DESCKli'TlON or SPECIES. 129 



Hedeba ORBICULATA (Heer) Lesq. 

 PI. XVII, Figs. 12-14. 



Chondrophyllnm orbiculatum Heer, Fl. Foss. Arct., vol. 3, pt. 2, p. 115, PI. xxxi, Fig. 3c. 

 Kecoustructed PI. xxxii, Fig. 13. 



Leaves coriaceous, nearly round or renit'orm, entire or siibeniarg^inate 

 at apex; secondaries numerous, the three lower pairs nearly joined at their 

 base, nuxcli branching, camptodronie; areolatiou in large, quadrangular or 

 polyg(inal meshes formed by the iiTegular subdivision of the nervilles. 



The leaves vary from 2.,5''°' to .5*"" in length, being neai-ly as broad, 

 sometimes even more enlarged horizontally and subemarginate at apex, as 

 in Fig. 12. Heer had only fragments of these leaves for i-econstruction 

 and none of the fragments give a representation of the apex. One of our 

 leaves (Fig. 14^ appears constricted and lol)ed nt apex. This, however, 

 may be a mere casual deformation, though the b^)rders of the sinuses are 

 partly distinct. Thi.s last form is like a transition between this and the fol- 

 lowing species. The petiole is from G""" to 17°"" long and a little enlarged 

 at the point of attachment. This species is closely related to H. pannla 

 Ward and //. minima Ward (Types of the Laramie Flora, p. .57, PI. xxvi. 

 Figs. 4 and 5.) 



Habitat: Ellsworth County, Kansas. Nos. 7.56, 783, and 816 of the 

 museum of the University of Kansas; E. P. West, collector. 



Hedeea ovalis Lesq. 

 PI. XVII, Fig. 15. 



Cret. Fl., p. ill, PI. XXV, Fig. 3; PI. xxvi, Fig. 1. 



Chondrophyllum Xordenskioldi * lieer, Fl. Foss. Arct., vol. 3, pt. 2, p. 114, PI. xxxii. 

 Figs. U, 12; PI. XXX, Fig. 4b. 



Leaves coriaceous, entire, oval, obtuse, narrowed to the petiole, penni- 

 nerved; median nerve stout ; secondaries alternate, irregular in distance, 

 closer towards the base, nuu-li l)ranched, camptodrome; areolatiou in large 

 poK'gonal or quacb'angidar meshes. 



This leaf has the same characters of nervation, al.so the .same form and 

 size, as that tigured in Cret. FL, PI. xxv (loc. cit). As the details of nerva- 

 tion are extremely Avell preserved and distinct, it has been possible to repre- 

 sent it more exactly. It can not l)e positively asserted that the leaf is 

 referable to Heer's ChondrophiiUiim XortlenskiohJi (loc. cit.), which is merely 

 represented in fragments. The leaf reconstructed by Heer (loc. cit., PI, 



JION XVII 9 



