DESCRIPTION OF SPECIES— RHAMNBJi:. 281 



scarcely divided; and the nervillcs also and llic arcolatioii are of a different 

 character. The few branches seen toward the upper part of some of the 

 nerves are rather inflated nerviiles than true branches, like those of the living 

 11. lanceolaias, Pursli., ii. Wujfcnii, Sprcng, etc. I have remarked, in the 

 Report {loc. cit.), that, when the fructification of this and the following 

 species are known, they will probably constitute a separate group. 



Habitat. — Golden, Colorado; common. Very rare at Black Buttes, 

 Wyoming. Prof. F. B. Meek found two fine leaves of this species in burned 

 red shale at a short distance west of Black Buttes, Wyoming. 

 Klianinus Ooldianus, Lesqz. 

 Plato LIU, Figs. 4-8. 

 Jihamnua Goldiavvs, Lesqx., Annual Report, 1872, p. .381 ; 1673, p. 405. — Scbp., Pal. V<^g€t., iii, p. 61S«. 



Leaves of small size, of the same consistence as those of the former species, oval or ovate, obtusely 

 pointed or acuminate, subcordate or rounded to a short petiole. 



These leaves are still more abundant at Golden than those of the former 

 species, from which they merely differ by the generally smaller size, the base 

 rounded or subcordate to a shorter petiole, the lateral veins generally more 

 numerous, and the lo'^^er ones more or less branching. Fig. 7, the smallest 

 of these leaves, resembles Berchemia multinervis, Hcer, differing merely l)y • 

 the branching of the lower lateral nerves, a character remarked in all the 

 leaves of the species, though varial)le their size and shape may be. 



Habitat. — Golden, Colorado. Eare at Black Buttes, Wyoming. One 

 specimen, representing the large form, is from Carbon, Wyoming. 



R li a ni n 11 s o b o v a t ii s , Lesq:s. 

 Plate LIV, Figs. 1, 2. 

 lihamvus obovatus, Lesfis., Annual Report, J6C0, j). 197 : 1872, pp. 375, 381, 402. 



Leaves subcoriaceous, very entire, oblanceolatc or obovatc, gradually rounded to an obtuse point . 

 lateral nerves very close, straight to the borders, camptodromo. 



These leaves vary in size from seven to nine centimeters long, without 

 the petiole, and from one and a half to three and a half centimeters broad 

 toward the point, where they are widest, gradually narrowing downward to 

 a short petiole. The middle nerve is thick, the secondary veins very close 

 and numerous, two millimeters distant, eighteen to twenty-two pairs in eacli 

 leaf, thin, parallel, straight, with their bows just on the borders, and scarcely 

 discernible. By this nervation, they are rather referable to Berchemia, having 

 their lateral nerves still more numerous than B. inultinervis. 



