278 PLANT LIFE OF ALABAMA. 
COLLEMA Wicgg. 
Collema myriococcum (Ach.) Arn. 
Calcareous rocks. Lawrence County (Peters). 
Carolinian and Alleghenian (?) areas. New Jersey, New York. 
Collema pycnocarpum Nyl. 
On trunks. Lawrence County (Peters). 
Louisianian to Alleghenian area. Florida to South Carolina, Ohio, Tennessee, 
Illinois, Arkansas, New England to Canada. 
Collema cyrtaspis Tuck. 
On trunks. Lee County, Auburn (Baker §° Karle). Winston County (Peters). 
Carolinian area, Virginia, New Jersey, Pennsylvania, west to Illinois and 
Arkansas, 
Collema laciniatum Nyl. 
Caleareous rocks. Lawrence County ( Peters). 
Carolinian area. Kansas. 
Collema callibotrys Tuck. 
On trees. Lee County, Auburn (Baker §: Earle), Tennessee Valley, Moulton 
( Peters). 
Louisianian and Carolinian areas, Texas to Florida and South Carolina, 
Collema aggregatum Nyl. 
On trees. Abbeville (Baker J§: Farle), 
Louisianian area, Cuba, Mexico, South America. 
Collema leptaleum Tuck. 
On trees. Lee County, Auburn (Baker § Earle). Lawrence County (Peters). 
Louisianian to Alleghenian area. Texas and Louisiana to South Carolina, Vir- 
ginia, and New England. Europe. 
Collema nigrescens (Huds.) Ach. 
On trunks, open woods. Mobile County, Citronelle (Baker). 
Louisianian to Alleghenian area, Florida to Virginia, Pennsylvania, Ohio Valley, 
Canada, California. Europe. 
Collema nigrescens leioplaca Tuck. 
On bark and trunks, in the open. Mobile County, frequent. 
Louisianian area. Louisiana to Florida, South Carolina. 
Collema texanum Tuck. 
On calcareous earth. Lawrence County (Peters), 
‘arolinian area, Texas (Rio Grande). 
Collema tenax (Sw.) Ach. 
Mossy limestone rocks. Lawrence County (Peters), 
Carolinian and Alleghenian areas. New Jersey to New Eng!'and, Missouri. 
Collema pustulatum Ach. 
Limestone rocks. Lawrence County (Peters). 
Carolinian area. Pennsylvania. 
OMPHALARIA Dur, & Mont. 
Omphalaria symphorea (DC.) Tuck. 
Limestone rocks. Lawrence County (Peters). 
Carolinian area. Europe. 
Omphalaria girardi Dur. & Mont. 
Calcareous rocks. Lawrence County (Peters), 
Omphalaria umbella Tuck. 
Limestone rocks. Lawrence County (/eters), 
