240 UNITED STATES GEOLOGICAL SURVEY— TERTIARY FLORA. 



this leaf, its nervation and punctate surface, are very much like those of N. 

 mult'tflora, Wang., the common Tupelo of the present North American llora. 



The fruits, which I refer hypothetically to the same species for the 

 reason that l)oth kinds of organs were found at the same place, and that I 

 did not find until now any other representative of the genus in the specimens 

 procured from the Western Tertiary, are fifteen millimeters long, eight milli- 

 meters broad below the middle, marked by regular small costae, with th(! 

 intervening space flat, and narrowly lined (as seen in fig. 6, enlarged). For 

 its size, the fruit is comparable to some of the fossil ones described by Euro- 

 pean authors, especially to N. maxima, Web.; N. arcfica, Heer; N. ornitho- 

 broma, Ung., etc. The position of these two fruits upon the same specimens 

 seems to indicate them as originally in a cluster. 



Habitat. — Golden, Colorado; rare. Six miles above Spring Caiion, 

 Montana, in small fragments of leaves. 



CORNICULACE^. 

 SAXIFRAGES. 



CALLICOMA, Andrews. 

 This genus is exclusively represented in New Holland. This, and the 

 details given below, in the description of these leaves, render the reference 

 of the species to this genus extremely doubtful. 



Callicoina micropliylla!. Ett. 



Plate XLIII, Figs. 2-4. 



Callicoma microphi/lla, Ett., Bil. FI., iii, p. ^, pi. xl, figs. 14-22. 

 Shust drymeja, Leeqx., Annual Report, 1873, p. 416. 



Leaves subcoriaceons, narrowly lanceolate-acuminate, cuneate and inequilateral at the base, 

 sbort-petioled, with borders sharply and equally dentate, penninerved; secondary veins numerous, 

 straight from the midrib to the point of the teeth. 



It is remarked already, in the first description of this species, that its 

 reference to lihus is very doubtful. Since then I have searched carefully for 

 species which might represent the characters of these leaflets, and find them 

 related only with some evidence to this Callicoma, originally published from 

 Bilin. Their form, which shows them to be separate leaflets of a com- 

 p(jund leaf, prevents their reference to Myrica, though they have a marked 

 affinity to Myrica angustafa and M. Scq)ortu7ia, Schp., two species figured and 

 described by Saporta (Kt., iii, p. 12.5, pi. v, figs. 4-7). The nervation is dif- 

 ferent from that of any species of Rhus; while, except perhaps by the teeth 

 slightly more acute, there is not any difl'erence whatever between these leaflets 



