124 LEAFLETS. 
of ovate circumscription above an abruptly tapering base, usu- 
ally deeply and incisely 3-lobed, the lobes sinuate-lobed, the 
pair of leaflets little smaller, inequilateral, mostly 2-lobed on 
the broader side only, rarely 3-lobed, all of a rich deep green 
above and sparsely strigulose, beneath pale and with an obscure 
scattered less strigose superficial pubescence, but all the veins 
distinctly hirtellous : inflorescence a well developed panicle in 
each axil, much shorter than the leaves and standing out from 
them almost divaricately : fruit unknown. 
Climbing or trailing our trees shrubs and volcanic rocks at 
Nombre de Dios, 40 miles south of Durango, Mexico, as collect- 
ed by Dr. Edw. Palmer, April, 1896 ; distr. n. 106. 
T. BITERNATUM. Allied to the last, more slender, the branch- 
es puberulent and striate; leaves as large, somewhat biternate, 
the terminal leaflets 3-parted and the divisions all deeply and 
sinuately 3 to 5-lobed, even the pair nearly as much subdivided, 
both faces minutely strigulose, the veins beneath minutely hir- 
tellous : panicles very small, few-fruited the fruits small, de- 
pressed-globose, only faintly striate. 
Eagle’s Nest on the Rio Grande, western Texas, V. Havard, 
in U. S. Herb., sheet 156,164; no date given. Very beautiful 
almost twice-ternate and compound-looking foliage. 
T. VERRUCOSUM. Rhus verrucosum, Scheele, Linnea, xxi. 592. 
A lobed-leaved species of western Texas, evidently good not- 
withstanding that the warts on the leaves of some specimens, 
which suggested the name, are accidental. 
T. PUMILUM. Dwarf, erect, simple or rarely with a short 
branch or two, only 6 or 8 inches high, striate-angled, cinereous 
and glabrous at maturity : leaflets ovate, coarsely toothed, acute 
or abruptly acuminate, pubescent on both faces but only on the 
primary veins and toward the margin: panicles numerous, small 
and quite simple, not rarely reduced to a mere raceme, in fruit 
not erect but decidedly nodding: fruits large for the plant, 
exactly spherical, the epicarp greenish-white, scarcely polished, 
not obviously either striate or wrinkled. 
In higher mountains of northern Arizona not far from Flag- 
staff, June, 1898, D. T. MacDougal, n. 28 as in U. S. Herb., 
