Flora of the Allegany State Park Region 111 



Oenothera biennis L. Evening Primrose 



Along stream hanks, thickets, open woods and 



waste ground. Scarce, chiefly in and about the more 



thickly settled sections of the Allegheny and Tunung- 



want valleys. Perhaps not native in this region. 



Oenothera tetragona Roth, 0. fruticosa of Gray's Man. 



Knciffia tetragona Pennell. Torr. Cluh Bui. 



46:370. 1919. Sundrops 

 In dry sandy or gravelly, usually acid soil of the 

 bottomlands and benches of the Allegheny valley, 

 sometimes in more moist situations. Common and 

 when in bloom (late July and early August) very 

 conspicuous. 

 Oenothera perennis L., 0. pumila L. in Gray's Man., 

 Knciffia perennis Pennell. Small Sundrops 

 In moist sandy, gravelly or rocky soil of hanks, 

 bluffs and meadows. Frequent at lower altitudes 

 along the Allegheny river. Rare or ahsent in the 

 higher portions of the park area. 

 Circaea alpina L. Smaller Enchanter's Nightshade 



Cool mossy places in dense forests, along mossy 

 borders of brooks and springs, and in low or wet, 

 usually mossy woods. Frequent. Along Quaker 

 run, upper part of Red House creek, about springs 

 on Three' Sister's mountain. Stony creek, Pine hill 

 etc. 

 Circaea latifolia Hill, C. lutetiana Gray's Man. Larger 

 Enchanter's Nightshade 

 In moist or wet, usually fertile humus of open or 

 dense woods. Common. Forms are found which 

 seem to approach C. intermedia of Gray's Man. 

 (C. canadensis Hill, see Rhodora 19:87. 1917), 

 but if this species occurs in this region it is not 

 sufficientlv distinct. 



