SBGBBGATBS Oi BHtTS. 1S5 



labelled Ji. diversiloba, though the plant, despite its inclining 

 panicles is strictly of the Atlantic type of the genus. 



T. PUKCTATUM. Stems stoutish, rigidly erect, of light red- 

 dish brownj 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 0. B. Metcalfe's n. 1088, from the Black Range of 

 mountains in southern New Mexico, 1904 ; distributed as Rhus 

 Rydbergii, ,from which it is very clearly distinct. 



T. ABOiiiGiiiUM. 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, type in U. S. Herb. No Rhus 

 of this group is catalogued in Whipple's Report. 



T. RHOMBOIDEUM. Rhus rhomboidea, Small, Fl. 727. 



T. GONIOCABPUM. 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 iti 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 



