HEPATICAE. 
MARCHANTIALES. 
RICCIACEAE. 
Riccia L. 
R. arvensis Austin.—NorTHAMPTON, Lehigh Mountain, Raw. 
R. crystallina L.—PHILADELPHIA, Moyamensing, James. 
R. fluitans L.—In stagnant and running water. NorTH- 
AMPTON, Lucy Furnace, Rau; LEHIGH, Rau, BucKs and 
PHILADELPHIA, James; DELAWARE, Radnor, James; CHES- 
TER (Flora Cestrica); LANCASTER, Collin’s Ferry, Porter. 
R. glauea L.—On damp earth. PHILADELPHIA, Bustleton, 
James; CHESTER (Flora Cestrica); FRANKLIN, Mercersburg, 
Porter. 
{ 
R. nigrella DC.—LANCASTER, Porter. 
R. Sullivantii Aust.—LEuiIcH, Raz. 
Ricciocarpus Corda. 
R. natans (L.) Corda.—Flonting on water. Monrog, Craw- 
ford; SUSQUEHANNA, Graves; LANCASTER and HUNTING- 
DON, Porter; ALLEGHENY, Kuzpe. 
MARCHANTIACEAE. 
Reboulia Raddi. 
R. hemisphaerica (L.) Raddi—NorTHAMPTON, PHILADEL- 
PHIA, James; DELAWARE (Smith’s Catalogue); CHESTER 
(Flora Cestrica); LANCASTER and FRANKLIN, Porter. Very 
common. 
