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IOWA ACADEMY OF SCIENCES. 
yellowish next the wood; leaves similar to Quercus palus- 
tris DuRoi; acorn solitary or in pairs, ellipsoidal, varying 
to somewhat cylindrical or globose, one-third to one-half 
immersed; cup turbinate or cup-shaped, thinnish, usually 
tapering into a peduncle; scales narrowly ovate, obtuse or 
truncate, brownish, pubescent, closely appressed. 
This species is represented in Iowa by one tree growing 
near Big Rock, Scott county. Further search will proba- 
bly find the species of frequent occurrence. 
Hill, E. J., Bot. Gaz., Yol. 28, p. 215; Barnes, Reppert, 
and Miller, Proc. Davenport Acad, of Nat. Sciences, Yol. 
8, p. 256. 
ft Leaves 3-5-lobed toward the apex. 
Quercus marylandica Muench, Hausv., 5:253, 1770. Black- 
Jack or Barren Oak. Our representatives of this species 
are usually small trees; leaves obovate, stellate-pubescent 
above, rusty-downy beneath when young, 3-5-lobed toward 
the apex, lobes entire or bristle-toothed, base rounded or 
subcordate; acorn ovoid, twice the length of the cup, sur- 
mounted by a conical dome; cup deep; scales oblong-lan- 
ceolate, appressed, pubescent. Quercus nigra B L., Sp., PI. 
995, 1753. 
So far as our observations go this species occurs only in 
dry soil on the uplands. It is infrequent or even rare, 
occurring in Decatur and Appanoose counties, where our 
specimens were obtained. The probabilities are that the 
species occurs in Iowa only on the southern border. The 
species occurs in Nebraska, ranges southward to Texas 
and eastward to Ohio and New York, but does not occur 
northward. Specimens from Decatur county were sent to 
the Missouri Botanical Gardens for final determination. 
Fitzpatrick, Proc. Iowa Acad, of Sciences, Yol. 6, p. 197. 
Quercus nigra L., Sp., PI. 995, 1753. Water Oak. With 
us this species is usually small; leaves spatulate, or some- 
times entire and rounded, coriaceous, short-petioled, both 
sides green and glabrous, tufts of hair in the axils of the 
veins beneath; acorn globose, ovoid, with a slight but 
