NADVORNIKIA Tibell
Nadvornikia sorediata R. C. Harris 
Ladd et al. (1994): Ste. Genevieve Co.
NECTRIA (Fr.) Fr.
Nectria heterospora 
Nectria parmeliae
Nectria parmeliae (Berk. & M. A. Curtis) D. Hawksw.* Hawksworth & Booth (1976): specimens cited from Perry Co. and Salt River [as N. heterospora]. Ladd (1996): Phelps Co.Seaward (1978): Salt River basin [as N. heterospora].
NEPHROMA Ach.
Nephroma helveticum Ach. Gier & Kendrick (1972): mention "should" occur in Mo. Hale (1969): mapped from S3/5 Mo. Hale (1979): mapped from SE1/3 Mo.
NORMANDINA Nyl.
Normandina pulchella (Borrer) Nyl. Ladd et al. (1994): Reynolds Co.
