SEGREGATES OF RHUS. 135 
S. SABULOSA. Upright, slender, the mature branches glabrate, 
while growing obscurely puberulent: foliage small, subcoriace- 
ous, glabrous; terminal leaflet ? inch long, obovate-cuneiform, 
tapering and entire from far above the middle, at summit broadly 
and obtusely 3-lobed, the middle lobe.slightly exceeding the 
others ; lateral leaflets smaller, less cuneate, the 3 lobes more 
shallow: fruits not small, puncticulate and somewhat bristly. 
Pebbly banks or beds of the Rio San Pedro, western Texas, 
Charles Wright, 1851, n. 917 as in U. S. Herb. 
S. HEDERACEA. Evidently dwarf, with many short rigid 
divergent branches, these at first obscurely puberulent, later 
glabrous: leaves small, of a deep almost ivy-green above and 
with light-colored veins, glabrous on both faces, or with 
some short hairs along the veins beneath; terminal leaflet ł to 
1 inch long, below the middle quite as broad, broadly rhomboid, 
with about 3 shallow crenate lobes on each margin, all very 
obtuse but mucronulate; laterals not half as large, obovate: 
spikes small, subsessile, bracts transverse-rugulose, sparsely 
pubescent: immature fruits hirtellous and viscid-granular. 
Mica Spring, Nevada, M. E. Jones, in U. S. Herb. 
S. AFFINIS. Habit of the last, with similarly deep green 
whitish-veiny foliage, but all the leaves simple, often cleft 
deeply into 3 lobes, each lobe simply or doubtly crenate, as often 
not lobed at all, then broadly ovate above a broad truncate base, 
the largest 1 inch long: fruits large, viscid-granular, otherwise 
nearly glabrous. 
Shrub of southern Utah deserts, collected at Kanab, Spring- 
dale and Silver Reef in 1894 by M. E. Jones, and distributed as 
“ Rhus Canadensis simplicifolia, Greene,” but erroneously, the 
shrub, despite its simple foliage, being more nearly akin to 
S, hederacea. 
S. SIMPLICIFOLIA. Rhus Canadensis simplicifolia, Greene, 
Bull. Torr. Club, xvi 13. The leaves in this are not of the dark 
ivy-green of the last; they are of round-ovate outline, a little 
tapering to the petiole, broadest not at base but toward the 
middle, and simply as well as evenly crenate all around except 
across the base, 
