358 Rhus glabra ab Edward L. Greene revisa 
on both faces showing a few pilose hairs: leaflets 13—17, subsessile, 
broad and approximate, oblong-lanceolate, 8—11 cm long, subulate- 
‘acuminate, coarsely and closely subcrenate-serrate, the serratures about 
14 on a side, texture of leaflet uncommonly thin, upper face of a light 
but rather lurid green, the lower glaucous almost to whiteness; panicle 
not large, 11 cm long in fruit, narrow-pyramidal, distinctly pedunculate, 
the peduncle and branches of panicle hirsute, the hairiness more or less 
distinctly retrorse; drupelets larger than the average and of a lighter 
color, being bright crimson. 
Central Michigan near Alma, on dry ridges, collected August 12, 
1895, by Charles A. Davis, the type specimen in the Herbarium of 
the Field Museum, Chicago. A fine species, perhaps common enough in 
central Michigan, and probably beyond the boundaries of the State south- 
ward, a region in which little or no effective collecting has been done 
in late years. But there is a poor flowering specimen, or fragment, in 
the National Herbarium which, by the one leaf it bears, I can refer here. 
This appears to have been sent by Mr. Beale, in 1899; but there is 
nothing to indicate who collected it, or where. Although pubescent, this 
bears no relation to R. hirta 
15. Rhus media E. L. Greene, |. c., p. 188. 
Branches rather sharply angular in maturity and sparsely dotted 
with small lenticels; leaves large but not elongated, only 2 dm long, 
rachis not stout, whitish with bloom, glabrous except as to a tomentulose 
line; leaflets about 13, large, sessile, oblong or subfalcate-oblong, broadly 
and abruptly pointed rather than acuminate, appressed-serrate, the 
serratures 13—15 on a side, the whole leaflet of firm texture and about 
8 em long, 2—2,5 em wide, of a dull lightish green above, quite glaucous 
beneath; fruiting panicle rather lax, slender-peduncled and as if some- 
what drooping but of pyramidal outline, its branches rather finely pubes- 
cent; drupelets of middle size, notably oblique, acutish. 
In habits the region of scattered woodlands and small prairies in 
southern Michigan and northern Indiana and Illinois, if I rightly 
refer to it rather numerous specimens, collected in various places, all in 
young leaf and flower only. Such are in the herbaria from Warrenville, 
Ill, by L. M. Umbach, July 2, 1895, and by Charles C. Deam at Bluff- 
ton, Indiana, 1897; but the type sheet, no. 124146 of the Field Museum, 
a perfect fruiting specimen, is from Jackson County, Michigan, by S. H. 
and D. R. Camp, September 19, 1898. Sheet 6072 of the same her- 
barium, from Stark County, Illinois, may or may not be the same. Its 
detached fruiting panicle may well belong here, but the one leaf shown 
is attached to a flowering branch, and therefore immature. | 
16. Rhus cismontana E. L. Greene, l. c., p. 189. 
Shrub doubtless low, all its parts reduced in size and rather slender 
as to branches and leaf-rachis, all these pale and glaucous; leaves 1,5 
to 2 dm long, ascending; leaflets 11—13, not crowded, of a pallid green 
