380 HERRE 



1. LEPTOGIUM ALBOCILIATUM Desmaz. 



Thallus small to medium size, rounded, by coalescence form- 

 ing extensive indeterminate mats ; lobes imbricate, deeply and 

 sinuately laciniate, their tips rounded or pointed ; margin in folds 

 or crisped, up-turned, crenate, lacerate, or denticulate; surface 

 smooth, centrally often granulate or with small erect lobules; 

 color greenish black ; the margin ciliate with minute w^hite 

 bristles; under surface paler; marginally with a conspicuous 

 white fleece ; this longer, shaggy, and brown within, rarel}' dis- 

 appearing. Apothecia numerous, becoming crowded when 

 present; small to medium size, sessile; disk reddish, plane or 

 convex ; margin pale, entire, finally disappearing ; often bristly 

 wath minute white cilia similar to those on margin of thallus. 

 Spores bilocular. 



Found throughout on rocks and earth among mosses. 



Fruiting abundantly at 3000 feet altitude on Castle Rock 

 Ridge and in Devils Canon at 2300 feet ; still luxuriant in 

 growth as low as 2000 feet. Extending downward to 150 feet 

 in the foothills, but there reduced and sterile. 



Fruiting specimens collected too late to be submitted to Dr. 

 Zahlbruckner. 

 Le^togimn alhocilaUim Desmazieres, Ann. Sci. Nat. iv. 4 : 132. 



1855- 



2. LEPTOGIUM SCOTINUM (Ach.) Fries. 

 Thallus small, suborbicular or effuse, appressed, with up- 

 turned edges ; lobes rounded, more or less complicate ; margin 

 entire, crenate, or somewhat laciniate ; greenish lead-color to 

 brown. Apothecia numerous and comparativeh^ l^i'ge, reddish 

 brown; margin entire, paler; spores -^ mic, muriform-mul- 

 tilocular. 



On earth, among mosses. 



A few specimens collected on a high clay bank on Black 

 Mt., at an altitude of 900 feet. Should be looked for in similar 

 situations throughout. From its small size too readil}' over- 

 looked. 



Lichen scotinus Ach. Lichenogr. Suec. Prodr. 128. 1798- 

 Collcnia scotinuni Ach. Lich. Univ. 651. 1810. 

 Le^togituu scotinmn Fries, Sum. Veg. 122. 1846. 



