Flora of the Allegany Slate Park Region 67 



In most places the trees are badly diseased by the 

 Chestnut blight disease, Diaporthe parasitica Murrill, 

 and while sprouting abundantly from the trunks it 

 seems but a question of a few years when the chest- 

 nut will be exterminated in this region by this 

 disease. 

 Quercus alba L. . White ( )ak 



A frequent forest tree on most of the lower slopes 

 and the drier portions of the bottomlands throughout 

 the regioH ; occasional on the higher ridges. On 

 Huckleberry hill is found the var. latiloba Sarg. 

 Quercus montana Willd., Q. Prinus of Gray's Man. ed. 

 7. See Rhodora 17: 40. 1915. Chestnut Oak 

 In dry, sterile, chiefly rocky soil. Infrequent. 

 Bluffs along the Allegheny river toward Elko etc. 

 Quercus bicolor Willd. Swamp White Oak 



In low or wet, chiefly alluvial soil and swampy 

 situations in the lower Tunungwant valley, Butler 

 run, and the Allegheny valley. 

 Quercus rubra L. Q. borealis Michx. f. var. maxima 

 (Marsh.) Sarg. Rhodora 18: 48. 1916. Red 

 Oak 

 A common forest tree in most sections of the park 

 area, with little reference to soil fertility, but gen- 

 erally absent where it is very wet or swampy. 

 Quercus velutina Lam. Black Oak, Dyer's Oak, Quer- 

 citron 

 In dry, rocky, stony or gravelly, sterile or acid 

 soils. Locally frequent. Occasional on the conglom- 

 erate soils of the higher ridges, common on Huckle- 

 berry hill, Jones hill, Elko mountain, benches opposite 

 Red House, Peters run, Carrollton etc. 



