SEGREGATES OF RHUS. 117 



second of the two Tournefortian species, the one quoted by 

 Liunseus himself under H. Toxicodendron, of which species 

 Miller's T. pubescens is meant to be an exact synonym. He was 

 unable to perpetrate a duplicate binary name; and I also leave that 

 task to whomsoever it may be a welcome one. That the species 

 is to be identified with some dwarf plant of the southern sea- 

 board (see Small, Fl. 727) is a proposition for which I can find 

 no warrant. Miller, whose knowledge of these shrubs was far 

 more perfect than that of Linnaeus, says that the present species 

 "grows naturally in many pai'ts of North America ;" also that 

 it is among the larger kinds. Even Linnaeus gave it a range 

 from Virginia to Canada. 



T. Rtdbeeqii. Rhus Rydbergh, Small, in Eydb. PL Mont. 

 268, in part. Well distinguished by Mr. Small, for the plant 

 of Montana, occurring in Wyoming, mountain districts of Colo- 

 rado, southward even to New Mexico, apparently, but hardly 

 including that of Washington and Oregon. 



T. MACEOCARPUM Apparently low, upright, not very stout 

 the small leaves on slender elongated petioles, all parts wholly 

 glabrous : leaflets subequal, small, the terminal one with petio- 

 lule more than i inch long, the laterals almost subsessile, all 

 three of equal size and ovate, either abruptly acute or subtrun- 

 cate at base, acute at apex, entire or with a few coarse teeth, the 

 largest not exceeding 2 inches long, of a light dull green and a 

 firm texture : panicles small and reduced to little more than a 

 simple raceme, not erect, the rachis being slender and the fruits, 

 though few, the largest in the genus almost exactly globose, the 

 epicarp uncommonly thin and fragile, not wrinkled, almost free 

 from the usual striae. 



Known only from extreme Western Kansas well upon the 

 arid region of the Eocky Mountain basal plain; the type speci.. 

 mens in U. S. Herb, from near Syracuse, 11 July, 1893, by C. 

 H. Thompson. 



T. Nbgxjndo. Branches of the season red-brown and hirtel. 

 lous, the older dark-brown, glabrate, closely and minutely len- 

 ticellate : leaves very large, the terminal 5 or 6 inches long, 3 

 to 5 in breadth, ovate, abruptly acuminate, with a few poftrse 



