148 AMERICAN MIDLAND NATURALIST 



loso-pubescentes; fructiculi permulti, 3 mm. diametro, subovato- 

 subglobosi. 



A shrub with stout, striate, brown, shining, lenticillate 

 branches; foHage large and ample, petiole and rachis together 

 3 dm. long; leaflets 11-17, about i inch apart, strongly petiolulate, 

 acuminate, 9-11 cm. long, 3-3.5 cm. wide, oblong-lanceolate, 

 strongly serrate, with about 15 somewhat uneven serratures on 

 each margin, subcoriaceous, subfalcate, upper face a rich, deep 

 green, lower scarcely glaucescent at all, especially on fruiting 

 specimens; panicle in flower broadly pyramidal, 2 dm. high, 

 widest at base, in fruit of the same height, but not exactly as 

 wide; panicle branches tomentulose-pubescent; druplets many, 

 3 mm. in diameter, subglobose with an inclination to ovate. 



Its ally, Rhus cisniontana Greene, known from western 

 Nebraska and Kansas, is much smaller in all its parts, has 11-13 

 leaflets, which are 4-6 cm. long, subsessile and glaucescent beneath, 

 and its fruiting panicle is about 9 cm. high. 



The plant just described seems to be a native of southeastern 

 Nebraska, as it was collected near Minden, a locality situated 

 somewhat east of the central perpendicular line in the southern 

 part of that state. As types have been used specimens collected 

 in flower on July 8, 19 12, and in fruit on Sept. 12, 19 12, by Dr. H. 

 Hapeman, and the species name has been conceived with a view 

 of doing honor to him as the discoverer of this remarkably large 

 and magnificent sumach. 



The task of differentiating this species from its allies has been 

 facilitated in great part through the valued helpfulness of Dr. 

 Edward L. Greene, who accentuated the essential points in the 

 determination and added to my gratitude by kindly sending me 

 leaflets of R. cismontana both fron Kansas and Nebraska. 



Leeds, North Dakota. 



Notes on Box-Elders. — I. 



BY B. F. BUSH. 



Having read Dr. Rydberg's treatment of A\'(iiindo^ in Rocky 

 Mountain Flora, I wrote at once to Dr. Nieuwland who obligingly 

 I Bull. In. Bot. Club. XL. : 2, p. 54-56. Feb. (1913) 



