150 JOURNAL OF THE ARNOLD ARBORETUM (vol. tt 



Tilia glabra Vent. Uncommon, but in places not rare in the Mounds 

 Formation, where it grows on banks of streams and steep hillsides. In 

 the Ozark Ridge it is rarely found along the bases of high rocky blufTs. 

 Seen in Alexander, Union, Pulaski, Johnson, Pope, Ilardin, Gallatin and 

 White Counties. 



Tilia hcterophylla var. Michauxii (Nutt.) Sarg. Rather rare on hill- 

 sides and along streams in the Mounds Formation, and below high rocky 

 bluffs in the Ozark Ridge region. Observed in Pulaski, Pope and Hardin 

 Counties. 



Tilia floridana Small. One tree referred to this species was found 

 growing on a hillside above the Wabash River, near Grayvillc, White 

 County. It was also collected on low hills bordering the Ohio River, 

 near Wickliffe, Kentucky, across from Cairo; and it may be looked for 

 elsewhere in the Mounds Formation, 



Ascyrum hypcricoidcs L. Found only in dry rocky woods in the Ozark 

 region. 



Hypericum prolificum L. Locally common along the rocky beds and 

 banks of streams in the Ozark Ridge and northward. 



Parthcnocissus quinquefolia (L.) Planch. Observed only along rocky 

 l)luffs and stream banks in the Ozark Ridge region. 



Parthcjwcissus quinquefolia var. hirsuta (Donn) Planch. Much more 

 abiuidant and widely distributed than the last. Found more or less 

 commonly throughout, in woods and along rocky bluffs. 



Avipelopsis cordata Michx. Found occasionally throughout the region, 

 in low alluvial ground and on open banks of streams; nowhere very abun- 

 dant. 



Vilis aestivalis Michx. Frequent in dry open rocky woods in the 

 Ozark Ridge and northward. 



Vitis cincrea Engelm. Common in open ground and on alluvial banks 

 of streams throughout the region. 



Vitis cordifolia Michx. A common grape in woods and open ground 

 throughout the region. 



Vitis vulpina L. Locally common on low alluvial banks of streams 

 in the Cairo Formation. 



Vitis palmata Vahl. A typical sj)ecies of the Cairo Formation, where 

 it grows in swamps and along low margins of streams and lako'^. 



Aralia spinosa L. A typical species of the Mounds Formation, grow- 

 ing in openings in the woods and along rich banks. It is very abundant 

 in the low hills about Shawneetown, Gallatin County. 



Cornus florida L. Found more or less commonly throughout the re- 

 gion; most abundant in dry rocky open woods of the Ozark Ridge For- 

 mation. 



Cornus rugosa Lam. Locally common along rocky bluffs of the Ohio 

 River and in adjacent rocky woods, in Pope and Hardin Counties. 



Cornus amomum Mill. Uncommon along small streams and in low 

 open ground throughout the region. 



