Notes on Washington Plants 



W. C. MUENSCHER 



Since the appearance of that monumental work of its time, 

 "Flora of the State of Washington," by Piper (1), a number of 

 species have been added to the known flora of Washington. Many 

 of these subsequent discoveries were incorporated in floras by Piper 

 and Beattie (2, 3) covering the southeastern and western parts of 

 the state. More recently St. John, in a revision (4), has added 

 other species from southeastern Washington. Jones, in two local 

 catalogues covering the Olympic Peninsula (5) and Mount 

 Rainier (6), has contributed other species not previously reported 

 from Washington. 



The following list contains forty species apparently not pre- 

 viously reported from Washington State. It is possible that some of 

 these may have been previously reported in monographs or brief 

 papers on local areas, at least they do not occur in the publications 

 mentioned above. Unless indicated otherwise, the specimens were 

 collected in Whatcom County by the writer and are deposited in 

 the herbarium of Cornell University. 



Gramineae 



Setaria verticillata Beauv. An introduced weed in gardens and fields 

 in the Nooksack River Valley. 



Pontederiaceae 



Heteranthera duhia (Jacq.) MacM. Abundant in 1 to 2 meters of 

 water in Silver Lake. The gall-forming organism, Sorodisciis 

 Heterantherae Wernham, was found on the roots and stem 

 bases of this aquatic plant. Although the host has been reported 

 from eastern Washington, this is the first record of Sorodiscus 

 Heterantherae from west of New York. 



Salicaccae 



Sali.v alba L. var. vitellina (L.) Koch. Established on the lowlands 



near the mouth of the Nooksack River. 

 Sallx purpurea L. Established along streams and ditches ; Marietta ; 



Squalicum Lake. 



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