SEGREGATES OF RHUS. 125 
labelled 2. diversé/oba, though the plant, despite its inclining ` 
panicles is strictly of the Atlantic type of the genus. 
T. PUNCTATUM. Stems stoutish, rigidly erect, of light red- 
dish brown, glabrous, dotted very conspicuously with small 
elliptic lenticels: leaflets of a vivid green on both faces, of firm 
texture, all three alike in form and nearly so in size, broadly 
ovate, abruptly acuminate, sparingly and coarsely serrate-tooth- 
ed in the middle, glabrous above, beneath hirtellous by tufts in 
and near the axils of midveins and veins, otherwise scantily 
short-hairy: panicles short and dense, erect: fruit rather large, 
strongly depressed-globose, umbilicate at summit, many-sulcate, 
glabrous and shining. 
Type O. B. Metcalfe’s n. 1088, from the Black Range of 
mountains in southern New Mexico, 1904; distributed as Rhus 
Rydbergit, from which it is very clearly distinct. 
T. ABORIGINUM. Mode of growth not known: leafy branches 
slender, striate-angled, minutely lenticellate, glabrous: leaves 
large, 7 to 9 inches long; terminal leaflet ovate, 3 to 5 inches 
long, obtusish at base, abruptly apiculate, the laterals similar, 
smaller, strongly unequilateral, all entire, thin, nearly glabrous 
above, villous-hirtellous beneath along the primary veins: pani- 
cles small, dense, sessile: fruit small, nearly spherical, a trifle 
longer than broad, neither striate nor sulcate, sparsely muricu- 
late, deeply irregular and sharply wrinkled. 
Collected at the Choctaw Agency on Lieut. Whipple’s expedi- 
tion, by Dr. J. M. Bigelow in 1853, typein U. S. Herb. No Rhus 
of this group is catalogued in Whipple’s Report. 
T. RHOMBOIDEUM. Rhus rhomboidea, Small, F1. 727. 
T. GonrocarPum. Tall climber, rooting freely: branches 
slender, sharply angled, obscurely puberulent: leaves large. on 
slender elongated petioles, the leaflets thin, approximate, the 
terminal ovate, 3 or 4 inches long, tapering abruptly at base, at 
apex is abruptly short-pointed, entire or with several shallow 
crenate lobes in the middle, above puberulent along the veins, 
sparsely hispidulous between them, beneath only hispidulous 
and chiefly so along the veins: panicles and fruits both small, 
the pedicels of the latter divaricate: fruit round-ovoid, very 
