PIPER FLORA OF THE STATE OF WASHINGTON. 177 



their inclusion. Carex incixa Boott'' is hasccl on Geyer's spt'ciaicn collected in "ricli 

 movild; thickets of the fertile jjlair.s above Colville." The brief description is as follows: 

 "DifTert a C. scahrata Schkuhr perigyniis Lievibus, etc., squaniis foemineis viscidis, etc., 

 F. B." It luis not been identilied. 6'«rc,/' /owa Schk., reported in Hooker's Flora 6 as 

 collected b}' Scouler 0:1 tiie CV)]unibia Kivei-, luis i;ot since been found in this region. 

 Other species reported fro.u the Columbia liiver in Hooker's Flora are 0. strida'L&m., 

 C. angustata Boott, C. lagopodlouA's Schk. (C. trlbvloldes Vv^JiI.) i.::d C. straminea Schk. 

 As none of these have recently' been collected, it is quite cerlaii. that the specimens will 

 be found to represent otJier species. 



ARACEAE. Arum Famh.y. 

 LYSICHITON. 



1. Lysichiton camtschatcense (L.) Scliott, Prodr. Aroid. 421. ISfiO. Skunk cabbage. 



Sy)ti]>locar])us katriffichaiiois Bo:ig. Mem. Acad. St. Petersb. \\. 2: liJS. 1,S82. 



Dracontium curntschatcense L. Sp. PI. 2: 'J68. 17.53. 



Type locality: "Habitat iii Sibiria." 



Hanue: Alaska to California and Idaho. Siberia. 



Specimens examined: Clallam County, Ehne?' 2786; Seattk-, Piper, July, ISila; Silverton, 

 BoucJc 174; upper Nisqually Valley, Allen 210; Wcnache Lake, Sandherg d; Leiberg 042; 

 Yakima Pass, Watson 400; Nason City, Sandherg d: Leiberg, July, 1893; Marshall Junction, 

 Piper, July, 1896; Davis Ranch, Kreager 295. 



Zonal distribution: Transition. 



LEMNACEAE. Duckaveed Famha'. 



Tiialloid shoot with 1 root Lemna. 



Thalloid shoot with several roots Spibodela. 



LEMNA. 



Thalloid shoot nearly circular, 1..5 to 5 mm. long 1. L. minor. 



Tiiailnid shoot oblong, stalk-like at l)ase . 2. L. Irisiilca. 



1. nemna minor L. Sp. PI. 2: 970. 1753. 

 Type locality: Europe. 



Range: Nearly cosmopolitan. 



Specimens examined: Wliidby Island, Gardner 429; Eliensburg, Piper, May, 1897; 

 North Yakima, Henderson 2534; Wnitsburg, Horner, July, 1896; Me^'ers Falls, Kreager 515. 



2. Lenina trisulca L. Sp. PI. 2: 970. 1753. 

 Type locality: Europe. 



Range: Throughout North America. Asia. Europe. 



Specimens examined: Coupeville, Gardner 430; near Seattle, Tar/e/on. 



SPIRODELA. 



1. Spirodela polyrhiza (L.) Schleid. Liimaea 13: 392. 1839. 

 Lemna polyrhiza (L.) Sp. PI. 2: 970. 1753. 

 Type locality: Europe. 

 Range: Nearly cosmopolitan. 

 Specimens examined: Whidby Island, Gardner 428; Seattle, Piper, August, 1897. 



« Boott; Hook. Journ. Bot. 7: 377. 1869. 

 &Hook. Fl. Bor. Am. 2: 212. 1839. 

 29418—06 M 12 



