280 U>'1TED STATES GEOLOGICAL SURVEY— TERTIARY FLORA. 



The iiinn and size, arc the saiiio as those of \hv Iraf rolbrrcd lo Dlospyros 

 brachyscpala {\)\. xl, fig. 7); I>iit the nervation is ot" a (lifferent type. But for 

 the branching of one of its nerves, it wonhl be referable toi?. Dec/<e)iii, llcer. 

 Habitat. — Golden, South Table Mountain, Colorado. 



R li a ni II II s ! discolor, Lesqx. 



riate LII, Fig. 17. 

 llhamiiiis discolor, LesfjS., Annual Eoport, 167'2, p. S'JS. 



Leaf oval, broadly ciiueate to tbe petiole, very enliio, lueinbianacoons; nerv ition canii>fo<lrome; 

 secondary uervea clote, parallel, couiucttd l)y ijiniierous, dibliiict, ublicpie uervilles. 



As for the former leaf, the generic relation of this one might be con- 

 tradicted. The leaf is much like that described and figured as Qucrcns 

 straminen (pi. xix, fig. 7). But if the sliape is the same, the nervation is liir 

 different. All the veins are black; covered with a thin coating of coaly 

 matter,as if they had been originally villous. They are all simple, or without 

 any trace of branch, reaching straight lo the borders on a more acute angle 

 of divergence, and without any trace of tertiary intermixed nerves, which 

 separate nearly all the secondary ones in the leaf of pi. "xix. The texture 

 also seems to be more thick and compact. This Rhamnus is related to U. 

 hrevifolius, Al. Br. (iu Heer, Fl. Tert. Ilelv., p. 78, pi. cxxiii, figs. 27, 30), dif- 

 fering by the shape and the larger size of the leaves, which, by their Ibrm, 

 relate the species to R. Pumhianus, D C, a species now living in Oregon. 



Habitat. — Black Buttes, Wyoming; very rare. 



K h a III n si s 4' I c b ii d- ii ■ , Lesqx. 

 rUateUlI, Figs. 1-3. 

 Bhammts Chburni, Lesqx., Aunual Repoit, 1872, pp. 381, 400. — Sebp , Piil. Vegc^t., iii, p. 611. 



Leaves somewhat tbick, but not coriaceous, very entire, elliptical or lanceolate, tapcr-poiutcd, 

 narrowed to a comparatively long, slender petiole; secondary Aeins close, parallel, scarcely curved io 

 traversing tUo lamina, forming a series of timple bows vciy near Ibo borders, joined by very close 

 nervilles. 



These leaves, like those of the following species, belong to the section 

 mentioned above, whose relation is considered by European authors as more 

 marked with Evpliorhiacece or Morcce. The leaves are of large size, more or 

 less acutely pointed, with the base cuneate, and with numerous alternate 

 lateral nerves diverging about 40° from the narrow midril). Fig. 3 resembles 

 fig. 5 of pi. xlii, described as a Cornus. Its lateral nerves are, however, closer, 

 about twice as numerous, not cui ve<l or slightly so in passing up to tiie Ijorders, 



