38 Trans. Acad. Sci. of St. Louis. 



SERIES ANGIOCARPI. 



TRIBE VERRUCARIACEI. 

 Family Verrucariei. 



Segestria. 



153. Segestria nucula, (Fr.) Ach. 



On hickory; linden; magnolia; oak; mulberry; 

 Liquidambar ; Cornus florida ; willow oak. 



Trypthelium. 



154. Trypthelium (Pyrenula) aggregata, Fee. 



Common. On Myrica. 



155. Trypthelium catervarium, (Fee) Tuck. 



Rare. On Myrica. 



156. Trypthelium mastoideum, Ach. 



On mulberry ; pear ; Myrica ; linden ; hickory ; red 

 oak; Xanthoxylum. 



157. Trypthelium achroleum, Nvl. 



On hickory; pear. 



158. Trypthelium achroleum, var. pallescens, Miiller. 



Ou mulberry; hickory. 



159. Trypthelium cruentum, Mont. 



On mulberry; blue gum; pear; plum. 



160. Trypthelium pyrenuloides, Mont. 



Abundant. On linden; Carpinus; hickory; water 

 oak; willow oak; Cornus florida ; magnolia ; mulberry. 



161. Trypthelium scorites, (Tuck.) Nyl. 



Abundant. On oak; Hex opaca; willow oak; 

 hickory. 



162. Trypthelium virens, Tuck. 



Abundant. On blue gum. 



Pyrenula. 



163. Pyrenula cinchonae, (Ach.) Tuck. 



On Myrica. 



