PIPER—FLORA OF THE STATE OF WASHINGTON. 177 
their inclusion. Carer incisa Boott @ is based on Geyer’s specimen collected in “rich 
mould; thickets of the fertile plains above Colville.’ The brief description is as follows: 
“Differt a C’. seabrata Schkuhr perigyniis laevibus, etc., squamis foemineis viscidis, etc., 
F. B.” It has not been identified. Carer rosea Schk., reported in Hooker’s Flora } as 
collected by Scouler on the Columbia River, has not since been found in this region. 
Other species reported from the Columbia River in Hooker’s Flora are C. stricta Lam., 
C. angustata Boott, C. lagopodioides Schk. (C. tribuloides Wahl.) and ©. straminea Schk. 
As none of these have recently been collected, it is quite certain that the specimens will 
be found to represent other species. 
ARACEAE. Arum Faminy. 
LYSICHITON. 
1. Lysichiton camtschatcense (L.) Schott, Prodr. Aroid. 421. 1860. SKUNK CABBAGE. 
Symplocarpus kamtschaticus Bong. Mem. Acad. St. Petersb. VI. 2: 168. 1832. 
Dracontium camtschatcense L. Sp. Pl. 2: 968. 1753. 
Type Locauity: ‘ Habitat in Sibiria.” 
Rance: Alaska to California and Idaho. Siberia. 
SPECIMENS EXAMINED: Clallam County, Elmer 2786; Seattle, Piper, July, 1895; Silverton, 
Bouck 174; upper Nisqually Valley, Allen 210; Wenache Lake, Sandberg & Leiberg 642, 
Yakima Pass, Watson 400; Nason City, Sandberg & Leiberg, July, 1893; Marshall Junction, 
Piper, July, 1896; Davis Ranch, Areager 295. 
ZONAL DISTRIBUTION: Transition. 
LEMNACEAE. Duckwerep FAMILY. 
Thalloid shoot with 1 root..................--2-.---.-------- peeeee eee LEMNA. 
Thalloid shoot with several roots................-.-2-.-2----------------- SPIRODELA. 
LEMNA. 
Thalloid shoot nearly cireular, 1.5 to 5mm. long...........-.-.--------- 1. L. minor. 
Thalloid shoot oblong, stalk-like at base ........-.-.-.-.--------------- 2. L. trisulea. 
1. Lemna minor L. Sp. Pl. 2: 970. 1753. 
TyprE Locairy: Europe. 
Rance: Nearly cosmopolitan. 
SPECIMENS EXAMINED: Whidby Island, Gardner 429; Ellensburg, Piper, May, 1897: 
North Yakima, /Tenderson 2534; Waitsburg, Horner, July, 1896; Meyers Falls, Kreager 515. 
2. Lemna trisulca L. Sp. Pl. 2: 970. 1753. 
TypE LocaLiry: Europe. 
Rance: Throughout North America, Asia. Europe. 
SPECIMENS EXAMINED: Coupeville, Gardner 430; near Seattle, Tarleton. 
SPIRODELA. 
1. Spirodela polyrhiza (L.) Schleid. Linnaea 13: 392. 1839. 
Lemna polyrhiza (L.) Sp. Pl. 2: 970. 1753. 
TYPE Locaity: Europe. 
Rance: Nearly cosmopolitan. 
SPECIMENS EXAMINED: Whidby Island, Gardner 428; Seattle, Piper, August, 1897. 
4 Boott; Hook. Journ. Bot. 7: 377. 1869. 
b Hook. FI. Bor. Am. 2: 212. 1839. 
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