SEGREGATES OF RHUS. 121 
T. IsoPHYLLUM. Stoutish upright striate stems velvety- 
puberulent not only the first but also the second and third seasons: 
leaves palmately trifoliolate, the leafiets being equal in size and 
all three sessile, 1 to 14 inches long, of somewhat obovate gene- 
ral contour but pinnately sinuate-lobed, the rounded lobes not 
deep, but in about 3 always opposite pairs, dark green above, yet 
dull and with a glaucous hue, paler beneath, with very few and 
scattered appressed hair points on both faces, but between the 
veins, not along them: fruits small, the epicarp not polished 
but dull and muriculate- punctate as well as somewhat pubes- 
cent, the roundish but notably compressed putamen ribbed and 
striated. 
River banks near San Jacinto in southern California, 9 March, 
1898, J. B. Leiberg, u. 3117 as in U. S. Herb Most distinct 
from all others by the sessile terminal leaflet ; the lobing also 
not imitated by any other forms in the 7. diverstlobum aggre- 
gate. 
T. OXYCARPUM. Twigs smooth, free from angles and lenti- 
cels, slightly puberulent: leaves thin, very large, the terminal 
leaflet 3 to 44 inches long, oval, coarsely and evenly crenate- 
lobed, the laterals smaller, inquilateral, entire on the narrower 
side, on the other lobed like the terminal, deep green and glab- 
rous above, beneath paler, with a few hirtellous hairs along the 
veins and on the margin: inflorescence paniculate but the bran- 
ches of it only two or three and very short: fruit on slender 
pedicels and pendulous, notably compressed and of singularly 
oblique-rhomboid outline, tapering turbinately from above the 
middle to the base, the upper part more abruptly acute, epi- 
carp not striate, but irregularly sharply and deeply wrinkled, 
minutely hirtellous-puberulent. 
Vicinity of Santa Cruz, Calif., July, 1884, John Ball; type 
in U.S.Herb. Also from the Salinas Valley, back of Monterey, 
Aug., 1880, G. R. Vasey. I suspect the shrub of having the 
climbing habit. Its habitat is in the redwood forest. 
T. pryopHitum. JDendrophilous, climbing trees to the 
height of 20 feet: branches puberulent, knotted by salient pro- 
tuberances under the insertion of the leaves: foliage large, 6 to 
