74 Rhodora [May 
Williams et al.; rocky roadside, Woburn, Pease, no. 7659; clearing in 
dry woods, Walpole, Rich; Powisset Clift, Dover, Pease, no. 7747; 
Hawk Hill, Blue Hills, Kidder; rocky shrubby hill, Sharon, Williams; 
dry ground, Norfolk, Ware et al.; sandy woods, Franklin, Hunnewell; 
dry sandy clearing, Lakeville, Fernald & Long, no. 9707; open sandy 
soil near Darby Station, Plymouth, Fernald, Hunnewell & Long, no. 
9708; sand plain, Montague, Fernald et al.; wet sand by Connecticut 
R., Gill, St. John & Weatherby; dry ledges at summit of Mt. Tom, 
Forbes & Wheeler; sand, Southwick, Murdoch & Schweinfurth; Alum 
Hill, Sheffield, Hoffmann. Ruopr IstaNb: dry soil, Cumberland, 
Knowlton; Providence, Williams. Connecricut: Plainville, L. And- 
rews, no. 222; sandy roadside, Southington, Bissell, no. 194; exposed 
top of Wolcott Mt., Southington, Blewitt, no 1734; dry exposed ledges, 
Waterbury, Blewitt, no. 205. New York: Ausable Point, Eggleston; 
sandy thicket, Albany, House, no. 6046; South Hill, Ithaca, F. C. 
Curtice; hammocks, South Hill Marsh, Ithaca, Hames & Wiegand, 
no. 2071. New Jersey: high rocky hills, High Point, Mackenzie, 
no. 4197. PENNSYLVANIA: serpentine barrens, near Pleasant Grove, 
Lancaster Co., Heller € Small. MICHIGAN: sandy ground near Au 
Gres, Arenac Co., Dodge, no. 4; Agricultural College, Wheeler; sand 
dunes by L. Michigan, Indiana Harbor, Hill, no. 117. WISCONSIN: 
sandy ridges and shores, Schuette. MINNESOTA: Spring Grove, 
Rosendahl, no. 307. MantroBa: Lake Winnipeg Valley, Bourgeau. 
Gray HERBARIUM. 
NOTES ON NEW ENGLAND HEPATICAE,—XVII.!' 
ALEXANDER W. Evans. 
In the fifth series of these Notes? the writer recognized the genus 
Ricciella A. Br. as valid, separating it from Riccia L. on the basis of 
certain anatomical differences in the thallus. It has since been demon- 
strated that these differences are inconstant and that the genus 
Ricciella ought not to be maintained? The four New England 
species referred to Ricciella should therefore be known as Riccia 
crystallina L., Riccia fluitans L., Riccia membranacea. Gottsche & 
Lindenb. and Riccia Sullivantiz Aust. 
Another genus based on equally vague anatomical characters is 
Neesiella Schiffn., of which two species, N. pilosa (Hornem.) Schiffn. 
! Contribution from the Osboru Botanical Laboratory. 
? Ruopora 9: 56. 1907. 
3 See Evans, Bryologist 25: 81. 1922. See also Howe, North Am. Flora 14: 11 
1923. 
