JP Ib A Ia, CXC I, 
FLorA oF THE PoTromMac FORMATION. 
TGSseler 
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Fic. ORBYOGIER STAUPAIN GIG SINT @ 1: ANAT VZAU8 HO Kae V2 523 
Ries ) HOeSATICcIPHY GUM ELITPT CUMOHOnteseeee art ee ener ee ae eee eae eee 524 
Hic: 9, U1) Ray RSOPTERIS; DECURRENS) Hontiasi a setae ere ee eee eee ee eee ae 525 
