244 ERYTHEA. 
Hypericum mutilum, L. Possibly introduced. Sept. 16, 
1891. 
Polygonum Muhlenbergt, Wats. Cache Slough. June 
20, 1893. 
Polygonum acre, HBK. 
Polygonum nodosum, Pers. 
Atriplex coronata, Wats. Andrus Island; Tyler Island, 
near head of Georgiana Slough. 
Atriplex spicata, Wats. New Town Landing. 
Atriplex hastata, L., var. oppositifolia, Moq. Knott's 
Landing. 
Epilobium paniculatum, Nutt. 
Epilobium Californicum, Hausskn. Quite abundant. 
Boisduvalia densiflora (Lindl.), Wats. Five feet high. 
Boisduvalia densiflora (Lindl.), Wats., var. imbricata, 
Greene. Six and seven feet high. 
Isnardia palustris, L. 
Jussica diffusa, Forsk., var. Californica (Wats.), Greene, 
ined. Ryer Island. Terrestrial as well as aquatic. 
Ammannia coccinea, Rottb. Grand Island. 
Nasturtium dictyotum, Greene. Grand Island. Sept. 17, 
1891. 
Hydrocotyle prolifera, Kellogg. Near Rio Vista. 
Sium heterophyllum, Greene. Tyler Island. 
Solidago Californica, Nutt. 
Euthamia occidentalis, Nutt. 
Aster ewilis, Ell. New Town Landing and Andrus Island. 
Aster Douglasii, Lindl. Provisionally referred here. Of 
bushy habit; the lower leaves narrowly lanceolate, nine inches 
long, falcate, remotely serrate, the entire margin scabrous | 
_ gerrulate. 
Gnaphalium palustre, Nutt. Knott's Landing. 
Baccharis Douglasii, DC. 
Pluchea camphorata, DC. 
Eclipta alba, Hassk. Grand Island. Sept 17, 1891. 
Helianthus Californicus, DC. 
Bidens frondosa, L. Very common; first collected on 
Grand Island in 1891. 
