194 IOWA ACADEMY OF SCIENCES. 



yellowish next the wood; leaves similar to Quercus palus- 

 tris Dulloi; acorn solitary or in pa,irs, 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., Vol. 28, p. 215; Barnes, Reppert, 

 and Miller, Proc. Davenport Acad, of Nat. Sciences, Vol. 

 8, p. 256. 



ft Leaves 3-5-lobed toward the apex. 



Quercus nianjlandica 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 ^ew 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, Vol. 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 



