IOWA ACADEMY OF SCIENCES 183 



Geol. Sur., Vol. 8, p. 314; Clow, Proc. Iowa Acad, of Sci- 

 ences, Vol. 6, p. 61; Pammel, Iowa Geol. Sur., Vol. 5, p. 

 237; Iowa Cleol. Sur., Vol. 9, p. 240; Vol. 10, p. 312; Came- 

 ron, Iowa Geol. Sur., Vol. 8, p. 198; Macbride, Iowa Geol. 

 Sur., Vol. 4, p. 119; Vol. 7, p. 107; Vol. 9, p. 153; Vol. 10, 

 p. 647; Reppert, Iowa Geol. Sur., Vol. 9, p. 386; Barnes, 

 Reppert, and Miller, Proc. Davenport Acad, of Nat. Sci- 

 ences. Vol. 8, p. 256. 



Qnercus minor {MnYsh.) Sarg. Post or Iron Oak. Usually 

 a small tree, with rough, gray bark, and broadly obovate, 

 deeply lyrate-pinnatifid leaves which are dark green above 

 and brown-tomentulose beneath; divisions 3 to 7, some- 

 times undulate or toothed; fruit sessile or nearly so; cup 

 hemispheric, bracts lanceolate, subacute, slightly squar- 

 rose; acorn ovoid, two to three times the length of the cup. 

 Qiiercas alba minor Marsh., Arb. Am. 120, 1785; Querciis 

 stellata Wang., Amer. 78, PL 6, f. 15, 1787; Quercus obtiisi- 

 loba Mx., Hist. Chen. Am., 1,P1. 1, 1801; Quercus minor '^^x- 

 gent, Gard. and For. 2:471, 1889. 



The wood of this species is hard, close-grained, brown, 

 and very durable. The specific gravity of this oak is 

 greater than any other, save one of our species. The 

 small trees make excellent posts for wire fences. The 

 rarity of the species in Iowa prevents its use to even a 

 limited extent. So far as we know, it is found in Iowa 

 only in Appanoose county, where we have observed the 

 species for several years. It grows in dry soil on the 

 upland ridges, where it occurs in small groves. The species 

 is found in Michigan on the north, and southwestward in 

 Texas, and extends as far east as Massachusetts. Profes- 

 sor Arthur includes the species in his catalogue under the 

 name, Quercus obfusiloba Mx., but gives no locality. 



Arthur, Contr. to the Flora of Iowa, p. 29; Fitzpatrick, 

 Proc. Iowa Acad, of Sciences, Vol. 5, p. 163. 



Quercus macrocarpa Mx., Hist. Chen. Am. 2, PI. 23, 1801. 

 Mossy-cup or Bur Oak. Tree 100-150 feet or more in 

 height; sometimes shrubby, with gray, flaky, deeply-fur- 

 rowed bark, the twigs rough or corky- winged; leaves 



