270 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
2346, 493; Mabton, Cotton 321; Rockland, Suksdorf 1959; Rock Creek, Piper 2790; Coulee 
Nity, Piper 3875; Rock Lake, Sandberg & Leiberg 112; Spokane, Piper 2283; Hangman 
Creek, Sandberg & Leiberg 3; Waverly, Suksdorf, 2342; Pullman, Elmer 184; Piper 1459. 
ZONAL DISTRIBUTION: Arid Transition. 
2. Myosurus minimus L. Sp. Pl. 1: 284. 1753. 
TyPE Locauity: European. 
Rance: Washington and California to Illinois and Florida. Europe. 
SPECIMENS EXAMINED: West Klickitat County, Suksdorf 2344. 
3. Myosurus major Greene, Pittonia, 3: 257. 1898. 
Type Loca.ity: Siskyou County, California. 
SPECIMENS EXAMINED: Coupeville, Gardner 11; Clallam County, Elmer 2674; Stuart 
Island, Lawrence 77. 
ZONAL DISTRIBUTION: Humid Transition. 
BATRACHIUM. 
1. Batrachium aquatile (L.) Wimm. FI. Schles, 8. 1841. WATER CROWFOOT. 
Ranunculus aquatilis L. Sp. Pl. 1: 556. 1753. 
Type LocaLitry: Europe. 
Rance: Alaska to California. Europe. Asia. 
SPECIMENS EXAMINED: Oyhut, Lamb 1261; Tacoma, Lockenby, May, 1898; Flett, May 9, 
1895; White Salmon, Suksdorf; Rock Creek, Sandberg & Leiberg 90; Walla Walla region, 
Brandegee 606; Pullman, Elmer 841; Hull 409; Falcon Valley, Suksdorf 1960. 
ZONAL DISTRIBUTION: Transition to Canadian. 
la. Batrachium aquatile pantothrix (Brot.). . 
Ranunculus pantothrix Brot. Fl. Lusit. 2: 375. 1804. 
Ranunculus aquatilis trichophyllus A. Gray, Man ed. 5, 40. 1867. 
Ranunculus trichophyllus Chaix.; Vill. Fl. Dauph. 1: 335. 1786, nom. nud. 
Type Locauity: “Circa Conimbricam” in Lusitania. 
RanGE: Alaska to Nova Scotia, south to California and Tennessee. Europe. Asia. 
SPECIMENS EXAMINED: San Juan Island, Lyall in 1858; Cascade, Mountains, latitude 
49°, Lyall in 1859; Parker, Dunn, August 8, 1901; Cascade Mountains to Colville, Lyall in 
1860; Crab and Wilson creeks, Sandberg & Leiberg 265; Harrington, Sandberg & Leiberg 
220; Marshall Junction, Piper; Box Canyon, Kreager 395; Chewelah, Kreager 528; Pend 
Oreille River, Lyall in 1861; Pullman, Hull 410. 
The form in flowing streams usually has longer and more flaccid leaf-segments. It is 
Ranunculus flaccidus Pers. or Batrachium flaccidum (Pers.) Rupr. and is probably worthy 
of recognition as a subspecies. 
1b. Batrachium aquatile caespitosum (DC.) 
Ranunculus aquatilis caespitosus DC. Prod. 1: 26. 1824. 
Type LocaLiry: None given. 
RanGE: Same as of B. aquatile. 
SPECIMENS EXAMINED: Spokane, Piper 2633, 2943; Waitsburg, Horner 41. 
RANUNCULUS. Burrercup. 
Plants aquatic or subaquatic; leaves finely dissected when 
submersed, less so when aerial. 
Akenes corky margined; flowers 15 to 25 mm. broad. 1. R. delphinifolius. 
Akenes marginless; flowers 7 to 15 mm. broad....... 2. R. purshir. 
