DESCRIPTION OF SPECIES— MOREiE. 201 



ten centimeters broad toward the base, wliere Ihey are eidarged, rounded, 

 and subcordate, contracted upward to a short, ol)tuse acumen. Tlie lateral 

 veins, all thick, on the same angle of divergence, are nearly equidistant, the 

 basilar pair, mucii branched on the lower side, being not more distant from 

 the first pair of secondary veins than these are l)etween themselves. The; 

 areolation is irregularly quadrate or polygonal, formed by subdivisions in 

 right angle from deep nervilles, joined in the middle, rarely simple. From 

 the compari.son of the characters of these leaves with those oi" the following 

 species, I have been induced to refer them to the same genus. Dotnbeyopsis 

 as a genus is still uncertainly limited. A number of tlie species descril)e(l 

 under this name arc now distributed in other genera, Grewiopsis, Grewia, and 

 Fkus, especially, as seen from the synonymy of F. tilictfolia, a form to which 

 our species is also related. 



Habitat. — Golden, Colorado; not frequent. 



Ficus pliiiiicostata, Lesqz. 



Plato XXXI, Figs. 1-8, 10, U, 12. 



Fiats planicoKlala, Lfs(ix., Annual Report, 1872, p. 393.— Schp., Pjil. V6g6t., iii, p. 694. 



Leaves iif medium size, snbcoriaoeous, entire, elliptical or broadly oval, slightly acuminate or obtuse, 

 roiiuded to a short, thick petiole, palmately three-nerved from the top of the petiole, rarely from a short 

 distance above the base; primary and secondary nerves broad, flat, all camptodronie, as well as their 

 divisions. 



The essential character of these leaves, extremely abundant at Black 

 Buttes, found also at Golden and other localities, is the broad, flattened face of 

 the nerves. Their surface is not as coarse, their consistence not as thick as 

 in the former species, and all the leaves have the same graceful oval shape. 

 The basilar nerves are generally at a greater distance from the secondary 

 ones; the characters of the nervation and the areolation, however, being the 

 same. All the nerves are more or less branching, the ])rimary ones frf)ni the 

 base to the point, the secondary ones only towani the borders, where all the 

 divisions abruptly curve quite near the margin, sometimes passing into the 

 edges. The leaves are of medium size. The largest which T have seen is 

 twelve centimeters long and seven centimeters broad in the middle. As seen 

 in figs. 2, 4, and 10, the top is sometimes abruptly contracted into a short 

 acumen; they are, however, more generally obtuse. The s|)ecies seems very 

 variable. I am, however, uncertain if the forms described here as varieties 

 do not represent sejiarate species. Fig. 6 is a branch with unfolding leaves. 



Habitat. — Black Buttes, Wyoming, there very abundant; Golden, Col- 



