Lthus. TEREBINTHINE. 31 
Rhus myricefolia, sp. nov. 
Pl. [. Figs. 5-8. 
Leaves large pinnate; leaflets oblong, lanceolate-pointed or acuminate, short-petioled ; 
borders undulate and denticulate ; nervation mixed. 
The consistence of the leaflets is hard, apparently coriaceous, the sur- 
face undulate and smooth; their size is comparatively large, from eight 
to thirteen and a half centimeters long, and one and a half to two and 
a half centimeters broad. The form, cuneate to the base, is ovate lanceo- 
late acute or oblong-lanceolate, gradually passing up to a_ prolonged 
acumen. As seen in the comparison of Figs. 5 and 6, the borders 
are more or less distinctly dentate, according to the size of the leaves; 
the dentations, however, being irregular in all; they are also undulate 
like the surface. The secondary nerves, as marked in Figs. 6 and 7, 
are at a right angle of divergence near the base, gradually becoming 
more oblique upwards, all curved in passing to the borders, where they 
either enter the teeth or curve in passing under them, as in the former 
species. By their shape, their consistence and nervation, these leaves are 
similar to those of Myrica, to which they should have been referred but 
for the fragment (Fig. 5) which shows distinctly part of a compound leaf. 
We do not have in our flora any species of Rhus of the same characters 
as those of this species. It, however, belongs to the section of the Rhus 
with smooth or naked petioled pinnate leaves and serrate leaflets, like 
R. viridiflora, Poir., R. glabra, Linn., especially represented at our time in 
the North American flora. Fig. 8 is apparently a small crushed cone, 
or a seed surrounded by an involucre. Its reference is not ascertained. 
Habitat. — Chalk Bluffs, Nevada County, California. Voy’s Collection. 
Rhus metopioides, sp. nov. 
Pi. VI. Figs. 12, 13. 
Leaves pinnate ; leaflets coriaceous, very entire, unequilateral, broadly ovate, abruptly 
pointed, rounded to a short petiole; secondary nerves in right angle to the midrib, 
subcamptodrome, separated by tertiary thinner veins anastomosing by veinlets at 
various angles to the secondary ones. 
This form bears to the present Rhus metopium, Linn., of Cuba (found 
also in cultivation at Key West and South Florida), the same degree of 
