— I2I 
104. Clado7tia sylvatica (L.) Hoffm. Two specimens. (Fitzwilliam.* 
common.) 
105. Cladonia alpestris (L.) Rabenb. Two specimens. (Fitzwilliam, 
common.) 
106. CladoJita F/oerkeafia (Fr.)SommL One specimen. 
107. Clado7iia FloerkeaTta i7iter77iedia Hepp. One specimen. 
108. Cladofiia a77iaurocraea One specimen. 
109. Clado7iia UTicialis (L. ) Web. Hoffm. Six specimens. 
110. Clado7iia UTicialis obtusata Ach. Three specimens. 
111. Clado7iia reticulata lacunas a (Bor.) Wain. Four specimens. 
112. (?) Cladonia coccif era One doubtful specimen. 
1 13. Cladonia coccifera pleurota Flk. Three specimens. (Fitz william, 
common.) 
114. Cladonia coccifera ste77iatma Wain. Two specimens. 
115. Clado7tia digitata Schaer. One specimen. 
116. Clado7iia digitata 7no7istrosa Wain. Four specimens. 
117. Cladonia didy7na pyg77iaea Wain. Four specimens. 
118. Clado7iia bacillaris Four specimens. 
119. Clado7iia 77iacilenta (Ehrh.) Hoffm. Two specimens, one doubtful, 
determination by Dr. L. W. Riddle. 
120. Cladonia cristatellaTMok. Seven specimens. ( Fitzwilliam, common.) 
121. Clado7iia cristate lla ochrocarfia Tnok. Five specimens. 
122. Cladonia cristatel la vestita Tuck. One specimen. 
There were three specimens returned by Dr. Scriba as indeterminable. 
Concord, Mass. 
TO BE CONTINUED. 
FIELD NOTES ON EPHE/VIERUM AND NANOMITRIUM. 
George E. Nichols. 
The writer is about to undertake a study of the North American species 
of Ephemerum and Nanomitrium— our only representatives of the group 
known as the Ephemereae— and for this purpose desires to obtain specimens 
from all parts of the country. These two genera include some of the small- 
est known mosses, and it is perhaps not to be wondered at that they are not 
overabundantly represented in herbaria. The paucity of available material 
is not, however, due to the scarcity of the plants, for almost without doubt 
one or more species may be found in any region of temperate or tropical 
America where there are appropriate habitats. The writer rarely takes a 
day's tramp in the fall without discovering one or more new stations. It is 
with a view to introducing these tiny plants to those moss students who are 
not already personally acquainted with them, and of thus obtaining more 
extensive material upon which to work, that the writer ventures the follow- 
ing brief remarks relative to their habit and field characters, time of fruit- 
ing, habitat, and range. 
Habitat and Field Characters. As already intimated, all of the 
species of Ephemerum and Nanomitrium are very minute. The leafy shoot 
