84 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



4. Botrychiuni onondagense Underw. Bull. Torr. Clul) 30: 47. 1903. 

 Type locality: Near Split Rock, Syracuse, New York. 



Range: Washington, Mo::ta::a, Michigan, and New York. 



Specimens examined: Olympic Mountains at foot of Mount Steele, Piper 928. 



Zonal distribution: Doubtful. 



5. Botrychium lanceolatum (S. G. Ginel.) Angs. Bot. Notiser 1854: 68. 1854. 

 Osmunda lanceolata S. G. Gmel. Nov. Comm. Acad. Sci. Petrop. 12: 51G. 1768. 

 Type locality: European. 



Range: Washington to Colorado, Pennsylvania, and northward. Europe. Asia. 

 Specimens examined: Foot of Mount Rainier, Allen, August 2, 1899. 

 Zonal distribution: Probably Canadian. 



6. Botrycliiuin neglectum Wood, Classbook Bot. 635. 1847. 

 Type locality: "Growing in woods, Meriden, N. H." 



Range. Alaska to Nova Scotia, south to Washington, South Dakota, and Maryland. 

 Specimens examined: Mount Adams, Sutsf/o;/ 1220. 



MARSILEACEAE. 



MARSILEA. 



1. MarsHea vestita Hook. & Grev. Ic. Fil. pJ. 159. 1832. 



Type locality "Ad flumaen Columbiam, ora occidentali Americae Septentrionalis." 



Range: British Columbia to Kansas and Arizona. 



Specimens examined: Falcon Valley, SuJcsdorf 227; opposite mouth of Wenache River, 

 Waisoii 470; west Klickitat County, Suksdorf 119; Columbia River Valley, Brandegee 

 1225; Wenache, Whited 1426; Pasco, Himhhaw 35; Lake Chelan, Lake <& Hull 657; Pull- 

 man, Piper 1736; Henderson 2431; Wmota., Piper, September 9, 1896; Sentinel Bluffs, 

 Cotton 1347. 



Zonal distribution: Upper Sonoran and Arid Transition. 



SALVINIACEAE. 



AZOLLA. 



1. Azolla caroliniana Willd. Sp. PI. 5: 541. 1810. 

 Type locality: "Hab. in aquis Carolinae." 



Range: British Columbia to Ontario, south to Florida and Mexico. 

 Specimens examined: West Klickitat County, Sj/Zrsrfor/" 1216. - 



Zonal distribu'"ion: Upper Sonoran. 



EQUISETACEAE. 



- EQTJISETITM. Horsetail. 



Stems evergreen, perennial; spike tipped with a rigid point. 



Plant tall and stout; stems many-grooved, 0.5 to 2 meters high. 



Stems rough-tuberculate, dark green I.E. Jiyemale. 



Stems smooth, pale 2. E. laevigatum. 



Plants tufted, slender; stems 5 to 10-grooved. 



Sheaths 5 to 10-toothed; stems hollow "i.E. variegatuni. 



Sheaths 3-toothed ; stems solid 4. £. scirpoides. 



