansas. Nos. 4026 (Fig. 2) 

 and 4053a (Fig. 3) of the collection of Mr. R. D. Lacoe. 



Hedera platanoidea Lesq. 



Cret. andTert. Fl., p. 65, PI. iii, Figs. 5, «; Uayden's Auu. Rept., 1874, p. 351, PI. in, 



Fig. 3. 



Leaves coriaceous, subreniform, broader than long, rounded or obti\sely 

 lobate at apex; abruptly narrowed or obliquely subtruncate at base; three 

 nerved from a short distance above the base; lateral primaiies curving, 

 nearly parallel to the borders, anastomosing by thick branches and ner^alles 

 with marginal veinlets underneath; secondaries tew, flexuous, irregularly 

 branched, curving along the borders and anastomosing above, entering the 

 teeth directly or by short veinlets, or slightly marked deuticulatious of the 

 borders. 



The reference of the fragments figured here to the species described in 

 Cret. and Tert. Fl. (loe. cit.) is authorized by the identity of the nervation 

 which, though extremely mixed and variable, is easily recognized. 



Habitat: Ten miles northeast of Delphos, Kan.sas. Nos. 4174 (Fig. 4) 

 and 4021 (Fig. 5) of the collection of Mr. R. D. Lacoe. 



