go Muhlenbergia, Volume 9 
RUMEX SALICIFOLIUS Weinm. 
Brackish marshes inland along the sloughs, g8oo, Septem- 
ber 1, IgII. 
POLYGONUM PARONYCHIA C. & 5S. 
A common and important sand binding plant of the sand 
dunes, 4728, August 19, 1911. 
SALICORNIA AMBIGUA Michx. 
Margins of the sloughs and sand dune meadows, 7699, Aug- 
ust 19, 1911. Hayden 76. 
ATRIPLEX HASTATA IL. 
A common plant of the wet margins of the 1umerous 
sloughs, z8o7, September 1, 1911. If introduced, it must have 
been very early, because the plant is common in the most re- 
mote places. 
ABRONIA LATIFOLIA Esch. 
Rather common and important sand binding plant of the 
sand dunes, 4774, August 19, 1911. Hayden 67. 
CLAYTONIA SIBIRICA L, 
Common everywhere in woods, 688, August, 1911. 
CLAYTONIA PARVIFLORA Dougl. 
Common; open woods and meadows near Coos Head, 5077, 
September 15, 1912. Hayden 198, 250. 
CLAYTONIA PARVIFOLIA Moc. 
Rocks at the head of Coos river, 996, September 1, 1912. 
CERASTIUM BERINGIANUM C. & S. (Det. Greene.) 
Moist rocks and ciifis, head of Coos river, 960, August 20, 
1912. This plant, which is not rare here, represents a species 
which has been long overlooked or else is passing under some 
other name, as I find no account of its occurrence on the Pacific 
coast by recent authors. 
SPERGULA ARVENSIS L, 
A common weed, Marshfield, ggg0, September, 1912. 
NYMPHAEA POLYSEPALA (Engelm.) Greene 
Comon in the ponds and marshes of the sand dunes, Hay- 
den 215. 
